Please Note

The GDD models have only been “ground-truthed” in the Great Lakes region. Use of models outside of this region, including the North East, Great Plains and Transition Zones, should be used with caution. We do not recommend the GDD models we use for the mid/southern transition zone and southern states.

Welcome!

It appears to be your first time visiting GDDTracker
Please enter your zip code for a customized experience. Also, be sure and watch our video introduction video.

   
       

Air Temperature - 24 Hour Min/Max
at 3 pm on Fri, Jan. 2, 2026

 

25°F (high) at 3 pm on Fri, Jan. 2, 2026

  

Brewster, NY

        

Forecast »

“Flashback” to 2025

1/2

1/3

1/4

1/5

1/6

1/7

1/8

1/9

1/10

1/11

1/12

1/13

1/14

 

40

 

30

 

20

 

10

 

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2024 & 2023

2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 22° 29° 4 0 0 0 0
02-16 30° 38° 15 2 0 0 0
02-17 21° 32° 20 2 0 0 0
02-18 14° 23° 20 2 0 0 0
02-19 13° 27° 20 2 0 0 0
02-20 12° 25° 20 2 0 0 0
02-21 19° 31° 22 2 0 0 0
02-22 13° 36° 25 2 0 0 0
02-23 28° 43° 38 5 0 0 0
02-24 26° 47° 53 10 0 0 0
02-25 35° 55° 76 23 3 0 0
02-26 34° 52° 96 34 4 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 37° 48° 117 44 5 0 0
02-28 36° 45° 136 53 5 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 25° 57° 155 62 5 0 0
03-02 17° 30° 157 62 5 0 0
03-03 16° 35° 160 62 5 0 0
03-04 25° 46° 174 66 5 0 0
03-05 35° 53° 196 78 7 0 0
03-06 32° 51° 215 87 7 0 0
03-07 32° 45° 232 94 7 0 0
03-08 30° 40° 245 97 7 0 0
03-09 30° 49° 262 104 7 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 36° 63° 289 121 14 0 0
03-11 35° 64° 317 139 21 0 0
03-12 38° 49° 338 150 23 0 0
03-13 33° 49° 357 159 23 0 0
03-14 36° 57° 382 174 27 0 0
03-15 39° 46° 402 184 28 0 0
03-16 43° 61° 432 204 38 2 0
03-17 35° 56° 456 218 42 2 0
03-18 31° 57° 478 230 44 2 0
03-19 33° 63° 504 246 50 2 0
03-20 40° 49° 527 259 52 2 0
03-21 37° 48° 547 269 52 2 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 33° 58° 570 282 55 2 0
03-23 28° 44° 584 286 55 2 0
03-24 36° 43° 602 294 55 2 0
03-25 38° 55° 626 308 60 2 0
03-26 32° 46° 643 315 60 2 0
03-27 30° 48° 661 323 60 2 0
03-28 36° 58° 686 338 65 2 0
03-29 41° 73° 721 363 80 9 2
03-30 38° 43° 740 372 80 9 2
03-31 43° 68° 773 395 94 15 3
04-01 37° 57° 798 410 99 15 3
04-02 31° 45° 815 417 99 15 3
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 40° 69° 847 439 112 19 3
04-04 53° 70° 887 469 131 31 9
04-05 41° 51° 911 483 135 31 9
04-06 41° 53° 936 498 140 31 9
04-07 37° 45° 955 507 140 31 9
04-08 33° 39° 969 511 140 31 9
04-09 29° 45° 984 516 140 31 9
04-10 31° 48° 1002 524 140 31 9
04-11 36° 47° 1021 533 140 31 9
04-12 33° 39° 1035 537 140 31 9
04-13 37° 54° 1059 551 143 31 9
04-14 38° 63° 1088 570 152 32 9
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 47° 67° 1123 595 168 39 11
04-16 40° 46° 1144 606 169 39 11
04-17 38° 60° 1171 623 176 39 11
04-18 33° 66° 1199 641 183 39 11
04-19 51° 81° 1243 675 207 55 23
04-20 49° 72° 1281 703 226 66 28
04-21 41° 56° 1308 720 232 66 28
04-22 49° 77° 1349 751 253 79 37
04-23 48° 74° 1388 780 272 90 42
04-24 48° 76° 1428 810 292 102 50
04-25 54° 75° 1470 842 315 117 59
04-26 53° 69° 1509 871 334 128 65
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 43° 53° 1536 888 340 128 65
04-28 44° 73° 1572 914 357 136 68
04-29 49° 76° 1613 945 377 149 76
04-30 53° 70° 1652 974 397 160 82
05-01 42° 70° 1686 998 411 166 84
05-02 54° 81° 1732 1034 436 184 96
05-03 59° 80° 1779 1071 464 203 111
05-04 59° 67° 1820 1102 485 216 119
05-05 57° 63° 1858 1130 503 226 123
05-06 57° 63° 1896 1158 520 236 128
05-07 53° 69° 1935 1187 539 247 134
05-08 53° 73° 1976 1218 560 260 142
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 50° 54° 2006 1238 570 262 142
05-10 49° 69° 2043 1265 587 271 146
05-11 47° 71° 2080 1292 604 280 150
05-12 43° 73° 2116 1318 620 288 153
05-13 56° 69° 2156 1348 640 300 160
05-14 56° 65° 2195 1377 659 311 166
05-15 60° 69° 2237 1409 682 325 175
05-16 61° 72° 2282 1444 706 342 187
05-17 64° 78° 2330 1482 735 362 203
05-18 56° 67° 2370 1512 754 374 209
05-19 48° 66° 2405 1537 769 381 211
05-20 44° 60° 2435 1557 779 383 211
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 45° 52° 2461 1573 786 383 211
05-22 44° 49° 2486 1588 790 383 211
05-23 44° 54° 2513 1605 798 383 211
05-24 45° 60° 2544 1626 808 385 211
05-25 48° 61° 2576 1648 821 390 211
05-26 46° 69° 2612 1674 836 397 214
05-27 47° 72° 2650 1702 854 407 218
05-28 53° 66° 2687 1729 871 416 223
05-29 53° 65° 2724 1756 888 425 227
05-30 56° 71° 2766 1788 910 439 235
05-31 49° 63° 2800 1812 924 445 236
06-01 47° 61° 2832 1834 936 449 236
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 46° 68° 2867 1859 951 456 238
06-03 47° 75° 2906 1888 970 467 244
06-04 55° 82° 2952 1924 997 486 258
06-05 63° 88° 3006 1968 1030 511 278
06-06 68° 84° 3060 2012 1065 538 300
06-07 63° 72° 3106 2048 1090 555 312
06-08 59° 74° 3150 2082 1115 572 324
06-09 59° 62° 3189 2111 1134 583 330
06-10 60° 73° 3234 2146 1158 599 341
06-11 57° 78° 3279 2181 1183 616 353
06-12 64° 83° 3330 2222 1215 640 372
06-13 60° 75° 3376 2258 1240 657 384
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 58° 63° 3415 2287 1259 668 390
06-15 57° 65° 3454 2316 1278 679 396
06-16 56° 68° 3494 2346 1298 691 403
06-17 59° 64° 3534 2376 1318 703 410
06-18 63° 78° 3582 2414 1347 724 426
06-19 68° 86° 3637 2459 1382 751 448
06-20 66° 80° 3688 2500 1413 774 466
06-21 62° 84° 3740 2542 1444 797 484
06-22 71° 87° 3797 2589 1481 826 508
06-23 74° 93° 3858 2640 1523 860 537
06-24 73° 95° 3921 2693 1565 894 566
06-25 74° 92° 3982 2744 1606 927 594
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 61° 77° 4029 2781 1633 946 608
06-27 60° 69° 4072 2814 1656 961 618
06-28 59° 81° 4120 2852 1684 981 633
06-29 70° 84° 4175 2897 1719 1008 655
06-30 64° 88° 4228 2940 1753 1034 676
07-01 69° 90° 4286 2988 1791 1064 701
07-02 69° 81° 4340 3032 1824 1089 721
07-03 62° 85° 4391 3073 1856 1113 740
07-04 58° 78° 4438 3110 1882 1131 753
07-05 57° 82° 4485 3147 1910 1151 768
07-06 68° 86° 4540 3192 1944 1177 789
07-07 70° 83° 4595 3237 1979 1204 811
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 73° 88° 4653 3285 2018 1235 837
07-09 71° 86° 4710 3332 2054 1263 860
07-10 70° 81° 4763 3375 2088 1289 881
07-11 70° 83° 4818 3420 2123 1316 903
07-12 71° 84° 4873 3465 2158 1343 925
07-13 68° 81° 4926 3508 2191 1368 945
07-14 70° 84° 4981 3553 2226 1395 967
07-15 69° 86° 5037 3599 2262 1423 990
07-16 71° 87° 5094 3646 2299 1452 1014
07-17 76° 87° 5154 3696 2338 1483 1040
07-18 65° 78° 5203 3735 2368 1505 1057
07-19 58° 80° 5250 3772 2395 1524 1071
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 71° 86° 5307 3819 2431 1552 1094
07-21 64° 79° 5356 3858 2461 1574 1111
07-22 57° 76° 5401 3893 2485 1590 1122
07-23 58° 80° 5448 3930 2512 1609 1136
07-24 64° 83° 5500 3972 2544 1633 1155
07-25 72° 91° 5559 4021 2584 1665 1182
07-26 71° 81° 5613 4065 2618 1691 1203
07-27 67° 80° 5665 4107 2649 1714 1221
07-28 69° 89° 5722 4154 2687 1744 1246
07-29 70° 95° 5783 4205 2727 1776 1273
07-30 71° 91° 5842 4254 2766 1807 1299
07-31 63° 77° 5889 4291 2794 1827 1314
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 59° 72° 5933 4325 2817 1842 1324
08-02 55° 76° 5976 4358 2841 1858 1335
08-03 54° 80° 6021 4393 2866 1875 1347
08-04 57° 83° 6069 4431 2894 1895 1362
08-05 62° 81° 6119 4471 2923 1916 1378
08-06 63° 75° 6166 4508 2951 1936 1393
08-07 62° 78° 6215 4547 2979 1956 1408
08-08 55° 80° 6260 4582 3004 1973 1420
08-09 54° 83° 6306 4618 3031 1992 1434
08-10 58° 87° 6357 4659 3061 2014 1451
08-11 63° 88° 6410 4702 3095 2040 1472
08-12 62° 90° 6464 4746 3129 2066 1493
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 69° 89° 6521 4793 3166 2095 1517
08-14 69° 88° 6578 4840 3202 2123 1540
08-15 67° 87° 6633 4885 3237 2150 1562
08-16 70° 82° 6687 4929 3272 2177 1584
08-17 68° 87° 6743 4975 3307 2204 1606
08-18 61° 76° 6789 5011 3333 2222 1619
08-19 55° 75° 6832 5044 3356 2237 1629
08-20 55° 65° 6870 5072 3375 2248 1635
08-21 56° 69° 6910 5102 3395 2260 1642
08-22 53° 80° 6955 5137 3419 2276 1653
08-23 58° 81° 7002 5174 3447 2296 1668
08-24 60° 79° 7050 5212 3474 2315 1682
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 65° 82° 7102 5254 3506 2339 1701
08-26 55° 74° 7145 5287 3529 2354 1711
08-27 53° 72° 7185 5317 3549 2366 1718
08-28 49° 76° 7225 5347 3570 2379 1726
08-29 58° 72° 7269 5381 3593 2394 1736
08-30 49° 73° 7308 5410 3612 2405 1742
08-31 49° 77° 7349 5441 3633 2418 1750
09-01 52° 75° 7390 5472 3655 2432 1759
09-02 53° 78° 7434 5506 3678 2447 1769
09-03 51° 77° 7475 5537 3700 2461 1778
09-04 54° 78° 7519 5571 3724 2477 1789
09-05 62° 79° 7567 5609 3752 2497 1804
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 62° 83° 7618 5650 3782 2519 1821
09-07 56° 69° 7658 5680 3803 2532 1829
09-08 47° 69° 7695 5707 3819 2540 1832
09-09 48° 71° 7732 5734 3836 2549 1836
09-10 55° 71° 7773 5765 3857 2562 1844
09-11 51° 75° 7814 5796 3878 2575 1852
09-12 55° 75° 7857 5829 3902 2591 1863
09-13 57° 77° 7902 5864 3927 2608 1875
09-14 55° 79° 7947 5899 3952 2625 1887
09-15 56° 78° 7993 5935 3977 2642 1899
09-16 58° 73° 8036 5968 4001 2658 1910
09-17 55° 75° 8079 6001 4023 2672 1919
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 55° 81° 8125 6037 4049 2690 1932
09-19 58° 81° 8172 6074 4077 2710 1947
09-20 51° 72° 8212 6104 4096 2721 1953
09-21 48° 69° 8248 6130 4113 2730 1957
09-22 45° 72° 8284 6156 4129 2738 1960
09-23 57° 77° 8329 6191 4154 2755 1972
09-24 67° 74° 8377 6229 4182 2775 1987
09-25 66° 73° 8425 6267 4210 2795 2002
09-26 63° 78° 8474 6306 4238 2815 2017
09-27 56° 76° 8518 6340 4262 2831 2028
09-28 61° 82° 8568 6380 4292 2853 2045
09-29 56° 74° 8610 6412 4315 2868 2055
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 56° 77° 8655 6447 4339 2884 2066
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 15° 34° 3 0 0 0 0
02-16 29° 37° 14 1 0 0 0
02-17 22° 32° 19 1 0 0 0
02-18 17° 35° 23 1 0 0 0
02-19 24° 36° 31 1 0 0 0
02-20 16° 36° 35 1 0 0 0
02-21 17° 36° 39 1 0 0 0
02-22 27° 40° 51 3 0 0 0
02-23 35° 44° 69 11 0 0 0
02-24 24° 36° 77 11 0 0 0
02-25 15° 36° 81 11 0 0 0
02-26 30° 54° 101 21 0 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 31° 54° 122 31 1 0 0
02-28 42° 55° 148 48 7 0 0
02-29 27° 38° 159 49 7 0 0
03-01 23° 44° 170 50 7 0 0
03-02 35° 47° 189 59 7 0 0
03-03 44° 60° 220 79 17 2 0
03-04 39° 55° 245 95 23 2 0
03-05 41° 44° 265 105 23 2 0
03-06 44° 49° 290 120 28 2 0
03-07 40° 51° 313 133 31 2 0
03-08 33° 54° 335 145 33 2 0
03-09 36° 41° 352 151 33 2 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 34° 46° 370 159 33 2 0
03-11 32° 47° 387 167 33 2 0
03-12 37° 62° 414 184 40 2 0
03-13 36° 63° 442 202 48 2 0
03-14 39° 69° 474 224 60 6 0
03-15 46° 65° 508 247 73 12 1
03-16 37° 56° 532 262 78 12 1
03-17 42° 56° 559 279 85 12 1
03-18 35° 45° 577 287 85 12 1
03-19 32° 42° 592 292 85 12 1
03-20 32° 46° 609 299 85 12 1
03-21 27° 37° 619 299 85 12 1
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 23° 40° 629 299 85 12 1
03-23 33° 38° 642 302 85 12 1
03-24 23° 41° 652 303 85 12 1
03-25 28° 51° 670 311 85 12 1
03-26 34° 51° 691 321 85 12 1
03-27 38° 50° 713 333 87 12 1
03-28 40° 46° 734 345 89 12 1
03-29 38° 52° 757 358 92 12 1
03-30 36° 57° 782 372 97 12 1
03-31 39° 59° 809 389 103 12 1
04-01 40° 51° 832 403 107 12 1
04-02 41° 45° 853 414 108 12 1
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 37° 41° 870 421 108 12 1
04-04 33° 42° 886 426 108 12 1
04-05 33° 44° 903 433 108 12 1
04-06 37° 48° 923 444 108 12 1
04-07 37° 55° 947 458 113 12 1
04-08 33° 63° 973 473 118 12 1
04-09 45° 73° 1010 501 136 21 5
04-10 48° 62° 1044 524 149 26 5
04-11 50° 60° 1076 547 162 31 5
04-12 52° 62° 1111 572 176 38 7
04-13 46° 52° 1138 588 183 38 7
04-14 42° 64° 1169 609 194 41 7
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 49° 73° 1208 638 213 52 13
04-16 44° 65° 1240 660 225 56 13
04-17 44° 57° 1268 678 233 56 13
04-18 42° 45° 1290 690 235 56 13
04-19 42° 55° 1316 707 242 56 13
04-20 45° 63° 1349 729 254 60 13
04-21 34° 46° 1367 737 254 60 13
04-22 34° 57° 1390 751 257 60 13
04-23 35° 61° 1416 767 263 60 13
04-24 46° 67° 1450 791 277 66 14
04-25 37° 56° 1475 805 282 66 14
04-26 33° 61° 1500 820 287 66 14
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 36° 59° 1525 836 292 66 14
04-28 46° 72° 1563 863 310 76 18
04-29 58° 82° 1611 902 338 96 34
04-30 52° 60° 1645 925 352 102 34
05-01 52° 72° 1685 955 372 114 41
05-02 50° 79° 1727 988 394 128 51
05-03 50° 62° 1761 1011 408 134 51
05-04 46° 61° 1793 1033 420 138 51
05-05 46° 49° 1819 1049 426 138 51
05-06 49° 72° 1857 1077 444 148 57
05-07 51° 77° 1899 1109 466 162 66
05-08 57° 83° 1947 1147 494 182 81
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 56° 64° 1985 1175 512 192 86
05-10 47° 56° 2014 1195 521 193 86
05-11 43° 60° 2044 1214 531 195 86
05-12 46° 54° 2072 1232 539 195 86
05-13 43° 66° 2104 1254 551 199 86
05-14 49° 74° 2144 1284 571 211 93
05-15 58° 64° 2183 1313 590 222 99
05-16 58° 62° 2221 1341 608 232 104
05-17 55° 71° 2262 1372 629 245 112
05-18 54° 70° 2302 1402 649 257 119
05-19 56° 72° 2344 1434 671 271 128
05-20 52° 77° 2386 1466 693 285 137
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 55° 86° 2434 1504 721 305 152
05-22 61° 84° 2485 1545 752 328 170
05-23 65° 78° 2534 1584 781 349 186
05-24 58° 82° 2582 1622 809 369 201
05-25 56° 76° 2626 1656 833 385 212
05-26 61° 81° 2675 1695 862 406 228
05-27 65° 73° 2722 1732 889 425 242
05-28 61° 77° 2769 1770 916 444 256
05-29 55° 72° 2811 1801 938 458 265
05-30 52° 66° 2848 1829 955 467 269
05-31 50° 72° 2887 1857 974 478 275
06-01 51° 79° 2930 1890 997 493 285
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 54° 79° 2975 1925 1022 510 297
06-03 62° 82° 3025 1965 1052 532 313
06-04 60° 78° 3071 2002 1078 550 327
06-05 58° 77° 3117 2037 1104 568 340
06-06 68° 77° 3167 2078 1134 591 357
06-07 60° 78° 3214 2115 1161 609 371
06-08 56° 74° 3257 2147 1184 624 381
06-09 57° 70° 3299 2179 1206 638 390
06-10 54° 70° 3339 2209 1226 650 397
06-11 52° 68° 3377 2237 1244 660 402
06-12 52° 72° 3417 2267 1264 672 409
06-13 53° 83° 3463 2303 1290 690 422
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 63° 77° 3511 2341 1318 710 436
06-15 58° 77° 3556 2376 1343 727 449
06-16 52° 76° 3598 2408 1365 741 458
06-17 56° 83° 3645 2446 1392 761 472
06-18 68° 87° 3701 2492 1428 788 495
06-19 68° 89° 3758 2538 1465 817 519
06-20 68° 91° 3816 2586 1503 847 544
06-21 70° 90° 3874 2634 1541 877 569
06-22 70° 88° 3931 2682 1578 906 593
06-23 70° 88° 3988 2729 1615 935 617
06-24 72° 76° 4040 2771 1647 959 636
06-25 64° 85° 4093 2813 1680 984 656
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 68° 88° 4149 2859 1716 1012 679
06-27 65° 80° 4199 2900 1746 1034 696
06-28 54° 74° 4241 2931 1768 1048 705
06-29 60° 77° 4288 2968 1795 1067 719
06-30 68° 82° 4341 3012 1828 1092 739
07-01 58° 76° 4386 3047 1853 1110 751
07-02 56° 79° 4432 3082 1879 1127 764
07-03 60° 80° 4480 3121 1907 1147 779
07-04 65° 82° 4532 3162 1939 1171 798
07-05 71° 85° 4588 3208 1975 1199 821
07-06 72° 87° 4646 3256 2013 1229 846
07-07 72° 87° 4704 3304 2051 1259 870
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 69° 89° 4760 3351 2087 1287 894
07-09 72° 90° 4819 3399 2126 1318 920
07-10 76° 87° 4878 3449 2165 1349 946
07-11 74° 84° 4935 3496 2202 1378 970
07-12 67° 84° 4989 3539 2236 1404 991
07-13 73° 86° 5046 3587 2273 1433 1015
07-14 69° 87° 5102 3633 2309 1461 1038
07-15 73° 88° 5161 3681 2348 1492 1064
07-16 69° 91° 5219 3729 2386 1522 1089
07-17 71° 88° 5276 3776 2423 1551 1113
07-18 69° 81° 5329 3819 2456 1576 1133
07-19 60° 78° 5376 3857 2483 1595 1147
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 60° 82° 5425 3895 2512 1616 1163
07-21 69° 82° 5479 3939 2546 1642 1184
07-22 65° 81° 5530 3980 2577 1665 1202
07-23 67° 75° 5579 4019 2606 1686 1218
07-24 70° 78° 5631 4061 2638 1710 1237
07-25 66° 79° 5682 4102 2669 1733 1254
07-26 60° 79° 5729 4140 2696 1753 1269
07-27 58° 81° 5777 4177 2724 1772 1284
07-28 60° 82° 5826 4216 2753 1793 1300
07-29 65° 80° 5876 4256 2783 1815 1317
07-30 68° 85° 5930 4301 2817 1841 1338
07-31 73° 82° 5986 4346 2853 1869 1361
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 69° 89° 6043 4393 2890 1898 1385
08-02 70° 86° 6099 4439 2926 1926 1408
08-03 72° 87° 6156 4486 2963 1955 1432
08-04 71° 79° 6209 4530 2996 1980 1452
08-05 67° 86° 6264 4574 3031 2007 1474
08-06 69° 82° 6317 4618 3064 2032 1494
08-07 61° 68° 6360 4650 3087 2047 1504
08-08 62° 66° 6402 4683 3109 2061 1513
08-09 66° 79° 6453 4723 3140 2084 1531
08-10 70° 82° 6507 4767 3174 2110 1552
08-11 61° 77° 6554 4804 3201 2129 1566
08-12 57° 75° 6598 4838 3225 2145 1577
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 57° 78° 6643 4873 3250 2162 1589
08-14 59° 80° 6691 4911 3278 2182 1604
08-15 60° 82° 6740 4950 3307 2203 1620
08-16 63° 82° 6790 4990 3337 2225 1637
08-17 67° 76° 6840 5030 3367 2247 1654
08-18 66° 72° 6887 5067 3394 2266 1668
08-19 66° 78° 6937 5107 3424 2288 1685
08-20 56° 68° 6977 5138 3444 2300 1692
08-21 51° 69° 7015 5166 3462 2311 1697
08-22 52° 72° 7055 5196 3482 2322 1704
08-23 53° 77° 7099 5229 3506 2338 1715
08-24 57° 80° 7145 5265 3532 2356 1728
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 58° 82° 7193 5304 3560 2376 1743
08-26 61° 82° 7243 5343 3590 2398 1760
08-27 60° 83° 7292 5383 3619 2419 1776
08-28 69° 88° 7349 5429 3656 2448 1799
08-29 66° 75° 7397 5467 3684 2468 1815
08-30 60° 71° 7441 5501 3708 2484 1826
08-31 63° 76° 7488 5538 3735 2503 1840
09-01 69° 78° 7540 5580 3767 2527 1858
09-02 59° 74° 7584 5614 3791 2543 1870
09-03 48° 70° 7621 5642 3808 2552 1874
09-04 49° 75° 7661 5671 3828 2564 1881
09-05 51° 74° 7701 5702 3848 2576 1888
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 53° 76° 7743 5734 3870 2590 1897
09-07 55° 70° 7784 5764 3891 2603 1905
09-08 49° 66° 7819 5789 3906 2610 1907
09-09 47° 71° 7856 5816 3923 2619 1911
09-10 54° 75° 7898 5849 3945 2634 1920
09-11 49° 75° 7938 5879 3965 2645 1927
09-12 50° 78° 7981 5911 3988 2660 1937
09-13 54° 80° 8026 5946 4013 2677 1949
09-14 57° 81° 8073 5983 4040 2696 1963
09-15 59° 78° 8120 6020 4067 2715 1976
09-16 51° 78° 8162 6052 4089 2729 1986
09-17 55° 78° 8206 6087 4113 2746 1997
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 59° 73° 8250 6120 4137 2761 2008
09-19 57° 82° 8298 6158 4165 2781 2023
09-20 60° 76° 8343 6194 4190 2799 2035
09-21 57° 73° 8386 6226 4213 2813 2045
09-22 51° 71° 8425 6256 4232 2824 2051
09-23 53° 63° 8461 6282 4248 2832 2054
09-24 51° 65° 8497 6307 4264 2840 2057
09-25 55° 62° 8533 6334 4280 2849 2060
09-26 59° 69° 8575 6366 4302 2862 2069
09-27 63° 73° 8621 6401 4328 2880 2082
09-28 59° 69° 8663 6433 4350 2894 2091
09-29 58° 61° 8701 6461 4368 2904 2096
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 56° 73° 8743 6493 4390 2918 2105

 

Latest Updates

February 15th, 2025Welcome to the 2025 GDD Tracking Season

Although winter seems very much entrenched in the Great Lakes region with snow and frigid temperatures in the forecast, GDDTracker starts counting on February 15. Spring is when GDDTracker receives the most attention for alerting turfgrass managers of optimal application timing windows for suppressing annual bluegrass seedheads and crabgrass preemergence applications. Beyond the spring models, there are several models that may be helpful throughout the season including the early season dollar spot DMI timer and the Smith-Kerns dollar spot prediction model. To learn about all the available models, click on the "About" tab at the top of the screen. Thanks for your continued support and use of GDDTracker and best wishes for a successful 2025!
 

March 18th, 2024Timing crabgrass preemergence applications in spring

Don't miss this update from from Kevin Frank regarding timing of crabgrass preemergence herbicides.


 

 

© Copyright 2004-2026, Department of Crop and Soil Sciences, Michigan State University.
Weather data and programming assistance provided by Enviro-Weather and NWS
All Rights Reserved. Custom web development by Dynamite Inc.