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.

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MSU Proxy/Primo Seedhead Timer (GDD 32)
through Sun, Dec. 14. 2025

 
  

Mays Landing, NJ

        

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 25° 42° 11 1 0 0 0
02-16 38° 63° 40 20 9 1 0
02-17 30° 38° 52 22 9 1 0
02-18 22° 30° 56 22 9 1 0
02-19 16° 28° 56 22 9 1 0
02-20 18° 28° 57 22 9 1 0
02-21 23° 37° 65 22 9 1 0
02-22 20° 41° 74 22 9 1 0
02-23 27° 49° 90 28 9 1 0
02-24 30° 54° 110 38 9 1 0
02-25 39° 63° 139 57 18 2 0
02-26 38° 62° 167 75 26 2 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 44° 61° 198 96 37 5 0
02-28 38° 53° 222 110 40 5 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 33° 67° 250 128 48 5 0
03-02 21° 36° 256 128 48 5 0
03-03 22° 40° 266 128 48 5 0
03-04 27° 60° 287 139 50 5 0
03-05 48° 62° 320 162 63 10 0
03-06 35° 57° 344 177 67 10 0
03-07 33° 49° 364 186 67 10 0
03-08 34° 49° 383 195 67 10 0
03-09 30° 55° 404 206 68 10 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 38° 64° 432 225 76 10 0
03-11 33° 67° 461 243 84 11 0
03-12 41° 57° 487 260 91 11 0
03-13 38° 49° 509 271 93 11 0
03-14 41° 55° 535 287 99 11 0
03-15 42° 54° 560 303 104 11 0
03-16 49° 67° 596 329 120 19 3
03-17 40° 64° 626 349 130 21 3
03-18 33° 61° 651 363 135 21 3
03-19 33° 68° 679 382 143 21 3
03-20 44° 64° 711 404 155 25 3
03-21 40° 54° 736 419 160 25 3
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 37° 65° 765 438 169 26 3
03-23 33° 51° 785 447 169 26 3
03-24 40° 56° 811 463 176 26 3
03-25 43° 60° 841 483 185 27 3
03-26 40° 54° 865 498 190 27 3
03-27 31° 52° 885 507 190 27 3
03-28 37° 66° 915 527 199 29 3
03-29 56° 73° 957 559 222 43 12
03-30 45° 68° 992 584 236 50 14
03-31 60° 80° 1040 622 264 70 29
04-01 43° 62° 1070 642 275 73 29
04-02 33° 53° 1091 653 276 73 29
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 46° 77° 1130 683 295 84 36
04-04 59° 73° 1175 717 320 101 47
04-05 50° 59° 1207 740 332 105 47
04-06 48° 55° 1237 760 342 107 47
04-07 42° 53° 1263 775 348 107 47
04-08 38° 48° 1284 786 349 107 47
04-09 31° 51° 1303 795 349 107 47
04-10 35° 52° 1325 807 351 107 47
04-11 42° 46° 1347 819 352 107 47
04-12 38° 42° 1365 827 352 107 47
04-13 39° 59° 1392 844 359 107 47
04-14 39° 65° 1422 864 370 109 47
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 50° 67° 1458 891 386 118 51
04-16 43° 57° 1487 909 394 118 51
04-17 36° 62° 1514 926 401 118 51
04-18 36° 68° 1544 946 411 120 51
04-19 64° 84° 1596 988 443 144 70
04-20 52° 74° 1637 1019 465 157 78
04-21 47° 65° 1671 1043 479 163 79
04-22 60° 81° 1719 1081 507 184 94
04-23 54° 74° 1761 1113 529 198 103
04-24 47° 76° 1801 1143 548 209 109
04-25 47° 75° 1840 1172 568 220 116
04-26 57° 76° 1885 1207 592 237 127
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 47° 70° 1921 1233 609 246 131
04-28 44° 75° 1958 1261 626 255 135
04-29 46° 78° 1998 1291 646 267 142
04-30 61° 80° 2047 1329 675 288 158
05-01 50° 76° 2088 1361 696 301 166
05-02 62° 85° 2140 1402 727 324 185
05-03 64° 84° 2192 1444 759 348 203
05-04 63° 69° 2236 1478 783 364 214
05-05 60° 70° 2278 1510 806 379 224
05-06 61° 78° 2326 1548 833 398 239
05-07 55° 74° 2368 1581 856 413 248
05-08 55° 78° 2413 1615 881 429 260
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 52° 67° 2450 1643 898 439 264
05-10 48° 73° 2489 1671 917 449 270
05-11 51° 82° 2533 1705 941 466 281
05-12 54° 80° 2578 1740 966 482 293
05-13 61° 68° 2620 1773 988 497 302
05-14 59° 67° 2661 1804 1009 510 310
05-15 62° 73° 2707 1839 1034 527 323
05-16 61° 74° 2752 1875 1060 545 335
05-17 64° 84° 2804 1917 1092 569 354
05-18 60° 76° 2850 1952 1118 587 367
05-19 57° 72° 2893 1985 1141 601 377
05-20 47° 65° 2927 2009 1155 607 378
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 52° 56° 2959 2031 1167 612 378
05-22 51° 57° 2991 2053 1179 616 378
05-23 50° 66° 3027 2079 1195 624 381
05-24 49° 65° 3062 2104 1210 631 383
05-25 49° 69° 3099 2131 1227 639 387
05-26 47° 70° 3135 2158 1243 648 390
05-27 48° 71° 3173 2185 1260 657 394
05-28 52° 59° 3206 2208 1274 663 395
05-29 58° 71° 3249 2241 1296 677 404
05-30 59° 76° 3294 2276 1322 694 417
05-31 57° 72° 3337 2309 1344 709 426
06-01 49° 68° 3374 2336 1361 718 430
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 48° 72° 3411 2364 1379 728 435
06-03 51° 79° 3455 2397 1402 743 445
06-04 55° 84° 3502 2434 1430 763 460
06-05 61° 83° 3552 2474 1460 785 477
06-06 63° 80° 3601 2514 1489 806 493
06-07 68° 79° 3653 2555 1521 829 512
06-08 62° 69° 3696 2588 1544 845 522
06-09 62° 72° 3741 2623 1569 862 534
06-10 62° 81° 3791 2663 1599 884 551
06-11 65° 83° 3843 2705 1631 908 570
06-12 64° 88° 3897 2749 1665 934 591
06-13 67° 78° 3948 2790 1695 956 608
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 61° 70° 3991 2823 1719 972 619
06-15 59° 63° 4030 2853 1738 983 625
06-16 60° 66° 4072 2884 1759 996 633
06-17 61° 76° 4118 2920 1786 1015 647
06-18 68° 86° 4173 2965 1821 1041 669
06-19 71° 91° 4232 3014 1860 1072 695
06-20 66° 84° 4285 3057 1892 1097 714
06-21 69° 89° 4342 3104 1929 1126 738
06-22 72° 86° 4399 3151 1967 1155 763
06-23 77° 97° 4464 3206 2012 1192 795
06-24 78° 99° 4530 3262 2058 1231 828
06-25 78° 98° 4596 3318 2104 1269 861
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 67° 87° 4651 3363 2139 1296 883
06-27 65° 69° 4696 3398 2164 1313 895
06-28 65° 88° 4751 3443 2199 1340 917
06-29 75° 94° 4813 3495 2241 1374 946
06-30 76° 88° 4873 3545 2281 1406 973
07-01 76° 90° 4934 3596 2322 1438 1001
07-02 71° 82° 4988 3641 2356 1465 1022
07-03 70° 90° 5046 3689 2394 1495 1047
07-04 64° 84° 5098 3731 2426 1519 1066
07-05 60° 85° 5149 3771 2457 1541 1084
07-06 63° 87° 5202 3814 2489 1566 1103
07-07 74° 89° 5262 3864 2529 1598 1130
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 75° 95° 5324 3917 2572 1633 1160
07-09 73° 89° 5383 3966 2611 1664 1186
07-10 71° 76° 5435 4007 2643 1687 1205
07-11 71° 84° 5491 4053 2678 1715 1227
07-12 70° 84° 5546 4098 2714 1742 1250
07-13 72° 87° 5603 4145 2751 1772 1274
07-14 72° 87° 5660 4193 2788 1801 1298
07-15 73° 85° 5717 4240 2825 1830 1322
07-16 74° 89° 5777 4289 2865 1861 1349
07-17 74° 91° 5838 4340 2906 1894 1377
07-18 75° 85° 5896 4388 2943 1924 1401
07-19 73° 80° 5950 4433 2978 1951 1423
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 73° 88° 6009 4481 3017 1981 1449
07-21 71° 85° 6065 4527 3053 2010 1472
07-22 65° 83° 6117 4570 3085 2034 1491
07-23 66° 81° 6169 4611 3117 2057 1510
07-24 63° 86° 6221 4653 3149 2082 1529
07-25 70° 95° 6281 4704 3189 2114 1556
07-26 73° 84° 6338 4750 3226 2143 1580
07-27 70° 88° 6395 4797 3263 2171 1604
07-28 74° 91° 6455 4848 3303 2204 1631
07-29 74° 94° 6517 4899 3345 2238 1660
07-30 74° 94° 6579 4952 3387 2272 1689
07-31 73° 91° 6640 5002 3427 2304 1716
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 64° 74° 6687 5039 3455 2323 1731
08-02 59° 77° 6733 5075 3480 2341 1743
08-03 57° 79° 6779 5111 3507 2360 1757
08-04 57° 84° 6828 5150 3535 2380 1772
08-05 61° 80° 6876 5188 3564 2401 1788
08-06 68° 79° 6927 5230 3595 2424 1806
08-07 65° 78° 6977 5269 3625 2445 1823
08-08 58° 78° 7023 5305 3651 2464 1836
08-09 54° 80° 7068 5341 3676 2481 1848
08-10 56° 84° 7116 5378 3704 2501 1863
08-11 59° 86° 7166 5418 3734 2523 1880
08-12 64° 86° 7219 5461 3767 2548 1900
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 70° 89° 7277 5509 3804 2577 1924
08-14 73° 87° 7335 5557 3842 2607 1949
08-15 69° 86° 7390 5602 3878 2635 1972
08-16 71° 82° 7445 5647 3912 2661 1993
08-17 68° 88° 7501 5693 3948 2689 2016
08-18 66° 74° 7549 5731 3977 2709 2032
08-19 65° 72° 7596 5768 4003 2728 2045
08-20 66° 75° 7644 5806 4032 2749 2061
08-21 64° 71° 7690 5842 4057 2766 2073
08-22 58° 78° 7735 5878 4083 2784 2086
08-23 55° 80° 7781 5913 4109 2801 2099
08-24 60° 81° 7829 5952 4137 2822 2114
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 64° 85° 7882 5994 4169 2846 2133
08-26 56° 77° 7926 6029 4194 2863 2145
08-27 57° 74° 7970 6062 4218 2879 2156
08-28 51° 77° 8012 6094 4240 2893 2165
08-29 59° 78° 8059 6131 4266 2911 2178
08-30 52° 74° 8099 6162 4287 2924 2186
08-31 51° 75° 8140 6193 4308 2937 2194
09-01 54° 75° 8183 6225 4331 2952 2204
09-02 54° 75° 8225 6258 4353 2966 2213
09-03 54° 77° 8269 6291 4376 2981 2223
09-04 55° 80° 8314 6326 4402 2999 2236
09-05 66° 86° 8368 6370 4436 3024 2257
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 70° 89° 8425 6417 4473 3053 2281
09-07 62° 71° 8469 6451 4497 3070 2292
09-08 53° 72° 8510 6482 4517 3082 2299
09-09 51° 71° 8549 6511 4536 3093 2305
09-10 63° 67° 8592 6544 4560 3109 2316
09-11 57° 78° 8638 6580 4585 3126 2328
09-12 54° 78° 8682 6614 4609 3142 2339
09-13 57° 79° 8728 6650 4635 3160 2352
09-14 58° 79° 8774 6687 4662 3179 2366
09-15 58° 77° 8820 6722 4688 3197 2379
09-16 62° 71° 8864 6757 4712 3213 2390
09-17 65° 67° 8909 6791 4737 3229 2402
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 64° 78° 8958 6830 4766 3250 2418
09-19 61° 87° 9010 6872 4797 3274 2436
09-20 60° 72° 9054 6906 4821 3290 2447
09-21 55° 73° 9095 6938 4843 3304 2456
09-22 50° 77° 9137 6969 4865 3318 2465
09-23 60° 84° 9187 7010 4895 3340 2482
09-24 64° 80° 9237 7049 4925 3362 2499
09-25 71° 81° 9291 7094 4959 3388 2520
09-26 67° 82° 9344 7136 4992 3413 2540
09-27 62° 79° 9392 7175 5020 3433 2555
09-28 64° 79° 9442 7214 5050 3455 2572
09-29 62° 75° 9489 7251 5077 3474 2586
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 62° 78° 9537 7290 5105 3494 2601
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 28° 40° 12 2 0 0 0
02-16 34° 45° 29 9 0 0 0
02-17 30° 36° 40 10 0 0 0
02-18 26° 43° 53 13 0 0 0
02-19 28° 46° 68 18 0 0 0
02-20 26° 43° 80 20 0 0 0
02-21 29° 43° 94 24 0 0 0
02-22 27° 47° 109 29 0 0 0
02-23 39° 53° 133 43 4 0 0
02-24 30° 44° 149 49 4 0 0
02-25 25° 41° 159 49 4 0 0
02-26 30° 59° 182 62 7 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 38° 65° 212 82 16 1 0
02-28 48° 66° 247 107 31 8 2
02-29 32° 46° 263 113 31 8 2
03-01 26° 46° 278 118 31 8 2
03-02 40° 56° 303 133 37 8 2
03-03 44° 65° 336 156 50 13 2
03-04 42° 62° 366 176 60 15 2
03-05 43° 51° 391 191 65 15 2
03-06 48° 49° 418 208 71 15 2
03-07 49° 57° 449 229 82 18 2
03-08 39° 53° 472 242 86 18 2
03-09 40° 56° 498 258 92 18 2
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 36° 54° 521 271 94 18 2
03-11 36° 53° 543 283 97 18 2
03-12 39° 67° 574 304 108 21 2
03-13 42° 72° 609 329 123 28 4
03-14 44° 75° 647 357 140 38 9
03-15 55° 74° 689 389 163 52 18
03-16 44° 60° 719 409 173 54 18
03-17 47° 65° 753 433 186 60 19
03-18 39° 54° 778 448 191 60 19
03-19 35° 47° 796 456 191 60 19
03-20 39° 63° 825 475 200 61 19
03-21 30° 44° 840 480 200 61 19
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 29° 47° 856 486 200 61 19
03-23 36° 57° 880 500 204 61 19
03-24 30° 46° 897 507 204 61 19
03-25 32° 49° 915 515 204 61 19
03-26 36° 51° 936 526 205 61 19
03-27 42° 49° 960 540 208 61 19
03-28 44° 50° 985 555 214 61 19
03-29 39° 55° 1010 570 219 61 19
03-30 36° 59° 1035 585 224 61 19
03-31 43° 62° 1066 606 235 63 19
04-01 45° 50° 1092 622 241 63 19
04-02 43° 47° 1115 635 243 63 19
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 45° 48° 1139 649 248 63 19
04-04 40° 52° 1163 663 252 63 19
04-05 39° 51° 1186 676 255 63 19
04-06 37° 54° 1210 690 258 63 19
04-07 38° 57° 1235 705 264 63 19
04-08 32° 65° 1261 721 270 63 19
04-09 42° 75° 1298 748 287 72 23
04-10 51° 73° 1339 779 308 84 30
04-11 54° 70° 1379 809 328 96 37
04-12 56° 67° 1418 838 347 108 44
04-13 50° 63° 1453 863 362 114 45
04-14 41° 73° 1487 887 376 121 47
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 59° 78° 1534 924 403 140 60
04-16 53° 71° 1574 954 423 152 67
04-17 47° 68° 1609 979 438 159 70
04-18 48° 55° 1639 999 448 161 70
04-19 45° 55° 1667 1017 456 161 70
04-20 48° 69° 1704 1044 473 170 74
04-21 43° 53° 1730 1060 479 170 74
04-22 35° 61° 1756 1076 484 170 74
04-23 37° 64° 1784 1094 493 170 74
04-24 47° 71° 1821 1121 510 179 78
04-25 41° 57° 1848 1138 517 179 78
04-26 33° 60° 1873 1153 522 179 78
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 37° 58° 1898 1168 527 179 78
04-28 51° 79° 1941 1201 550 194 88
04-29 59° 87° 1992 1242 581 217 106
04-30 62° 83° 2043 1283 612 240 124
05-01 58° 79° 2089 1319 638 258 137
05-02 53° 87° 2137 1357 666 278 152
05-03 50° 68° 2174 1384 683 287 156
05-04 47° 57° 2204 1404 693 289 156
05-05 50° 64° 2239 1429 708 296 158
05-06 59° 73° 2283 1463 732 312 169
05-07 63° 79° 2332 1502 761 333 185
05-08 65° 87° 2386 1546 795 359 206
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 57° 73° 2429 1579 818 374 216
05-10 47° 58° 2460 1600 829 377 216
05-11 44° 61° 2490 1620 839 380 216
05-12 45° 55° 2518 1638 847 380 216
05-13 39° 69° 2550 1660 859 384 216
05-14 50° 75° 2591 1691 880 396 224
05-15 59° 62° 2629 1719 898 407 230
05-16 60° 65° 2670 1750 919 419 237
05-17 57° 67° 2710 1780 939 431 244
05-18 56° 66° 2749 1809 958 442 250
05-19 55° 72° 2791 1841 979 456 259
05-20 52° 71° 2830 1870 999 467 265
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 54° 81° 2875 1905 1024 485 277
05-22 57° 84° 2924 1944 1053 505 293
05-23 65° 80° 2974 1984 1083 528 310
05-24 65° 84° 3027 2027 1116 552 330
05-25 62° 85° 3078 2068 1147 576 348
05-26 65° 85° 3131 2111 1180 601 368
05-27 68° 76° 3182 2152 1210 623 386
05-28 66° 81° 3233 2193 1242 646 404
05-29 58° 78° 3279 2229 1267 664 417
05-30 58° 73° 3322 2262 1291 680 427
05-31 55° 74° 3365 2295 1314 694 437
06-01 51° 80° 3408 2328 1337 710 448
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 56° 81° 3455 2365 1364 728 461
06-03 68° 84° 3509 2409 1398 754 482
06-04 64° 80° 3559 2449 1428 777 499
06-05 64° 81° 3610 2490 1458 799 517
06-06 70° 86° 3666 2536 1494 827 540
06-07 67° 86° 3720 2580 1529 853 561
06-08 59° 81° 3768 2618 1557 874 576
06-09 63° 80° 3818 2658 1587 895 593
06-10 59° 78° 3864 2694 1613 914 606
06-11 60° 73° 3909 2729 1637 930 618
06-12 56° 79° 3954 2764 1663 947 630
06-13 59° 83° 4002 2802 1691 968 646
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 67° 88° 4058 2848 1726 995 668
06-15 63° 82° 4108 2888 1757 1018 685
06-16 56° 80° 4154 2924 1783 1036 698
06-17 60° 83° 4204 2964 1813 1057 715
06-18 67° 86° 4258 3008 1847 1083 736
06-19 64° 85° 4310 3050 1879 1108 756
06-20 64° 87° 4364 3094 1913 1133 776
06-21 66° 90° 4420 3140 1949 1161 799
06-22 70° 94° 4480 3190 1989 1194 826
06-23 74° 94° 4542 3242 2031 1228 856
06-24 77° 83° 4601 3291 2070 1258 881
06-25 68° 88° 4656 3336 2105 1286 904
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 71° 92° 4716 3386 2144 1317 930
06-27 70° 86° 4771 3431 2180 1345 953
06-28 65° 76° 4820 3470 2209 1365 968
06-29 65° 83° 4872 3512 2241 1389 987
06-30 72° 85° 4929 3559 2278 1418 1011
07-01 64° 81° 4979 3599 2308 1440 1028
07-02 62° 82° 5029 3639 2338 1462 1045
07-03 61° 81° 5077 3677 2366 1483 1061
07-04 66° 87° 5132 3722 2401 1509 1082
07-05 73° 92° 5193 3773 2441 1542 1110
07-06 76° 95° 5256 3826 2485 1577 1140
07-07 75° 91° 5317 3877 2526 1610 1168
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 75° 92° 5378 3928 2567 1644 1197
07-09 76° 91° 5440 3980 2609 1677 1225
07-10 77° 87° 5500 4030 2649 1709 1252
07-11 76° 89° 5560 4080 2689 1742 1279
07-12 75° 79° 5615 4125 2724 1769 1301
07-13 74° 86° 5673 4173 2762 1799 1326
07-14 72° 91° 5733 4223 2802 1830 1353
07-15 75° 94° 5795 4275 2844 1865 1382
07-16 78° 95° 5860 4330 2889 1901 1414
07-17 74° 93° 5921 4381 2930 1935 1442
07-18 75° 88° 5981 4431 2970 1966 1469
07-19 67° 85° 6035 4475 3004 1993 1490
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 65° 83° 6088 4518 3036 2017 1510
07-21 67° 84° 6141 4561 3070 2043 1531
07-22 70° 82° 6195 4605 3104 2069 1551
07-23 72° 86° 6252 4652 3141 2098 1575
07-24 74° 81° 6308 4698 3177 2125 1598
07-25 74° 83° 6365 4745 3213 2154 1622
07-26 65° 83° 6417 4787 3246 2178 1641
07-27 63° 83° 6468 4828 3277 2202 1660
07-28 62° 85° 6520 4870 3309 2225 1678
07-29 68° 83° 6574 4914 3342 2251 1699
07-30 72° 83° 6629 4959 3378 2279 1722
07-31 74° 89° 6689 5009 3418 2310 1748
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 73° 94° 6750 5060 3459 2344 1776
08-02 76° 94° 6813 5113 3502 2378 1806
08-03 75° 92° 6875 5165 3544 2412 1835
08-04 73° 84° 6931 5211 3580 2440 1858
08-05 72° 91° 6990 5260 3619 2472 1885
08-06 76° 92° 7052 5312 3661 2506 1914
08-07 70° 78° 7104 5354 3693 2530 1932
08-08 70° 79° 7156 5396 3725 2554 1952
08-09 75° 86° 7215 5445 3764 2584 1977
08-10 74° 87° 7273 5493 3802 2615 2002
08-11 68° 82° 7326 5536 3835 2640 2022
08-12 61° 83° 7376 5576 3865 2662 2039
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 61° 82° 7426 5616 3895 2683 2056
08-14 62° 84° 7477 5657 3926 2706 2074
08-15 63° 86° 7529 5699 3958 2731 2093
08-16 65° 86° 7583 5743 3991 2756 2114
08-17 68° 78° 7634 5784 4023 2779 2132
08-18 72° 84° 7690 5830 4059 2807 2155
08-19 69° 87° 7746 5876 4094 2835 2178
08-20 60° 72° 7789 5909 4118 2851 2189
08-21 54° 74° 7831 5941 4140 2865 2198
08-22 53° 77° 7874 5974 4163 2880 2207
08-23 54° 82° 7920 6010 4189 2898 2220
08-24 55° 83° 7967 6047 4216 2917 2235
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 58° 84° 8017 6087 4246 2938 2251
08-26 62° 85° 8068 6128 4277 2961 2269
08-27 63° 86° 8121 6171 4310 2986 2289
08-28 69° 96° 8181 6221 4350 3019 2316
08-29 70° 80° 8234 6264 4383 3044 2336
08-30 66° 73° 8282 6302 4411 3063 2351
08-31 67° 81° 8334 6344 4443 3088 2370
09-01 70° 84° 8389 6389 4478 3115 2392
09-02 66° 80° 8440 6430 4509 3138 2410
09-03 55° 74° 8483 6463 4532 3152 2420
09-04 50° 76° 8523 6493 4552 3165 2428
09-05 53° 76° 8566 6526 4575 3179 2437
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 65° 72° 8612 6562 4601 3197 2450
09-07 60° 83° 8661 6601 4630 3219 2466
09-08 53° 72° 8702 6632 4651 3231 2474
09-09 46° 77° 8741 6661 4670 3243 2480
09-10 55° 82° 8788 6698 4696 3261 2494
09-11 57° 81° 8835 6735 4724 3280 2508
09-12 54° 80° 8880 6770 4749 3297 2520
09-13 59° 81° 8928 6808 4777 3317 2535
09-14 60° 82° 8977 6847 4806 3338 2551
09-15 60° 79° 9024 6884 4833 3358 2565
09-16 58° 74° 9068 6918 4857 3374 2577
09-17 68° 77° 9119 6959 4888 3396 2594
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 69° 76° 9169 6999 4918 3418 2611
09-19 65° 83° 9221 7041 4950 3442 2630
09-20 60° 80° 9269 7079 4978 3463 2645
09-21 59° 80° 9317 7117 5006 3482 2660
09-22 58° 75° 9361 7151 5030 3499 2672
09-23 54° 68° 9400 7180 5049 3510 2678
09-24 60° 68° 9443 7213 5071 3524 2687
09-25 62° 69° 9486 7246 5095 3540 2697
09-26 66° 80° 9537 7287 5126 3563 2716
09-27 68° 72° 9586 7326 5154 3583 2731
09-28 68° 76° 9635 7365 5184 3605 2747
09-29 64° 70° 9680 7400 5209 3622 2759
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 62° 72° 9725 7435 5234 3639 2771

 

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.


 

 

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