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.

   
       

MSU Poa Seedhead Flush (GDD 22)
through Tue, Dec. 9. 2025

 
  

Auburn Hills, MI

        

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 20° 32° 4 0 0 0 0
02-16 21° 29° 6 0 0 0 0
02-17 9° 20° 6 0 0 0 0
02-18 4° 16° 6 0 0 0 0
02-19 3° 17° 6 0 0 0 0
02-20 13° 22° 6 0 0 0 0
02-21 20° 30° 10 0 0 0 0
02-22 19° 30° 12 0 0 0 0
02-23 25° 36° 21 0 0 0 0
02-24 32° 50° 40 9 0 0 0
02-25 39° 54° 65 24 5 0 0
02-26 29° 41° 78 27 5 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 43° 94 33 5 0 0
02-28 30° 54° 114 44 5 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 21° 38° 122 44 5 0 0
03-02 18° 29° 123 44 5 0 0
03-03 22° 39° 132 44 5 0 0
03-04 34° 48° 151 53 5 0 0
03-05 38° 55° 176 67 10 0 0
03-06 27° 35° 184 67 10 0 0
03-07 28° 39° 196 69 10 0 0
03-08 21° 37° 203 69 10 0 0
03-09 32° 55° 225 81 11 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 35° 64° 253 99 19 0 0
03-11 31° 58° 275 111 22 0 0
03-12 29° 46° 291 117 22 0 0
03-13 28° 57° 311 127 22 0 0
03-14 34° 70° 341 147 32 2 0
03-15 53° 73° 382 178 53 15 8
03-16 32° 58° 405 191 56 15 8
03-17 27° 45° 419 195 56 15 8
03-18 34° 67° 447 213 65 15 8
03-19 53° 72° 488 244 85 28 16
03-20 32° 60° 513 258 90 28 16
03-21 26° 52° 530 266 90 28 16
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 28° 48° 546 272 90 28 16
03-23 22° 38° 554 272 90 28 16
03-24 35° 42° 571 278 90 28 16
03-25 28° 43° 584 282 90 28 16
03-26 27° 43° 597 284 90 28 16
03-27 26° 56° 616 293 90 28 16
03-28 40° 64° 646 313 100 30 16
03-29 57° 67° 686 343 120 42 23
03-30 49° 66° 721 369 135 50 25
03-31 37° 58° 747 384 141 50 25
04-01 22° 42° 757 384 141 50 25
04-02 32° 47° 775 392 141 50 25
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 46° 65° 808 415 154 55 26
04-04 36° 51° 829 427 155 55 26
04-05 42° 50° 853 441 159 55 26
04-06 33° 46° 871 448 159 55 26
04-07 27° 45° 885 453 159 55 26
04-08 23° 37° 893 453 159 55 26
04-09 23° 46° 906 455 159 55 26
04-10 33° 37° 918 458 159 55 26
04-11 32° 51° 938 467 159 55 26
04-12 27° 56° 958 477 159 55 26
04-13 38° 57° 983 492 164 55 26
04-14 46° 72° 1020 519 181 64 30
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 41° 53° 1045 534 186 64 30
04-16 34° 53° 1067 546 188 64 30
04-17 28° 61° 1089 559 191 64 30
04-18 49° 81° 1132 592 214 79 40
04-19 50° 70° 1170 619 231 88 44
04-20 38° 55° 1195 634 236 88 44
04-21 47° 74° 1233 662 254 99 49
04-22 43° 65° 1265 684 266 102 49
04-23 47° 77° 1305 714 286 114 56
04-24 48° 83° 1348 747 309 130 67
04-25 51° 76° 1390 779 331 143 75
04-26 42° 60° 1419 798 340 144 75
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 37° 66° 1448 817 350 146 75
04-28 44° 73° 1485 844 366 154 79
04-29 52° 84° 1531 880 392 172 92
04-30 38° 61° 1558 897 399 172 92
05-01 46° 68° 1593 922 414 179 94
05-02 51° 69° 1631 950 432 189 99
05-03 44° 52° 1657 966 438 189 99
05-04 40° 52° 1682 981 443 189 99
05-05 48° 68° 1718 1007 459 197 102
05-06 53° 59° 1752 1031 473 204 103
05-07 49° 75° 1792 1061 493 216 110
05-08 41° 54° 1817 1077 499 216 110
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 34° 64° 1844 1094 506 216 110
05-10 45° 76° 1883 1122 524 226 116
05-11 44° 66° 1916 1145 538 231 116
05-12 45° 80° 1956 1176 558 244 123
05-13 63° 70° 2001 1210 582 260 134
05-14 60° 74° 2046 1245 607 277 147
05-15 58° 82° 2094 1283 635 297 162
05-16 60° 82° 2143 1323 665 318 178
05-17 56° 68° 2184 1353 685 331 185
05-18 53° 60° 2218 1377 699 337 187
05-19 44° 57° 2246 1396 708 338 187
05-20 38° 56° 2271 1410 713 338 187
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 48° 51° 2299 1428 720 338 187
05-22 48° 53° 2328 1447 729 338 187
05-23 40° 54° 2353 1462 734 338 187
05-24 42° 61° 2383 1482 744 340 187
05-25 41° 65° 2413 1503 755 343 187
05-26 43° 70° 2448 1527 769 349 188
05-27 50° 73° 2487 1556 788 360 194
05-28 52° 58° 2520 1579 801 365 194
05-29 54° 65° 2558 1607 819 375 199
05-30 52° 77° 2600 1639 841 389 208
05-31 49° 64° 2634 1664 856 396 210
06-01 41° 67° 2667 1686 868 400 210
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 44° 79° 2707 1716 888 412 216
06-03 55° 87° 2756 1755 917 433 232
06-04 62° 85° 2807 1797 949 456 251
06-05 55° 67° 2846 1825 968 467 257
06-06 56° 75° 2890 1859 991 483 268
06-07 53° 78° 2933 1892 1015 498 278
06-08 56° 76° 2977 1927 1039 515 289
06-09 59° 78° 3024 1963 1065 533 303
06-10 52° 72° 3064 1993 1085 545 310
06-11 53° 86° 3112 2031 1113 565 324
06-12 59° 74° 3156 2065 1137 581 336
06-13 56° 72° 3198 2097 1159 595 345
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 55° 77° 3242 2131 1183 611 356
06-15 55° 79° 3287 2166 1208 628 368
06-16 56° 83° 3334 2204 1236 647 382
06-17 63° 88° 3388 2247 1269 673 402
06-18 68° 79° 3439 2288 1300 696 421
06-19 62° 73° 3484 2323 1326 713 433
06-20 59° 77° 3530 2359 1351 731 446
06-21 65° 89° 3585 2405 1387 758 468
06-22 77° 95° 3649 2459 1431 794 499
06-23 74° 95° 3712 2511 1474 829 529
06-24 75° 93° 3774 2563 1516 863 558
06-25 70° 79° 3827 2606 1548 888 577
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 65° 86° 3880 2649 1581 913 598
06-27 71° 91° 3939 2698 1620 944 623
06-28 67° 79° 3990 2739 1651 967 642
06-29 61° 87° 4042 2781 1683 991 661
06-30 69° 84° 4096 2825 1718 1017 682
07-01 71° 84° 4152 2871 1753 1045 705
07-02 63° 86° 4204 2913 1786 1069 724
07-03 67° 85° 4258 2957 1820 1095 745
07-04 61° 87° 4310 3000 1852 1120 764
07-05 68° 93° 4369 3048 1890 1150 790
07-06 72° 93° 4430 3099 1931 1183 818
07-07 65° 76° 4478 3138 1960 1203 833
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 57° 84° 4527 3176 1988 1224 849
07-09 69° 80° 4579 3218 2020 1248 868
07-10 63° 87° 4632 3261 2053 1273 888
07-11 65° 84° 4684 3304 2086 1298 907
07-12 71° 87° 4742 3351 2123 1327 932
07-13 71° 87° 4799 3398 2160 1356 955
07-14 65° 85° 4852 3441 2193 1381 976
07-15 64° 89° 4907 3486 2228 1408 998
07-16 70° 84° 4962 3531 2263 1435 1020
07-17 65° 75° 5010 3569 2291 1455 1035
07-18 55° 76° 5053 3602 2315 1470 1045
07-19 58° 82° 5102 3641 2343 1491 1060
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 66° 79° 5152 3681 2373 1513 1078
07-21 58° 77° 5198 3717 2399 1531 1091
07-22 54° 80° 5243 3752 2424 1548 1102
07-23 58° 89° 5294 3793 2455 1571 1121
07-24 72° 97° 5356 3846 2498 1606 1150
07-25 73° 84° 5413 3892 2534 1634 1174
07-26 69° 81° 5466 3935 2567 1659 1194
07-27 73° 91° 5526 3986 2608 1691 1221
07-28 69° 89° 5584 4033 2645 1721 1246
07-29 69° 87° 5640 4079 2681 1749 1268
07-30 64° 85° 5692 4121 2713 1773 1288
07-31 60° 74° 5737 4156 2738 1790 1300
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 56° 76° 5781 4190 2763 1806 1311
08-02 54° 78° 5825 4224 2787 1822 1322
08-03 57° 80° 5872 4261 2813 1841 1336
08-04 58° 82° 5920 4299 2841 1861 1351
08-05 63° 83° 5971 4340 2872 1884 1369
08-06 65° 84° 6023 4383 2905 1908 1388
08-07 65° 85° 6076 4426 2938 1933 1408
08-08 65° 89° 6131 4470 2972 1960 1430
08-09 69° 89° 6188 4518 3010 1990 1454
08-10 69° 92° 6247 4566 3048 2020 1480
08-11 69° 92° 6306 4615 3087 2051 1505
08-12 69° 90° 6363 4662 3124 2080 1530
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 68° 83° 6417 4706 3158 2106 1550
08-14 63° 82° 6467 4746 3189 2128 1568
08-15 63° 85° 6520 4789 3221 2153 1587
08-16 66° 90° 6576 4835 3257 2181 1610
08-17 63° 81° 6626 4875 3287 2203 1627
08-18 56° 78° 6670 4909 3312 2219 1639
08-19 63° 76° 6718 4947 3339 2239 1654
08-20 65° 70° 6763 4982 3365 2256 1666
08-21 63° 75° 6810 5019 3391 2275 1680
08-22 57° 81° 6857 5056 3418 2294 1694
08-23 64° 78° 6906 5096 3448 2315 1710
08-24 56° 76° 6950 5130 3472 2331 1721
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 54° 68° 6989 5158 3490 2342 1727
08-26 50° 70° 7027 5186 3508 2352 1732
08-27 49° 75° 7067 5216 3528 2364 1739
08-28 52° 69° 7105 5245 3547 2375 1744
08-29 47° 66° 7140 5270 3562 2381 1746
08-30 45° 72° 7177 5296 3578 2390 1750
08-31 47° 76° 7216 5326 3598 2401 1756
09-01 49° 78° 7258 5357 3619 2415 1765
09-02 50° 79° 7300 5389 3641 2429 1774
09-03 53° 81° 7345 5424 3666 2446 1786
09-04 53° 66° 7383 5452 3684 2456 1790
09-05 46° 72° 7420 5479 3701 2465 1794
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 51° 64° 7455 5505 3717 2472 1797
09-07 43° 67° 7489 5528 3730 2478 1798
09-08 44° 69° 7523 5552 3744 2484 1799
09-09 45° 76° 7562 5581 3763 2495 1805
09-10 51° 78° 7604 5614 3786 2509 1814
09-11 51° 79° 7647 5646 3808 2524 1824
09-12 53° 80° 7691 5680 3833 2540 1835
09-13 55° 78° 7736 5715 3857 2557 1846
09-14 51° 82° 7780 5749 3881 2573 1858
09-15 57° 82° 7827 5786 3908 2592 1872
09-16 54° 83° 7873 5823 3935 2611 1885
09-17 53° 83° 7919 5859 3961 2628 1898
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 56° 87° 7969 5898 3990 2650 1915
09-19 61° 77° 8016 5935 4017 2669 1929
09-20 56° 77° 8060 5969 4041 2685 1940
09-21 57° 72° 8102 6002 4064 2700 1949
09-22 61° 75° 8149 6038 4090 2718 1963
09-23 60° 75° 8194 6073 4115 2735 1975
09-24 63° 73° 8240 6109 4142 2753 1988
09-25 62° 75° 8287 6146 4168 2772 2001
09-26 54° 81° 8332 6181 4194 2789 2014
09-27 54° 86° 8380 6219 4222 2809 2029
09-28 58° 80° 8427 6257 4249 2828 2043
09-29 49° 82° 8471 6290 4272 2844 2054
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 50° 81° 8514 6324 4296 2859 2064
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 26° 37° 10 0 0 0 0
02-16 24° 30° 15 0 0 0 0
02-17 19° 27° 16 0 0 0 0
02-18 19° 35° 21 0 0 0 0
02-19 20° 39° 29 0 0 0 0
02-20 24° 48° 43 4 0 0 0
02-21 30° 60° 66 17 3 0 0
02-22 36° 54° 88 30 6 0 0
02-23 22° 49° 102 34 6 0 0
02-24 20° 33° 106 34 6 0 0
02-25 25° 49° 122 39 6 0 0
02-26 33° 54° 143 51 7 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 41° 73° 178 76 22 7 2
02-28 23° 62° 199 86 23 7 2
02-29 20° 36° 205 86 23 7 2
03-01 27° 47° 220 91 23 7 2
03-02 37° 52° 242 104 26 7 2
03-03 34° 57° 266 117 29 7 2
03-04 40° 73° 300 142 43 13 3
03-05 41° 58° 328 159 51 13 3
03-06 38° 45° 348 169 51 13 3
03-07 38° 52° 371 182 55 13 3
03-08 40° 50° 394 196 58 13 3
03-09 35° 53° 417 208 60 13 3
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 37° 428 209 60 13 3
03-11 28° 55° 448 219 60 13 3
03-12 41° 69° 481 242 73 18 3
03-13 50° 69° 518 270 91 28 8
03-14 44° 53° 545 286 97 28 8
03-15 35° 46° 563 295 97 28 8
03-16 33° 58° 586 308 101 28 8
03-17 31° 41° 601 312 101 28 8
03-18 25° 33° 608 312 101 28 8
03-19 30° 45° 623 317 101 28 8
03-20 25° 37° 632 317 101 28 8
03-21 21° 35° 638 317 101 28 8
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 24° 29° 643 317 101 28 8
03-23 24° 34° 650 317 101 28 8
03-24 21° 38° 657 317 101 28 8
03-25 31° 61° 682 332 105 28 8
03-26 45° 55° 710 350 113 28 8
03-27 30° 44° 724 354 113 28 8
03-28 26° 48° 739 359 113 28 8
03-29 25° 51° 756 366 113 28 8
03-30 34° 41° 771 371 113 28 8
03-31 36° 44° 789 379 113 28 8
04-01 35° 53° 811 391 114 28 8
04-02 39° 47° 832 402 115 28 8
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 37° 49° 853 413 116 28 8
04-04 33° 48° 871 421 116 28 8
04-05 34° 46° 890 430 116 28 8
04-06 39° 56° 915 445 122 28 8
04-07 29° 57° 936 456 123 28 8
04-08 46° 71° 973 483 139 37 12
04-09 47° 75° 1012 512 158 48 18
04-10 43° 64° 1044 534 170 52 18
04-11 46° 56° 1073 553 179 53 18
04-12 45° 50° 1098 568 185 53 18
04-13 41° 62° 1128 588 194 54 18
04-14 48° 79° 1169 619 215 67 26
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 46° 64° 1202 642 228 72 26
04-16 44° 63° 1234 664 240 76 26
04-17 53° 65° 1270 690 257 85 30
04-18 51° 66° 1307 717 273 93 33
04-19 44° 59° 1336 736 283 95 33
04-20 38° 46° 1356 746 283 95 33
04-21 37° 45° 1375 755 283 95 33
04-22 33° 63° 1401 771 289 95 33
04-23 48° 58° 1432 792 300 98 33
04-24 32° 48° 1451 801 300 98 33
04-25 28° 53° 1469 809 300 98 33
04-26 33° 63° 1495 825 306 98 33
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 52° 80° 1539 859 330 114 45
04-28 56° 76° 1583 893 354 130 55
04-29 55° 80° 1629 929 379 147 68
04-30 55° 72° 1670 960 401 161 77
05-01 49° 81° 1713 993 424 176 87
05-02 48° 69° 1750 1020 440 184 90
05-03 57° 71° 1791 1051 462 198 99
05-04 55° 74° 1834 1084 484 213 108
05-05 54° 68° 1873 1113 504 224 115
05-06 46° 66° 1907 1137 518 230 116
05-07 43° 67° 1940 1160 531 235 116
05-08 52° 77° 1983 1193 554 250 126
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 48° 59° 2015 1215 565 253 126
05-10 44° 64° 2047 1237 577 257 126
05-11 49° 55° 2077 1257 587 260 126
05-12 42° 70° 2111 1281 602 266 127
05-13 56° 82° 2158 1318 629 285 141
05-14 55° 69° 2198 1348 648 297 148
05-15 51° 75° 2239 1379 670 310 156
05-16 50° 78° 2281 1411 691 324 165
05-17 60° 74° 2326 1446 716 341 177
05-18 60° 78° 2373 1483 744 360 191
05-19 55° 88° 2423 1523 774 382 208
05-20 58° 85° 2472 1562 803 403 224
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 64° 87° 2526 1606 837 429 245
05-22 69° 87° 2582 1652 873 457 268
05-23 58° 80° 2629 1689 899 475 282
05-24 53° 81° 2674 1724 924 493 294
05-25 63° 80° 2723 1763 954 514 310
05-26 54° 79° 2768 1798 978 531 322
05-27 59° 68° 2809 1829 1000 544 330
05-28 56° 71° 2851 1861 1021 558 339
05-29 50° 67° 2887 1887 1038 566 342
05-30 42° 70° 2921 1911 1052 572 343
05-31 45° 77° 2960 1940 1071 583 349
06-01 52° 77° 3003 1973 1094 598 359
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 62° 74° 3049 2009 1120 616 372
06-03 54° 78° 3093 2043 1144 632 383
06-04 60° 86° 3144 2084 1175 655 401
06-05 68° 83° 3198 2128 1208 680 421
06-06 60° 78° 3245 2165 1235 699 436
06-07 59° 68° 3286 2196 1257 713 444
06-08 52° 76° 3328 2228 1279 727 453
06-09 53° 73° 3369 2259 1300 740 461
06-10 51° 68° 3407 2287 1318 750 466
06-11 45° 73° 3444 2314 1335 759 470
06-12 58° 85° 3494 2354 1364 780 486
06-13 70° 90° 3552 2402 1403 811 512
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 62° 79° 3601 2441 1431 831 527
06-15 52° 77° 3643 2473 1454 846 537
06-16 56° 86° 3692 2512 1483 867 553
06-17 69° 91° 3750 2560 1521 897 578
06-18 75° 90° 3810 2610 1561 929 605
06-19 75° 92° 3871 2661 1602 962 633
06-20 71° 86° 3928 2708 1639 991 657
06-21 65° 88° 3982 2752 1673 1017 678
06-22 68° 90° 4039 2799 1710 1046 702
06-23 68° 80° 4091 2841 1742 1070 721
06-24 63° 81° 4141 2881 1772 1092 738
06-25 66° 83° 4194 2924 1804 1116 757
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 68° 79° 4245 2965 1836 1140 776
06-27 58° 71° 4288 2998 1859 1155 786
06-28 54° 74° 4330 3030 1881 1169 795
06-29 66° 87° 4385 3075 1915 1195 817
06-30 58° 80° 4430 3110 1940 1212 829
07-01 49° 74° 4469 3139 1960 1224 835
07-02 54° 80° 4514 3174 1985 1241 847
07-03 68° 86° 4569 3219 2020 1268 869
07-04 63° 84° 4621 3261 2051 1291 888
07-05 65° 80° 4671 3301 2082 1314 905
07-06 63° 80° 4721 3341 2112 1336 922
07-07 58° 84° 4770 3380 2141 1357 938
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 67° 89° 4826 3426 2176 1385 961
07-09 70° 83° 4880 3470 2211 1411 982
07-10 63° 73° 4927 3507 2237 1429 995
07-11 64° 81° 4977 3547 2267 1452 1013
07-12 64° 82° 5028 3588 2298 1474 1030
07-13 64° 88° 5082 3632 2332 1500 1051
07-14 71° 86° 5138 3678 2369 1529 1075
07-15 72° 85° 5194 3724 2405 1557 1098
07-16 70° 87° 5251 3771 2441 1585 1121
07-17 67° 83° 5304 3814 2474 1610 1141
07-18 58° 73° 5347 3847 2498 1626 1152
07-19 56° 80° 5393 3883 2524 1644 1165
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 59° 81° 5441 3921 2552 1664 1180
07-21 63° 84° 5493 3963 2583 1687 1198
07-22 64° 81° 5543 4003 2614 1710 1216
07-23 64° 84° 5595 4045 2645 1734 1235
07-24 66° 77° 5644 4084 2675 1755 1251
07-25 62° 78° 5692 4122 2703 1775 1266
07-26 58° 79° 5739 4159 2729 1793 1280
07-27 56° 82° 5786 4196 2757 1813 1294
07-28 60° 89° 5839 4239 2789 1837 1314
07-29 73° 83° 5894 4284 2825 1865 1336
07-30 70° 83° 5949 4329 2859 1891 1358
07-31 68° 91° 6006 4376 2897 1921 1382
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 69° 90° 6064 4424 2935 1951 1407
08-02 71° 79° 6117 4467 2968 1976 1427
08-03 70° 86° 6173 4513 3004 2004 1450
08-04 65° 88° 6228 4558 3039 2031 1472
08-05 70° 84° 6283 4603 3074 2058 1494
08-06 60° 71° 6327 4637 3098 2074 1505
08-07 59° 76° 6373 4673 3123 2091 1518
08-08 60° 80° 6421 4711 3151 2111 1532
08-09 64° 78° 6470 4750 3180 2132 1549
08-10 55° 73° 6512 4782 3203 2147 1558
08-11 58° 75° 6556 4816 3227 2163 1569
08-12 55° 79° 6601 4851 3252 2180 1581
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 57° 80° 6648 4888 3279 2199 1595
08-14 58° 82° 6696 4926 3307 2219 1610
08-15 58° 80° 6743 4963 3334 2238 1624
08-16 66° 78° 6793 5003 3364 2260 1641
08-17 67° 77° 6843 5043 3394 2282 1658
08-18 66° 76° 6893 5083 3423 2303 1675
08-19 58° 70° 6935 5115 3445 2317 1684
08-20 54° 70° 6975 5145 3466 2330 1691
08-21 50° 73° 7014 5174 3485 2341 1697
08-22 48° 78° 7055 5205 3506 2354 1705
08-23 53° 80° 7100 5240 3530 2371 1717
08-24 57° 85° 7149 5279 3560 2392 1733
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 65° 86° 7202 5322 3593 2417 1753
08-26 69° 93° 7261 5371 3632 2448 1779
08-27 71° 94° 7322 5422 3673 2481 1807
08-28 70° 80° 7375 5465 3706 2506 1827
08-29 65° 78° 7424 5504 3735 2527 1843
08-30 66° 90° 7480 5550 3771 2555 1866
08-31 67° 83° 7533 5593 3804 2580 1886
09-01 61° 76° 7580 5630 3831 2599 1900
09-02 50° 70° 7618 5658 3849 2609 1905
09-03 47° 73° 7656 5686 3867 2619 1910
09-04 50° 78° 7698 5718 3889 2633 1919
09-05 54° 84° 7745 5755 3916 2652 1933
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 57° 68° 7786 5786 3936 2664 1940
09-07 49° 60° 7818 5808 3949 2669 1940
09-08 42° 70° 7852 5832 3963 2675 1941
09-09 55° 79° 7897 5867 3988 2692 1953
09-10 52° 80° 7941 5901 4011 2707 1964
09-11 55° 85° 7989 5939 4039 2727 1979
09-12 55° 83° 8036 5976 4066 2746 1993
09-13 59° 81° 8084 6014 4094 2766 2008
09-14 59° 80° 8131 6051 4122 2786 2022
09-15 59° 83° 8180 6090 4151 2807 2039
09-16 56° 80° 8226 6126 4177 2825 2051
09-17 54° 78° 8270 6160 4201 2841 2062
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 59° 80° 8317 6197 4228 2860 2077
09-19 57° 81° 8364 6234 4255 2879 2091
09-20 56° 83° 8412 6272 4282 2899 2105
09-21 61° 86° 8463 6313 4314 2922 2124
09-22 58° 81° 8511 6351 4341 2941 2138
09-23 60° 67° 8552 6382 4363 2955 2147
09-24 58° 69° 8594 6414 4385 2969 2156
09-25 63° 74° 8640 6450 4411 2987 2169
09-26 57° 72° 8683 6483 4433 3002 2178
09-27 59° 74° 8727 6517 4458 3018 2190
09-28 64° 68° 8771 6551 4482 3034 2201
09-29 64° 71° 8817 6587 4507 3052 2213
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 61° 73° 8861 6621 4532 3068 2225

 

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 2004-2025, 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.