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MSU Poa Seedhead Flush (GDD 22)
through Mon, Dec. 8. 2025

 
  

Davison, 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 18° 29° 2 0 0 0 0
02-16 21° 27° 4 0 0 0 0
02-17 5° 19° 4 0 0 0 0
02-18 -1° 16° 4 0 0 0 0
02-19 7° 16° 4 0 0 0 0
02-20 14° 22° 4 0 0 0 0
02-21 20° 30° 7 0 0 0 0
02-22 17° 29° 8 0 0 0 0
02-23 23° 35° 16 0 0 0 0
02-24 29° 47° 32 6 0 0 0
02-25 33° 51° 52 16 0 0 0
02-26 26° 40° 63 18 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 39° 78 22 0 0 0
02-28 29° 51° 96 30 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 19° 34° 101 30 0 0 0
03-02 17° 27° 101 30 0 0 0
03-03 18° 38° 107 30 0 0 0
03-04 34° 47° 126 39 0 0 0
03-05 34° 55° 148 51 3 0 0
03-06 25° 33° 155 51 3 0 0
03-07 26° 38° 165 51 3 0 0
03-08 19° 36° 171 51 3 0 0
03-09 31° 55° 192 62 3 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 33° 64° 218 79 10 0 0
03-11 34° 53° 240 90 12 0 0
03-12 25° 48° 254 95 12 0 0
03-13 26° 58° 274 104 12 0 0
03-14 36° 71° 305 126 23 4 0
03-15 57° 73° 349 159 46 19 10
03-16 29° 57° 370 170 47 19 10
03-17 26° 46° 384 174 47 19 10
03-18 38° 65° 413 194 57 20 10
03-19 57° 71° 455 226 79 34 19
03-20 31° 58° 477 238 81 34 19
03-21 26° 53° 495 246 81 34 19
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 27° 48° 511 251 81 34 19
03-23 22° 42° 521 251 81 34 19
03-24 33° 40° 535 256 81 34 19
03-25 26° 40° 546 257 81 34 19
03-26 24° 42° 558 258 81 34 19
03-27 23° 55° 575 265 81 34 19
03-28 37° 63° 603 283 89 34 19
03-29 44° 65° 635 306 101 39 19
03-30 44° 67° 668 329 115 44 20
03-31 32° 56° 691 341 117 44 20
04-01 22° 42° 701 341 117 44 20
04-02 33° 50° 720 351 117 44 20
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 42° 62° 750 371 127 46 20
04-04 34° 51° 770 381 127 46 20
04-05 40° 51° 794 394 130 46 20
04-06 31° 44° 809 400 130 46 20
04-07 24° 41° 820 400 130 46 20
04-08 23° 36° 827 400 130 46 20
04-09 23° 45° 839 403 130 46 20
04-10 31° 38° 852 405 130 46 20
04-11 29° 51° 869 413 130 46 20
04-12 25° 55° 888 421 130 46 20
04-13 39° 57° 914 437 136 46 20
04-14 47° 71° 951 464 153 55 23
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 39° 50° 973 477 156 55 23
04-16 34° 52° 994 488 157 55 23
04-17 26° 63° 1016 500 159 55 23
04-18 53° 77° 1059 533 182 70 34
04-19 46° 67° 1094 558 197 76 35
04-20 34° 57° 1118 571 200 76 35
04-21 47° 67° 1153 597 216 84 38
04-22 41° 63° 1183 617 225 86 38
04-23 46° 69° 1219 642 241 94 41
04-24 48° 81° 1261 675 264 108 50
04-25 51° 76° 1302 706 285 121 58
04-26 42° 54° 1328 722 291 121 58
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 34° 66° 1356 740 299 121 58
04-28 46° 74° 1394 768 317 131 63
04-29 48° 82° 1437 801 340 146 73
04-30 34° 59° 1462 815 344 146 73
05-01 44° 69° 1496 840 359 153 75
05-02 52° 63° 1531 865 374 160 77
05-03 43° 53° 1557 881 380 160 77
05-04 38° 58° 1583 897 386 160 77
05-05 48° 63° 1617 920 399 166 78
05-06 51° 61° 1650 944 413 171 78
05-07 48° 74° 1689 973 432 182 84
05-08 39° 52° 1713 986 435 182 84
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 32° 63° 1738 1002 441 182 84
05-10 46° 75° 1777 1031 459 193 90
05-11 41° 69° 1810 1053 472 198 90
05-12 44° 80° 1850 1083 492 210 97
05-13 61° 71° 1894 1117 516 226 108
05-14 62° 75° 1940 1154 543 244 121
05-15 58° 81° 1988 1191 570 263 136
05-16 60° 82° 2037 1230 599 285 152
05-17 56° 71° 2078 1262 621 298 161
05-18 52° 58° 2112 1285 634 304 161
05-19 43° 56° 2139 1303 642 304 161
05-20 37° 56° 2163 1317 646 304 161
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 48° 51° 2191 1334 653 304 161
05-22 47° 52° 2218 1352 661 304 161
05-23 39° 53° 2243 1366 665 304 161
05-24 40° 60° 2271 1384 673 304 161
05-25 40° 64° 2301 1405 684 306 161
05-26 41° 70° 2335 1429 697 312 162
05-27 49° 72° 2373 1457 716 322 167
05-28 52° 61° 2408 1481 730 329 168
05-29 55° 65° 2446 1510 749 339 174
05-30 52° 74° 2487 1540 769 352 182
05-31 47° 64° 2521 1564 783 357 182
06-01 39° 67° 2552 1585 794 360 182
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 42° 78° 2590 1613 812 371 188
06-03 56° 85° 2639 1652 841 391 203
06-04 61° 80° 2687 1691 870 412 219
06-05 57° 72° 2729 1723 892 426 228
06-06 54° 75° 2772 1755 914 441 238
06-07 52° 77° 2814 1788 937 455 247
06-08 57° 76° 2859 1823 961 472 259
06-09 58° 76° 2904 1858 986 489 271
06-10 53° 70° 2943 1887 1006 500 277
06-11 51° 86° 2990 1923 1032 519 290
06-12 61° 74° 3035 1959 1057 536 303
06-13 55° 68° 3074 1988 1077 547 309
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 53° 77° 3118 2021 1100 563 319
06-15 55° 79° 3163 2056 1125 580 331
06-16 56° 83° 3210 2094 1153 599 346
06-17 63° 88° 3263 2137 1186 624 366
06-18 69° 75° 3313 2177 1216 646 383
06-19 59° 74° 3358 2212 1240 663 395
06-20 59° 76° 3403 2247 1266 680 407
06-21 66° 88° 3458 2292 1301 707 429
06-22 78° 91° 3521 2345 1343 742 459
06-23 76° 92° 3583 2397 1386 776 488
06-24 72° 90° 3642 2446 1425 807 514
06-25 68° 79° 3693 2487 1456 830 532
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 67° 84° 3747 2530 1489 856 552
06-27 72° 89° 3805 2579 1528 886 578
06-28 66° 75° 3854 2618 1556 907 594
06-29 60° 85° 3905 2658 1587 930 612
06-30 70° 81° 3958 2702 1621 955 632
07-01 69° 81° 4011 2745 1654 980 652
07-02 62° 85° 4063 2786 1685 1004 671
07-03 64° 82° 4114 2827 1716 1027 688
07-04 59° 86° 4165 2868 1747 1049 706
07-05 71° 90° 4223 2917 1785 1080 732
07-06 73° 90° 4283 2966 1825 1112 758
07-07 61° 74° 4328 3002 1850 1129 771
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 56° 82° 4375 3039 1878 1148 785
07-09 68° 80° 4427 3081 1910 1172 804
07-10 63° 82° 4478 3121 1940 1194 821
07-11 64° 81° 4528 3162 1971 1217 839
07-12 71° 85° 4585 3208 2007 1246 862
07-13 69° 85° 4639 3253 2042 1272 884
07-14 62° 83° 4690 3293 2072 1295 901
07-15 64° 86° 4743 3336 2105 1319 921
07-16 69° 84° 4797 3381 2140 1346 943
07-17 63° 76° 4844 3418 2167 1365 957
07-18 53° 76° 4887 3450 2189 1380 966
07-19 61° 79° 4935 3488 2217 1400 981
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 65° 77° 4984 3528 2247 1421 998
07-21 57° 76° 5029 3562 2271 1437 1009
07-22 52° 81° 5073 3596 2295 1454 1021
07-23 59° 88° 5124 3638 2327 1477 1039
07-24 73° 95° 5186 3690 2369 1511 1068
07-25 71° 82° 5241 3735 2404 1538 1090
07-26 69° 83° 5296 3779 2438 1564 1111
07-27 71° 90° 5354 3828 2477 1595 1137
07-28 69° 89° 5411 3875 2514 1624 1161
07-29 69° 88° 5468 3921 2550 1652 1184
07-30 63° 83° 5519 3962 2581 1676 1202
07-31 63° 76° 5566 4000 2609 1695 1217
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 54° 75° 5609 4032 2631 1710 1226
08-02 51° 78° 5651 4065 2654 1724 1236
08-03 56° 80° 5697 4101 2680 1742 1249
08-04 56° 81° 5744 4137 2706 1761 1262
08-05 59° 83° 5793 4177 2736 1782 1279
08-06 63° 84° 5845 4218 2767 1805 1297
08-07 63° 85° 5897 4260 2799 1830 1316
08-08 66° 88° 5952 4306 2834 1857 1339
08-09 72° 90° 6011 4355 2873 1888 1365
08-10 71° 91° 6070 4404 2913 1919 1391
08-11 72° 90° 6129 4453 2952 1950 1417
08-12 68° 87° 6185 4498 2987 1978 1440
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 67° 81° 6237 4541 3020 2002 1459
08-14 63° 81° 6287 4581 3050 2024 1476
08-15 64° 85° 6340 4623 3082 2049 1495
08-16 67° 88° 6396 4669 3118 2076 1518
08-17 61° 77° 6442 4706 3145 2095 1532
08-18 52° 80° 6487 4740 3169 2111 1543
08-19 64° 72° 6533 4776 3195 2130 1556
08-20 63° 70° 6577 4811 3220 2146 1568
08-21 62° 74° 6623 4847 3245 2164 1581
08-22 54° 79° 6668 4881 3270 2181 1592
08-23 64° 79° 6717 4921 3300 2202 1609
08-24 55° 73° 6759 4953 3321 2216 1618
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 52° 67° 6797 4980 3339 2226 1622
08-26 48° 68° 6833 5006 3355 2233 1625
08-27 45° 73° 6870 5034 3372 2243 1630
08-28 55° 67° 6909 5063 3392 2254 1636
08-29 49° 65° 6944 5087 3406 2261 1637
08-30 44° 71° 6979 5113 3422 2268 1640
08-31 47° 74° 7018 5141 3440 2279 1645
09-01 48° 77° 7058 5172 3461 2291 1653
09-02 49° 78° 7100 5203 3482 2305 1661
09-03 54° 78° 7144 5237 3506 2321 1672
09-04 50° 64° 7179 5262 3521 2328 1674
09-05 47° 69° 7215 5288 3537 2336 1677
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 48° 61° 7247 5311 3550 2340 1677
09-07 41° 66° 7279 5333 3561 2344 1677
09-08 40° 68° 7311 5354 3573 2348 1677
09-09 45° 75° 7349 5382 3591 2358 1682
09-10 51° 78° 7391 5414 3613 2372 1692
09-11 49° 77° 7432 5446 3635 2385 1700
09-12 50° 79° 7475 5479 3657 2400 1710
09-13 56° 78° 7520 5513 3682 2416 1721
09-14 51° 82° 7564 5548 3706 2433 1733
09-15 55° 82° 7610 5584 3733 2451 1746
09-16 51° 81° 7654 5618 3757 2467 1757
09-17 49° 81° 7697 5651 3780 2482 1767
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 55° 86° 7746 5689 3808 2503 1782
09-19 60° 75° 7791 5725 3833 2520 1795
09-20 54° 79° 7835 5759 3858 2536 1806
09-21 55° 71° 7876 5790 3879 2549 1814
09-22 62° 77° 7924 5827 3906 2569 1828
09-23 60° 75° 7969 5863 3932 2586 1841
09-24 62° 74° 8015 5899 3958 2604 1854
09-25 60° 74° 8060 5934 3983 2621 1866
09-26 52° 80° 8104 5968 4007 2637 1877
09-27 54° 85° 8152 6005 4034 2657 1892
09-28 57° 79° 8198 6042 4061 2675 1905
09-29 48° 82° 8241 6075 4084 2690 1915
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 48° 80° 8283 6107 4106 2704 1924
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 27° 35° 9 0 0 0 0
02-16 23° 30° 14 0 0 0 0
02-17 19° 25° 14 0 0 0 0
02-18 19° 34° 18 0 0 0 0
02-19 18° 38° 24 0 0 0 0
02-20 24° 48° 38 4 0 0 0
02-21 35° 58° 63 19 5 0 0
02-22 34° 52° 84 29 5 0 0
02-23 22° 45° 95 31 5 0 0
02-24 19° 31° 99 31 5 0 0
02-25 26° 51° 115 37 5 0 0
02-26 29° 54° 134 47 5 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 49° 72° 173 75 24 11 6
02-28 23° 60° 192 85 24 11 6
02-29 18° 33° 196 85 24 11 6
03-01 26° 49° 212 90 24 11 6
03-02 39° 54° 236 105 28 11 6
03-03 35° 59° 261 120 33 11 6
03-04 46° 70° 297 146 49 18 8
03-05 40° 62° 326 165 58 19 8
03-06 35° 43° 343 171 58 19 8
03-07 33° 54° 364 183 59 19 8
03-08 38° 51° 387 195 62 19 8
03-09 33° 53° 408 206 63 19 8
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 28° 36° 418 206 63 19 8
03-11 30° 56° 438 217 64 19 8
03-12 41° 69° 471 240 77 24 8
03-13 46° 67° 506 265 91 31 10
03-14 44° 53° 532 281 98 31 10
03-15 35° 46° 551 290 98 31 10
03-16 32° 56° 573 302 99 31 10
03-17 30° 42° 587 306 99 31 10
03-18 26° 32° 594 306 99 31 10
03-19 30° 42° 608 309 99 31 10
03-20 23° 36° 615 309 99 31 10
03-21 18° 35° 620 309 99 31 10
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 24° 29° 625 309 99 31 10
03-23 26° 32° 632 309 99 31 10
03-24 18° 38° 638 309 99 31 10
03-25 31° 61° 662 323 104 31 10
03-26 46° 59° 692 344 114 33 10
03-27 30° 44° 707 348 114 33 10
03-28 29° 47° 723 354 114 33 10
03-29 25° 49° 738 359 114 33 10
03-30 34° 43° 754 366 114 33 10
03-31 35° 44° 772 373 114 33 10
04-01 36° 52° 794 385 116 33 10
04-02 38° 49° 815 397 117 33 10
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 35° 49° 835 406 117 33 10
04-04 33° 45° 852 413 117 33 10
04-05 33° 47° 870 421 117 33 10
04-06 37° 55° 894 435 121 33 10
04-07 28° 58° 915 446 122 33 10
04-08 47° 73° 953 475 140 43 15
04-09 48° 74° 992 503 159 54 21
04-10 38° 66° 1022 523 169 56 21
04-11 45° 55° 1050 541 177 56 21
04-12 44° 49° 1075 556 182 56 21
04-13 40° 60° 1102 574 190 56 21
04-14 47° 76° 1142 603 209 67 27
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 43° 63° 1173 624 220 71 27
04-16 43° 64° 1204 646 232 74 27
04-17 52° 67° 1241 673 249 83 31
04-18 49° 61° 1274 696 262 88 31
04-19 42° 54° 1300 712 268 88 31
04-20 37° 45° 1319 721 268 88 31
04-21 36° 46° 1339 730 268 88 31
04-22 32° 63° 1364 746 274 88 31
04-23 49° 59° 1397 768 286 92 31
04-24 32° 48° 1415 776 286 92 31
04-25 24° 54° 1432 783 286 92 31
04-26 33° 63° 1458 800 292 92 31
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 54° 80° 1503 835 317 109 43
04-28 57° 70° 1545 866 338 123 52
04-29 55° 77° 1588 900 362 138 63
04-30 51° 68° 1626 928 380 148 68
05-01 46° 79° 1667 958 400 161 75
05-02 45° 74° 1704 986 418 170 79
05-03 56° 70° 1745 1017 439 183 88
05-04 58° 74° 1790 1051 463 200 99
05-05 55° 66° 1828 1080 482 210 104
05-06 48° 66° 1864 1105 497 218 107
05-07 41° 68° 1896 1128 510 222 107
05-08 53° 73° 1937 1159 531 235 115
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 47° 60° 1969 1180 543 239 115
05-10 42° 63° 1999 1201 553 241 115
05-11 49° 55° 2030 1221 563 244 115
05-12 40° 71° 2063 1245 577 249 115
05-13 59° 82° 2111 1283 605 269 131
05-14 52° 64° 2147 1309 621 277 134
05-15 49° 71° 2185 1337 639 287 138
05-16 44° 77° 2224 1365 657 298 144
05-17 60° 76° 2270 1401 683 316 157
05-18 59° 80° 2317 1439 711 335 171
05-19 61° 87° 2369 1480 743 359 190
05-20 61° 84° 2419 1520 773 381 207
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 63° 84° 2470 1561 804 404 225
05-22 64° 84° 2522 1604 836 428 244
05-23 55° 77° 2566 1638 860 444 255
05-24 51° 80° 2609 1671 883 459 266
05-25 60° 76° 2655 1707 909 477 278
05-26 53° 76° 2697 1739 931 491 288
05-27 56° 63° 2735 1767 949 501 293
05-28 55° 70° 2776 1798 970 514 300
05-29 51° 65° 2812 1824 986 522 303
05-30 43° 68° 2845 1847 999 527 304
05-31 45° 75° 2883 1875 1017 537 308
06-01 53° 75° 2925 1906 1039 551 317
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 60° 70° 2968 1939 1062 566 327
06-03 52° 77° 3010 1972 1084 580 337
06-04 61° 84° 3061 2012 1115 603 354
06-05 66° 80° 3112 2053 1145 626 372
06-06 60° 74° 3157 2088 1171 643 384
06-07 57° 67° 3197 2118 1191 655 391
06-08 51° 72° 3236 2148 1210 666 398
06-09 54° 71° 3277 2178 1230 679 405
06-10 51° 68° 3314 2206 1248 688 409
06-11 44° 71° 3350 2231 1263 696 412
06-12 60° 83° 3399 2270 1293 717 428
06-13 67° 86° 3454 2315 1328 744 450
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 60° 76° 3500 2352 1354 762 463
06-15 52° 75° 3542 2383 1375 776 472
06-16 57° 85° 3590 2422 1404 796 488
06-17 66° 89° 3646 2468 1440 824 511
06-18 75° 87° 3705 2517 1479 855 536
06-19 76° 89° 3766 2567 1519 888 564
06-20 72° 86° 3823 2614 1556 917 588
06-21 66° 86° 3877 2658 1590 943 609
06-22 69° 87° 3933 2704 1627 971 632
06-23 67° 79° 3984 2745 1658 994 650
06-24 61° 79° 4032 2783 1686 1014 665
06-25 66° 79° 4083 2824 1716 1037 683
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 80° 4134 2866 1748 1060 701
06-27 58° 70° 4176 2898 1770 1074 711
06-28 54° 70° 4216 2928 1790 1086 717
06-29 66° 85° 4269 2971 1823 1111 737
06-30 56° 77° 4311 3003 1845 1125 747
07-01 47° 75° 4350 3032 1864 1136 753
07-02 53° 76° 4393 3064 1887 1151 762
07-03 71° 83° 4447 3109 1921 1177 784
07-04 63° 82° 4498 3149 1951 1200 801
07-05 65° 79° 4548 3189 1982 1222 818
07-06 64° 76° 4596 3227 2010 1242 833
07-07 59° 82° 4644 3266 2038 1262 848
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 68° 86° 4699 3311 2073 1289 871
07-09 68° 84° 4753 3355 2107 1315 892
07-10 63° 72° 4799 3391 2133 1333 905
07-11 63° 79° 4848 3430 2162 1354 921
07-12 64° 81° 4899 3471 2193 1377 938
07-13 65° 84° 4952 3513 2226 1402 958
07-14 71° 84° 5007 3559 2261 1429 981
07-15 70° 84° 5062 3604 2296 1456 1003
07-16 69° 83° 5116 3648 2330 1482 1024
07-17 65° 79° 5166 3688 2360 1504 1041
07-18 57° 72° 5209 3720 2383 1519 1050
07-19 55° 77° 5253 3754 2407 1535 1061
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 57° 80° 5300 3791 2433 1554 1075
07-21 63° 82° 5350 3831 2464 1576 1092
07-22 64° 81° 5400 3872 2494 1598 1110
07-23 66° 82° 5452 3914 2526 1622 1128
07-24 67° 75° 5501 3953 2555 1643 1144
07-25 60° 76° 5547 3989 2581 1661 1158
07-26 57° 79° 5593 4025 2607 1679 1170
07-27 56° 82° 5640 4061 2634 1698 1184
07-28 60° 85° 5690 4102 2664 1720 1202
07-29 72° 83° 5746 4148 2700 1748 1224
07-30 70° 84° 5801 4193 2735 1775 1247
07-31 68° 87° 5857 4238 2771 1803 1269
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 69° 87° 5913 4285 2807 1831 1292
08-02 70° 80° 5966 4328 2840 1856 1313
08-03 65° 87° 6020 4372 2874 1882 1334
08-04 64° 86° 6074 4415 2908 1908 1354
08-05 69° 79° 6126 4457 2940 1932 1373
08-06 61° 71° 6170 4491 2964 1948 1384
08-07 56° 75° 6214 4525 2987 1964 1395
08-08 56° 79° 6259 4560 3013 1981 1407
08-09 62° 76° 6306 4597 3040 2000 1421
08-10 55° 71° 6347 4629 3061 2013 1430
08-11 60° 74° 6392 4664 3086 2030 1441
08-12 52° 77° 6435 4697 3109 2045 1451
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 57° 81° 6482 4733 3136 2064 1465
08-14 57° 81° 6529 4771 3163 2083 1479
08-15 59° 79° 6576 4808 3190 2102 1493
08-16 64° 78° 6625 4847 3219 2123 1509
08-17 67° 76° 6675 4886 3248 2145 1526
08-18 65° 75° 6723 4924 3276 2165 1541
08-19 56° 67° 6762 4954 3296 2176 1548
08-20 51° 67° 6799 4981 3313 2185 1552
08-21 48° 71° 6837 5009 3331 2195 1556
08-22 48° 75° 6877 5038 3351 2207 1563
08-23 53° 77° 6920 5071 3374 2222 1573
08-24 57° 82° 6967 5109 3401 2241 1588
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 64° 87° 7021 5153 3435 2267 1608
08-26 69° 89° 7078 5200 3472 2296 1632
08-27 70° 92° 7137 5249 3511 2327 1658
08-28 69° 79° 7189 5290 3543 2351 1677
08-29 64° 79° 7238 5330 3572 2372 1694
08-30 68° 83° 7292 5374 3606 2398 1715
08-31 66° 80° 7344 5415 3637 2422 1733
09-01 59° 75° 7388 5450 3662 2438 1745
09-02 49° 68° 7425 5476 3679 2447 1748
09-03 46° 74° 7463 5505 3697 2457 1753
09-04 49° 78° 7505 5536 3719 2471 1762
09-05 55° 82° 7552 5573 3745 2490 1776
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 54° 70° 7592 5603 3765 2502 1783
09-07 48° 60° 7623 5625 3777 2505 1783
09-08 43° 69° 7657 5649 3791 2511 1784
09-09 57° 78° 7703 5684 3817 2529 1796
09-10 50° 78° 7745 5716 3839 2543 1805
09-11 56° 83° 7792 5754 3866 2562 1820
09-12 55° 84° 7840 5792 3894 2582 1835
09-13 58° 82° 7888 5830 3922 2602 1850
09-14 57° 82° 7935 5867 3949 2621 1864
09-15 59° 85° 7985 5907 3979 2643 1881
09-16 56° 83° 8033 5944 4006 2663 1895
09-17 52° 80° 8077 5978 4031 2679 1906
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 55° 82° 8123 6015 4057 2697 1920
09-19 56° 82° 8170 6052 4084 2716 1934
09-20 60° 82° 8219 6090 4113 2737 1950
09-21 60° 84° 8269 6130 4143 2759 1967
09-22 58° 78° 8315 6167 4169 2777 1980
09-23 57° 65° 8354 6196 4188 2788 1986
09-24 57° 71° 8396 6228 4210 2802 1995
09-25 61° 73° 8441 6263 4235 2819 2007
09-26 51° 71° 8480 6292 4254 2830 2013
09-27 54° 74° 8522 6324 4276 2844 2022
09-28 64° 72° 8568 6360 4302 2862 2035
09-29 64° 74° 8616 6397 4329 2882 2049
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 56° 73° 8658 6430 4352 2896 2059

 

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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