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MSU Annual Bluegrass Seedhead Embark Timer (GDD 22)
through Tue, Dec. 9. 2025

 
  

Fort Wayne, IN

        

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 24° 37° 9 0 0 0 0
02-16 21° 33° 13 0 0 0 0
02-17 4° 19° 13 0 0 0 0
02-18 2° 16° 13 0 0 0 0
02-19 11° 19° 13 0 0 0 0
02-20 9° 22° 13 0 0 0 0
02-21 19° 30° 16 0 0 0 0
02-22 15° 31° 17 0 0 0 0
02-23 23° 40° 27 0 0 0 0
02-24 33° 51° 47 10 0 0 0
02-25 33° 55° 69 22 2 0 0
02-26 28° 40° 81 24 2 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 50° 100 33 2 0 0
02-28 29° 57° 122 45 4 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 19° 38° 128 45 4 0 0
03-02 16° 32° 130 45 4 0 0
03-03 23° 38° 138 45 4 0 0
03-04 35° 53° 160 57 6 0 0
03-05 32° 52° 181 67 6 0 0
03-06 26° 36° 190 67 6 0 0
03-07 28° 38° 201 68 6 0 0
03-08 28° 41° 214 71 6 0 0
03-09 32° 55° 235 82 7 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 34° 65° 263 100 15 0 0
03-11 43° 65° 295 122 27 4 0
03-12 31° 56° 317 134 29 4 0
03-13 29° 64° 341 148 34 4 0
03-14 37° 76° 376 173 48 11 2
03-15 56° 70° 417 204 69 24 9
03-16 33° 57° 440 217 72 24 9
03-17 28° 47° 455 222 72 24 9
03-18 39° 69° 487 244 84 28 9
03-19 52° 68° 525 272 102 38 14
03-20 29° 51° 543 280 102 38 14
03-21 26° 54° 561 288 102 38 14
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 31° 45° 577 294 102 38 14
03-23 29° 45° 592 299 102 38 14
03-24 35° 47° 611 308 102 38 14
03-25 25° 49° 626 313 102 38 14
03-26 26° 49° 641 318 102 38 14
03-27 33° 58° 665 332 106 38 14
03-28 45° 77° 704 361 125 49 21
03-29 57° 70° 746 393 147 63 29
03-30 57° 70° 787 424 168 76 37
03-31 32° 57° 809 437 170 76 37
04-01 29° 47° 825 442 170 76 37
04-02 36° 68° 856 463 181 78 37
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 46° 64° 889 486 194 83 37
04-04 41° 52° 913 500 198 83 37
04-05 41° 53° 938 515 203 83 37
04-06 39° 44° 957 525 203 83 37
04-07 30° 48° 974 532 203 83 37
04-08 24° 39° 984 532 203 83 37
04-09 25° 44° 997 534 203 83 37
04-10 36° 44° 1015 542 203 83 37
04-11 32° 50° 1034 551 203 83 37
04-12 30° 56° 1055 563 204 83 37
04-13 42° 61° 1085 582 214 85 37
04-14 48° 69° 1121 609 230 93 41
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 40° 51° 1145 622 234 93 41
04-16 32° 53° 1165 632 234 93 41
04-17 34° 64° 1192 649 241 93 41
04-18 54° 81° 1238 685 267 111 53
04-19 49° 69° 1274 712 283 120 57
04-20 45° 62° 1306 734 295 123 57
04-21 50° 63° 1341 758 309 130 58
04-22 41° 68° 1373 781 322 135 58
04-23 50° 77° 1415 812 344 148 67
04-24 49° 82° 1459 846 367 164 77
04-25 54° 73° 1500 877 389 177 86
04-26 45° 60° 1531 898 400 180 86
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 39° 65° 1561 918 410 182 86
04-28 44° 79° 1600 947 429 193 93
04-29 55° 84° 1648 985 456 213 107
04-30 44° 64° 1679 1007 468 217 107
05-01 48° 74° 1718 1035 487 227 113
05-02 57° 73° 1761 1069 510 243 123
05-03 51° 58° 1794 1091 522 247 123
05-04 43° 52° 1819 1106 528 247 123
05-05 49° 63° 1853 1130 542 253 124
05-06 51° 67° 1890 1157 559 262 128
05-07 48° 73° 1929 1186 578 273 134
05-08 48° 60° 1961 1208 590 277 134
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 37° 66° 1990 1227 599 278 134
05-10 41° 79° 2028 1256 617 288 139
05-11 49° 73° 2067 1284 636 299 145
05-12 47° 76° 2107 1314 655 310 151
05-13 62° 67° 2149 1347 678 325 161
05-14 61° 73° 2194 1382 703 342 173
05-15 62° 83° 2245 1422 734 365 191
05-16 63° 84° 2297 1464 766 388 209
05-17 58° 65° 2336 1494 785 400 216
05-18 52° 65° 2373 1520 802 409 220
05-19 45° 68° 2408 1545 817 415 221
05-20 46° 54° 2436 1563 825 415 221
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 49° 60° 2469 1586 837 420 221
05-22 46° 57° 2498 1605 847 422 221
05-23 41° 61° 2527 1624 856 423 221
05-24 39° 65° 2557 1645 866 425 221
05-25 50° 65° 2593 1670 881 432 224
05-26 43° 70° 2627 1694 896 439 225
05-27 54° 69° 2667 1724 916 451 232
05-28 55° 60° 2703 1750 931 458 235
05-29 50° 66° 2739 1776 948 467 238
05-30 52° 73° 2780 1807 968 479 246
05-31 49° 67° 2816 1833 985 487 249
06-01 41° 70° 2849 1856 998 493 249
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 40° 80° 2887 1884 1016 503 254
06-03 59° 86° 2938 1925 1047 525 272
06-04 69° 80° 2991 1968 1079 550 292
06-05 63° 71° 3036 2003 1104 567 304
06-06 62° 71° 3080 2037 1129 584 315
06-07 60° 76° 3126 2073 1155 602 328
06-08 59° 76° 3171 2108 1180 619 340
06-09 60° 75° 3217 2144 1205 636 353
06-10 53° 74° 3258 2176 1227 650 361
06-11 59° 83° 3307 2215 1256 671 377
06-12 64° 84° 3360 2257 1288 695 397
06-13 61° 70° 3403 2290 1312 711 407
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 59° 66° 3444 2321 1333 724 415
06-15 60° 78° 3491 2358 1360 743 429
06-16 61° 80° 3540 2397 1389 763 445
06-17 67° 85° 3594 2441 1422 789 466
06-18 66° 85° 3647 2484 1456 815 486
06-19 66° 77° 3697 2524 1485 836 503
06-20 63° 82° 3747 2564 1516 859 520
06-21 68° 91° 3805 2612 1553 888 545
06-22 76° 92° 3866 2663 1595 922 573
06-23 75° 93° 3928 2715 1637 956 602
06-24 75° 92° 3989 2767 1678 989 630
06-25 72° 92° 4049 2816 1718 1021 657
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 72° 90° 4108 2865 1757 1052 683
06-27 72° 90° 4167 2914 1796 1083 709
06-28 72° 87° 4224 2961 1833 1112 733
06-29 64° 90° 4279 3007 1868 1139 755
06-30 74° 85° 4337 3054 1906 1169 780
07-01 70° 84° 4392 3099 1940 1195 802
07-02 61° 85° 4443 3140 1971 1218 820
07-03 66° 89° 4498 3186 2007 1246 842
07-04 66° 89° 4554 3231 2043 1274 865
07-05 69° 91° 4612 3279 2081 1304 890
07-06 72° 89° 4671 3328 2119 1334 916
07-07 70° 78° 4722 3370 2151 1358 934
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 61° 86° 4774 3411 2182 1381 953
07-09 70° 83° 4828 3455 2217 1408 974
07-10 66° 86° 4882 3499 2251 1434 995
07-11 69° 89° 4939 3547 2288 1463 1019
07-12 73° 88° 4998 3595 2327 1494 1045
07-13 70° 86° 5054 3641 2363 1522 1068
07-14 66° 86° 5108 3685 2397 1548 1089
07-15 62° 90° 5162 3729 2431 1573 1110
07-16 73° 84° 5219 3776 2467 1602 1134
07-17 69° 82° 5272 3819 2501 1628 1154
07-18 65° 76° 5321 3858 2529 1648 1170
07-19 63° 83° 5371 3898 2560 1671 1187
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 69° 77° 5423 3940 2591 1694 1206
07-21 63° 81° 5472 3980 2621 1716 1222
07-22 60° 82° 5521 4019 2650 1737 1238
07-23 61° 88° 5574 4061 2683 1762 1258
07-24 73° 94° 5636 4113 2724 1795 1287
07-25 73° 84° 5692 4159 2761 1824 1310
07-26 70° 85° 5748 4205 2797 1852 1333
07-27 73° 86° 5805 4253 2834 1881 1357
07-28 73° 87° 5864 4301 2872 1911 1383
07-29 71° 90° 5922 4349 2911 1942 1408
07-30 71° 88° 5979 4397 2948 1971 1432
07-31 60° 72° 6024 4431 2972 1987 1444
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 57° 75° 6068 4465 2997 2003 1455
08-02 55° 76° 6111 4499 3020 2019 1465
08-03 53° 78° 6155 4533 3044 2035 1476
08-04 58° 79° 6202 4569 3071 2054 1490
08-05 61° 83° 6252 4609 3101 2076 1507
08-06 66° 83° 6305 4652 3133 2100 1527
08-07 65° 86° 6358 4695 3167 2126 1547
08-08 66° 88° 6413 4740 3201 2152 1569
08-09 68° 90° 6470 4787 3238 2181 1593
08-10 69° 90° 6527 4834 3276 2210 1617
08-11 70° 88° 6584 4881 3313 2240 1641
08-12 71° 90° 6642 4929 3351 2270 1666
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 69° 86° 6697 4974 3386 2297 1688
08-14 62° 85° 6749 5016 3418 2321 1707
08-15 63° 88° 6802 5060 3451 2346 1727
08-16 69° 89° 6860 5107 3488 2375 1752
08-17 71° 86° 6916 5153 3525 2404 1775
08-18 64° 85° 6969 5196 3557 2428 1795
08-19 68° 84° 7023 5240 3592 2455 1816
08-20 68° 73° 7072 5279 3620 2475 1832
08-21 63° 72° 7117 5315 3646 2493 1844
08-22 59° 80° 7164 5352 3673 2512 1858
08-23 61° 78° 7212 5389 3701 2531 1873
08-24 56° 74° 7255 5422 3723 2546 1883
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 54° 71° 7295 5453 3744 2559 1890
08-26 50° 69° 7333 5480 3762 2569 1895
08-27 45° 74° 7370 5507 3779 2578 1899
08-28 55° 74° 7413 5540 3801 2592 1909
08-29 50° 70° 7451 5568 3820 2603 1914
08-30 48° 73° 7490 5597 3838 2613 1920
08-31 47° 76° 7529 5626 3858 2625 1926
09-01 48° 79° 7571 5658 3880 2638 1935
09-02 53° 80° 7615 5692 3904 2655 1946
09-03 52° 80° 7659 5727 3928 2671 1957
09-04 50° 67° 7696 5754 3945 2680 1961
09-05 49° 71° 7735 5782 3963 2690 1967
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 49° 66° 7770 5808 3979 2698 1969
09-07 44° 68° 7805 5832 3993 2704 1971
09-08 40° 70° 7838 5855 4006 2709 1971
09-09 43° 75° 7875 5882 4024 2718 1975
09-10 51° 80° 7918 5916 4047 2734 1985
09-11 51° 81° 7963 5950 4071 2750 1997
09-12 51° 82° 8007 5984 4096 2767 2008
09-13 54° 72° 8048 6015 4117 2780 2016
09-14 61° 84° 8099 6056 4148 2802 2034
09-15 57° 86° 8148 6095 4177 2824 2050
09-16 55° 84° 8196 6133 4204 2843 2065
09-17 57° 85° 8244 6172 4233 2864 2080
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 55° 87° 8294 6211 4262 2885 2097
09-19 57° 88° 8344 6251 4293 2908 2114
09-20 62° 87° 8396 6293 4325 2932 2133
09-21 65° 81° 8447 6334 4356 2955 2151
09-22 61° 72° 8491 6369 4380 2971 2162
09-23 61° 77° 8539 6406 4407 2990 2177
09-24 63° 77° 8587 6444 4435 3010 2192
09-25 61° 74° 8632 6479 4461 3028 2204
09-26 52° 79° 8675 6513 4484 3043 2214
09-27 53° 85° 8722 6550 4511 3062 2228
09-28 57° 87° 8772 6590 4541 3084 2245
09-29 57° 85° 8821 6628 4570 3105 2261
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 52° 83° 8867 6664 4596 3122 2274
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 31° 43° 15 5 0 0 0
02-16 24° 31° 20 5 0 0 0
02-17 11° 24° 20 5 0 0 0
02-18 15° 34° 23 5 0 0 0
02-19 16° 43° 30 5 0 0 0
02-20 22° 53° 45 10 0 0 0
02-21 35° 62° 72 27 6 0 0
02-22 40° 51° 95 40 10 0 0
02-23 32° 51° 114 49 10 0 0
02-24 20° 34° 120 49 10 0 0
02-25 23° 52° 135 55 10 0 0
02-26 33° 65° 162 72 16 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 53° 67° 200 100 34 10 5
02-28 25° 62° 222 111 36 10 5
02-29 21° 37° 229 111 36 10 5
03-01 27° 43° 242 115 36 10 5
03-02 38° 53° 266 128 40 10 5
03-03 37° 65° 295 148 49 11 5
03-04 50° 71° 334 176 67 22 11
03-05 53° 63° 370 202 83 30 14
03-06 43° 50° 394 216 88 30 14
03-07 38° 45° 414 226 88 30 14
03-08 41° 54° 439 241 93 30 14
03-09 34° 54° 461 253 95 30 14
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 31° 38° 473 255 95 30 14
03-11 27° 58° 493 266 95 30 14
03-12 42° 67° 526 288 108 34 14
03-13 44° 71° 562 314 124 42 17
03-14 53° 67° 600 342 142 52 22
03-15 40° 57° 626 358 148 52 22
03-16 34° 60° 651 373 153 52 22
03-17 31° 41° 665 377 153 52 22
03-18 28° 34° 674 377 153 52 22
03-19 29° 53° 693 386 153 52 22
03-20 26° 40° 704 387 153 52 22
03-21 23° 38° 712 387 153 52 22
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 30° 48° 729 394 153 52 22
03-23 27° 39° 740 396 153 52 22
03-24 26° 45° 754 399 153 52 22
03-25 34° 67° 782 417 161 53 22
03-26 41° 61° 811 437 170 54 22
03-27 32° 41° 826 441 170 54 22
03-28 26° 50° 842 447 170 54 22
03-29 32° 58° 864 460 173 54 22
03-30 45° 65° 897 482 186 59 22
03-31 41° 55° 923 498 192 59 22
04-01 41° 47° 945 510 194 59 22
04-02 41° 53° 970 525 199 59 22
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 35° 41° 986 531 199 59 22
04-04 35° 43° 1003 538 199 59 22
04-05 37° 47° 1023 548 199 59 22
04-06 31° 55° 1044 559 200 59 22
04-07 35° 58° 1068 573 204 59 22
04-08 43° 73° 1104 599 220 66 24
04-09 49° 72° 1142 627 238 77 30
04-10 46° 66° 1176 651 252 83 30
04-11 47° 55° 1205 670 261 84 30
04-12 44° 56° 1233 689 269 84 30
04-13 39° 65° 1263 709 279 86 30
04-14 52° 78° 1306 742 302 101 40
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 50° 67° 1343 768 319 109 44
04-16 49° 74° 1382 797 338 121 50
04-17 58° 69° 1424 829 360 134 59
04-18 50° 65° 1459 854 375 142 61
04-19 47° 60° 1491 876 387 145 61
04-20 38° 48° 1512 887 387 145 61
04-21 37° 44° 1530 895 387 145 61
04-22 34° 62° 1557 912 394 145 61
04-23 48° 54° 1585 931 403 146 61
04-24 39° 51° 1608 944 406 146 61
04-25 31° 53° 1629 954 406 146 61
04-26 35° 65° 1657 972 414 146 61
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 55° 77° 1701 1006 438 162 72
04-28 62° 77° 1748 1043 465 182 86
04-29 62° 72° 1793 1078 490 199 99
04-30 53° 70° 1833 1108 510 210 105
05-01 56° 79° 1878 1144 535 228 118
05-02 50° 82° 1922 1177 559 244 129
05-03 58° 74° 1966 1211 583 260 140
05-04 56° 74° 2009 1245 606 275 150
05-05 56° 65° 2048 1273 625 285 155
05-06 52° 67° 2085 1300 642 295 160
05-07 51° 79° 2128 1333 665 310 170
05-08 56° 78° 2173 1368 690 327 182
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 51° 65° 2209 1395 707 335 185
05-10 49° 64° 2244 1419 721 342 187
05-11 50° 62° 2278 1443 735 348 188
05-12 43° 75° 2315 1470 752 357 191
05-13 59° 79° 2362 1507 779 376 205
05-14 58° 69° 2403 1539 800 389 214
05-15 54° 69° 2443 1568 820 401 220
05-16 52° 75° 2485 1600 842 415 229
05-17 62° 75° 2532 1637 869 433 243
05-18 58° 82° 2580 1675 897 453 258
05-19 62° 86° 2632 1717 929 477 277
05-20 63° 86° 2684 1759 961 502 297
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 64° 87° 2737 1803 994 527 317
05-22 67° 82° 2790 1845 1027 551 336
05-23 54° 79° 2835 1880 1052 568 348
05-24 57° 83° 2882 1918 1079 588 363
05-25 60° 78° 2930 1955 1107 607 377
05-26 53° 77° 2973 1988 1130 622 387
05-27 59° 68° 3014 2019 1151 636 396
05-28 53° 71° 3054 2049 1171 648 403
05-29 52° 70° 3093 2078 1190 659 409
05-30 51° 70° 3132 2107 1209 670 415
05-31 50° 76° 3173 2138 1230 683 423
06-01 54° 77° 3216 2172 1254 698 433
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 61° 72° 3261 2206 1278 715 445
06-03 54° 82° 3307 2242 1304 733 457
06-04 63° 85° 3359 2284 1336 757 476
06-05 67° 79° 3410 2325 1367 780 494
06-06 62° 79° 3458 2363 1395 800 510
06-07 57° 77° 3503 2398 1420 817 522
06-08 52° 80° 3547 2432 1444 832 532
06-09 55° 77° 3591 2466 1468 848 543
06-10 54° 69° 3630 2496 1488 860 550
06-11 46° 75° 3669 2524 1506 871 556
06-12 59° 85° 3719 2564 1536 893 573
06-13 69° 90° 3776 2612 1574 922 597
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 65° 84° 3829 2654 1606 947 616
06-15 60° 81° 3877 2693 1635 967 632
06-16 58° 90° 3930 2735 1667 991 651
06-17 74° 94° 3992 2787 1709 1026 680
06-18 76° 88° 4052 2837 1749 1057 707
06-19 74° 90° 4112 2887 1789 1089 734
06-20 73° 93° 4172 2938 1829 1122 762
06-21 71° 93° 4232 2987 1869 1154 789
06-22 71° 91° 4292 3037 1909 1185 815
06-23 67° 83° 4344 3080 1942 1210 835
06-24 60° 83° 4394 3119 1971 1232 852
06-25 63° 79° 4443 3158 2000 1253 868
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 75° 4491 3197 2028 1273 883
06-27 60° 76° 4538 3233 2055 1291 896
06-28 62° 79° 4586 3272 2084 1312 912
06-29 73° 84° 4643 3318 2120 1341 936
06-30 60° 78° 4689 3354 2146 1359 949
07-01 53° 74° 4731 3386 2168 1372 957
07-02 54° 82° 4777 3422 2194 1390 970
07-03 71° 85° 4832 3468 2230 1418 993
07-04 69° 80° 4885 3510 2262 1443 1012
07-05 63° 78° 4933 3549 2290 1463 1028
07-06 63° 80° 4983 3588 2320 1484 1044
07-07 61° 85° 5033 3629 2351 1507 1062
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 64° 87° 5087 3672 2384 1533 1082
07-09 69° 77° 5138 3714 2415 1556 1101
07-10 66° 76° 5188 3753 2445 1577 1117
07-11 60° 82° 5236 3792 2473 1598 1133
07-12 67° 84° 5290 3835 2507 1623 1153
07-13 65° 86° 5343 3879 2540 1649 1174
07-14 69° 80° 5396 3921 2573 1674 1194
07-15 69° 86° 5451 3967 2609 1701 1216
07-16 68° 81° 5504 4010 2642 1726 1236
07-17 64° 81° 5555 4050 2672 1749 1253
07-18 56° 74° 5598 4083 2695 1764 1263
07-19 56° 77° 5642 4117 2719 1780 1275
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 58° 79° 5689 4154 2746 1798 1288
07-21 60° 80° 5737 4192 2774 1818 1303
07-22 64° 82° 5787 4233 2804 1841 1321
07-23 64° 83° 5839 4274 2836 1864 1339
07-24 67° 79° 5889 4315 2867 1887 1357
07-25 60° 79° 5937 4352 2894 1907 1372
07-26 56° 80° 5983 4388 2920 1925 1385
07-27 54° 82° 6029 4425 2946 1943 1398
07-28 60° 85° 6080 4465 2977 1966 1415
07-29 71° 84° 6136 4511 3013 1993 1438
07-30 69° 87° 6192 4557 3049 2022 1461
07-31 71° 83° 6247 4602 3084 2049 1484
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 69° 82° 6301 4646 3118 2074 1504
08-02 68° 78° 6352 4687 3149 2098 1522
08-03 67° 85° 6406 4731 3183 2124 1544
08-04 66° 86° 6460 4775 3217 2150 1564
08-05 71° 85° 6516 4821 3253 2178 1588
08-06 66° 88° 6571 4866 3288 2205 1610
08-07 64° 75° 6619 4904 3316 2224 1624
08-08 63° 80° 6668 4943 3345 2246 1640
08-09 60° 76° 6714 4979 3371 2264 1653
08-10 55° 73° 6756 5011 3393 2278 1662
08-11 55° 75° 6799 5044 3416 2293 1673
08-12 54° 79° 6844 5079 3441 2309 1684
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 57° 81° 6891 5116 3468 2328 1698
08-14 58° 83° 6939 5154 3496 2349 1714
08-15 62° 74° 6985 5190 3522 2367 1726
08-16 66° 82° 7037 5233 3554 2391 1746
08-17 67° 79° 7088 5273 3585 2414 1763
08-18 66° 78° 7138 5313 3615 2435 1780
08-19 63° 73° 7184 5349 3641 2453 1793
08-20 52° 70° 7222 5378 3659 2464 1799
08-21 47° 73° 7260 5405 3677 2474 1804
08-22 49° 76° 7301 5436 3698 2486 1811
08-23 50° 80° 7343 5469 3721 2501 1821
08-24 56° 87° 7393 5508 3750 2523 1838
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 66° 89° 7449 5554 3786 2550 1860
08-26 69° 91° 7506 5601 3823 2580 1885
08-27 70° 94° 7566 5652 3863 2612 1912
08-28 71° 84° 7621 5697 3899 2639 1934
08-29 68° 85° 7676 5741 3933 2666 1956
08-30 68° 93° 7735 5790 3972 2696 1981
08-31 65° 79° 7785 5830 4002 2718 1998
09-01 59° 80° 7832 5868 4030 2738 2013
09-02 51° 73° 7873 5898 4050 2750 2020
09-03 46° 76° 7912 5927 4069 2761 2026
09-04 49° 83° 7956 5961 4093 2777 2037
09-05 57° 85° 8005 6000 4122 2799 2053
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 56° 72° 8047 6032 4144 2813 2062
09-07 47° 65° 8081 6056 4158 2819 2063
09-08 40° 68° 8113 6078 4170 2823 2063
09-09 49° 77° 8154 6110 4191 2836 2072
09-10 52° 81° 8199 6144 4216 2853 2083
09-11 52° 85° 8246 6181 4243 2871 2097
09-12 56° 87° 8295 6221 4272 2893 2114
09-13 59° 85° 8345 6261 4302 2915 2131
09-14 60° 87° 8397 6302 4334 2938 2149
09-15 60° 87° 8448 6344 4366 2962 2168
09-16 55° 85° 8497 6382 4394 2982 2183
09-17 54° 83° 8543 6418 4420 3001 2197
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 56° 85° 8592 6457 4449 3022 2212
09-19 58° 85° 8642 6497 4479 3043 2229
09-20 58° 88° 8693 6538 4510 3066 2247
09-21 57° 89° 8744 6579 4541 3090 2265
09-22 60° 80° 8792 6617 4569 3110 2280
09-23 62° 72° 8837 6652 4594 3127 2292
09-24 62° 73° 8882 6688 4620 3144 2305
09-25 62° 72° 8927 6723 4645 3161 2317
09-26 56° 73° 8970 6755 4667 3176 2326
09-27 62° 71° 9015 6790 4692 3193 2338
09-28 64° 73° 9061 6826 4718 3211 2351
09-29 66° 76° 9110 6865 4747 3232 2367
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 65° 71° 9156 6901 4773 3250 2380

 

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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