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MSU Annual Bluegrass Seedhead Embark Timer (GDD 22)
forecast for Tue, Dec. 16. 2025

 
  

Chicago, IL

        

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° 34° 7 0 0 0 0
02-16 13° 30° 7 0 0 0 0
02-17 2° 11° 7 0 0 0 0
02-18 -5° 15° 7 0 0 0 0
02-19 5° 18° 7 0 0 0 0
02-20 4° 25° 7 0 0 0 0
02-21 10° 29° 7 0 0 0 0
02-22 15° 36° 11 0 0 0 0
02-23 24° 45° 24 3 0 0 0
02-24 38° 54° 48 17 4 0 0
02-25 37° 54° 71 31 8 0 0
02-26 35° 49° 91 41 8 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 35° 49° 111 51 8 0 0
02-28 33° 57° 134 63 11 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 22° 38° 142 63 11 0 0
03-02 17° 37° 147 63 11 0 0
03-03 29° 47° 163 69 11 0 0
03-04 43° 46° 186 82 14 0 0
03-05 30° 49° 203 89 14 0 0
03-06 27° 40° 215 91 14 0 0
03-07 32° 38° 228 94 14 0 0
03-08 30° 49° 246 102 14 0 0
03-09 32° 58° 269 115 17 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 39° 68° 300 136 28 3 0
03-11 36° 58° 325 151 33 3 0
03-12 35° 50° 346 162 33 3 0
03-13 33° 58° 369 175 37 3 0
03-14 43° 77° 407 204 55 14 6
03-15 46° 69° 443 229 70 21 8
03-16 30° 44° 458 234 70 21 8
03-17 26° 53° 475 241 70 21 8
03-18 45° 73° 512 268 87 30 12
03-19 39° 53° 536 282 91 30 12
03-20 31° 43° 550 287 91 30 12
03-21 30° 58° 573 299 93 30 12
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 34° 52° 594 310 94 30 12
03-23 34° 48° 612 319 94 30 12
03-24 34° 49° 632 328 94 30 12
03-25 30° 49° 649 335 94 30 12
03-26 30° 51° 668 344 94 30 12
03-27 40° 54° 693 359 99 30 12
03-28 47° 78° 734 390 120 43 19
03-29 53° 69° 773 419 139 54 26
03-30 46° 76° 812 448 158 65 32
03-31 35° 45° 830 456 158 65 32
04-01 31° 45° 846 462 158 65 32
04-02 40° 68° 878 484 170 69 32
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 43° 62° 909 505 181 72 32
04-04 38° 47° 930 516 182 72 32
04-05 41° 51° 954 530 186 72 32
04-06 35° 45° 972 538 186 72 32
04-07 31° 44° 987 543 186 72 32
04-08 28° 42° 1000 546 186 72 32
04-09 33° 41° 1015 551 186 72 32
04-10 38° 43° 1034 560 186 72 32
04-11 35° 50° 1055 571 186 72 32
04-12 34° 60° 1079 585 191 72 32
04-13 51° 63° 1114 610 206 79 34
04-14 53° 63° 1151 637 222 87 37
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 39° 54° 1175 651 227 87 37
04-16 34° 48° 1194 660 227 87 37
04-17 38° 64° 1223 679 236 88 37
04-18 57° 76° 1267 713 260 104 48
04-19 42° 68° 1300 736 273 109 48
04-20 46° 60° 1331 757 284 112 48
04-21 49° 60° 1363 779 296 116 48
04-22 40° 73° 1398 804 311 123 50
04-23 54° 77° 1441 837 334 138 60
04-24 50° 74° 1482 868 354 150 68
04-25 47° 56° 1511 887 364 152 68
04-26 42° 51° 1535 902 368 152 68
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 36° 68° 1565 921 378 154 68
04-28 51° 83° 1611 957 404 171 80
04-29 51° 76° 1652 988 425 185 89
04-30 45° 60° 1682 1009 435 187 89
05-01 52° 68° 1721 1037 453 197 94
05-02 45° 59° 1750 1057 463 199 94
05-03 44° 52° 1776 1072 469 199 94
05-04 45° 55° 1804 1090 477 199 94
05-05 47° 59° 1835 1112 488 202 94
05-06 45° 76° 1874 1140 507 213 99
05-07 48° 71° 1911 1168 524 222 104
05-08 45° 56° 1940 1186 533 223 104
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 38° 63° 1968 1204 541 223 104
05-10 45° 73° 2005 1231 558 232 108
05-11 42° 68° 2039 1255 572 237 108
05-12 49° 74° 2078 1284 591 249 115
05-13 60° 75° 2124 1320 617 267 127
05-14 56° 76° 2168 1354 640 282 138
05-15 59° 93° 2221 1397 674 308 159
05-16 61° 86° 2273 1439 706 332 178
05-17 54° 70° 2313 1469 726 344 184
05-18 47° 61° 2345 1491 738 347 184
05-19 44° 52° 2371 1507 744 347 184
05-20 49° 55° 2401 1527 754 350 184
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 49° 53° 2431 1547 763 351 184
05-22 47° 54° 2459 1565 772 352 184
05-23 41° 60° 2488 1584 781 352 184
05-24 43° 63° 2519 1605 791 355 184
05-25 51° 64° 2554 1630 807 362 186
05-26 45° 65° 2586 1652 819 367 186
05-27 52° 66° 2623 1679 836 375 190
05-28 55° 61° 2659 1705 852 383 193
05-29 52° 70° 2698 1734 871 394 199
05-30 52° 74° 2739 1765 891 407 207
05-31 50° 63° 2773 1789 906 414 209
06-01 43° 65° 2805 1811 918 418 209
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 46° 84° 2848 1844 941 433 218
06-03 67° 87° 2903 1889 976 459 240
06-04 57° 74° 2947 1923 1000 475 251
06-05 54° 68° 2985 1952 1018 486 257
06-06 59° 76° 3031 1987 1044 504 269
06-07 55° 76° 3075 2021 1067 519 280
06-08 58° 80° 3122 2058 1095 538 294
06-09 55° 72° 3163 2089 1116 552 303
06-10 55° 78° 3207 2124 1140 568 314
06-11 63° 91° 3263 2169 1176 595 336
06-12 63° 79° 3312 2208 1205 616 352
06-13 61° 70° 3355 2241 1228 632 363
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 61° 72° 3400 2276 1253 649 375
06-15 57° 78° 3446 2312 1279 666 387
06-16 60° 85° 3497 2353 1309 689 405
06-17 71° 90° 3555 2401 1348 720 430
06-18 67° 81° 3607 2443 1380 744 449
06-19 65° 81° 3658 2484 1411 767 468
06-20 67° 83° 3711 2527 1444 792 488
06-21 75° 93° 3774 2580 1486 826 517
06-22 78° 94° 3837 2633 1530 862 548
06-23 77° 94° 3901 2687 1574 897 578
06-24 75° 92° 3963 2739 1616 931 607
06-25 70° 83° 4018 2784 1651 958 629
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 75° 92° 4079 2835 1692 991 657
06-27 76° 87° 4138 2885 1731 1023 684
06-28 68° 84° 4192 2928 1765 1049 705
06-29 71° 89° 4250 2976 1803 1079 730
06-30 73° 88° 4309 3025 1842 1110 755
07-01 70° 85° 4365 3071 1878 1137 778
07-02 69° 88° 4421 3117 1914 1165 801
07-03 70° 90° 4479 3165 1952 1196 826
07-04 74° 90° 4539 3215 1992 1228 853
07-05 73° 92° 4600 3266 2033 1260 881
07-06 69° 85° 4655 3311 2068 1287 903
07-07 65° 81° 4706 3352 2099 1310 921
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 66° 86° 4760 3396 2133 1337 942
07-09 69° 82° 4814 3440 2167 1362 963
07-10 66° 82° 4865 3482 2198 1386 982
07-11 70° 88° 4922 3528 2235 1415 1006
07-12 71° 81° 4976 3572 2269 1441 1026
07-13 67° 81° 5028 3615 2301 1465 1046
07-14 62° 86° 5080 3657 2333 1489 1065
07-15 68° 90° 5137 3704 2370 1518 1089
07-16 73° 89° 5196 3752 2409 1549 1115
07-17 64° 75° 5244 3790 2437 1569 1130
07-18 59° 80° 5292 3828 2464 1588 1144
07-19 72° 82° 5347 3873 2499 1615 1166
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 68° 75° 5396 3912 2529 1636 1182
07-21 64° 82° 5447 3953 2560 1660 1200
07-22 67° 86° 5501 3997 2594 1686 1221
07-23 71° 93° 5561 4047 2634 1717 1248
07-24 72° 94° 5621 4097 2674 1750 1276
07-25 74° 81° 5677 4143 2710 1777 1298
07-26 72° 82° 5732 4188 2745 1805 1321
07-27 73° 86° 5790 4236 2783 1834 1345
07-28 76° 89° 5851 4287 2823 1867 1373
07-29 70° 91° 5909 4335 2862 1898 1398
07-30 70° 80° 5962 4378 2895 1923 1419
07-31 67° 74° 6011 4417 2924 1943 1434
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 62° 75° 6057 4453 2950 1962 1447
08-02 58° 78° 6103 4489 2976 1980 1460
08-03 59° 78° 6150 4526 3003 1998 1474
08-04 63° 80° 6199 4565 3032 2020 1490
08-05 63° 82° 6249 4606 3062 2042 1508
08-06 65° 86° 6303 4649 3096 2067 1528
08-07 71° 88° 6360 4696 3133 2097 1552
08-08 72° 90° 6419 4746 3172 2128 1579
08-09 73° 92° 6480 4796 3213 2160 1606
08-10 76° 89° 6540 4846 3253 2193 1633
08-11 74° 88° 6599 4895 3292 2224 1660
08-12 73° 85° 6656 4942 3329 2253 1684
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 69° 82° 6710 4986 3363 2278 1704
08-14 65° 81° 6761 5027 3394 2301 1722
08-15 66° 90° 6817 5073 3430 2329 1745
08-16 74° 94° 6879 5125 3472 2363 1774
08-17 70° 80° 6932 5168 3505 2389 1794
08-18 71° 83° 6987 5213 3540 2416 1817
08-19 71° 76° 7039 5255 3572 2439 1835
08-20 68° 74° 7088 5294 3601 2460 1851
08-21 63° 74° 7134 5330 3627 2479 1864
08-22 64° 78° 7183 5369 3656 2500 1880
08-23 66° 82° 7235 5411 3688 2523 1899
08-24 57° 72° 7277 5444 3710 2538 1909
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 54° 69° 7317 5473 3730 2549 1915
08-26 52° 72° 7357 5503 3750 2561 1922
08-27 52° 76° 7399 5535 3772 2575 1931
08-28 61° 74° 7444 5571 3797 2593 1944
08-29 55° 68° 7484 5600 3817 2604 1950
08-30 61° 72° 7529 5635 3841 2621 1962
08-31 53° 75° 7571 5667 3864 2635 1971
09-01 57° 76° 7615 5701 3888 2652 1982
09-02 57° 78° 7661 5737 3914 2669 1995
09-03 59° 72° 7704 5770 3937 2685 2006
09-04 49° 66° 7740 5796 3953 2692 2008
09-05 56° 67° 7779 5825 3972 2704 2014
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 47° 66° 7814 5850 3987 2710 2016
09-07 45° 68° 7848 5874 4001 2717 2017
09-08 47° 72° 7885 5901 4018 2726 2022
09-09 48° 75° 7925 5931 4038 2738 2029
09-10 58° 81° 7973 5969 4066 2757 2043
09-11 63° 78° 8021 6007 4094 2778 2059
09-12 60° 83° 8070 6047 4123 2799 2075
09-13 63° 77° 8118 6084 4151 2819 2090
09-14 64° 81° 8168 6124 4181 2841 2107
09-15 61° 82° 8218 6164 4211 2862 2123
09-16 60° 81° 8266 6202 4239 2883 2139
09-17 59° 81° 8314 6240 4267 2903 2154
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 59° 85° 8365 6281 4297 2925 2171
09-19 64° 88° 8419 6325 4332 2951 2192
09-20 66° 78° 8468 6365 4361 2973 2209
09-21 66° 80° 8520 6406 4393 2996 2227
09-22 66° 80° 8571 6447 4424 3019 2245
09-23 65° 75° 8619 6485 4452 3040 2260
09-24 62° 71° 8664 6520 4477 3056 2272
09-25 60° 73° 8708 6555 4501 3073 2284
09-26 55° 83° 8755 6591 4528 3092 2298
09-27 60° 86° 8806 6632 4559 3115 2316
09-28 60° 78° 8853 6669 4586 3134 2330
09-29 59° 87° 8904 6710 4617 3157 2348
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 61° 81° 8953 6749 4646 3177 2363
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 32° 43° 16 6 0 0 0
02-16 28° 32° 23 6 0 0 0
02-17 13° 28° 23 6 0 0 0
02-18 21° 44° 34 6 0 0 0
02-19 23° 50° 48 11 0 0 0
02-20 28° 56° 69 21 0 0 0
02-21 44° 64° 101 43 12 4 0
02-22 44° 57° 129 62 21 5 0
02-23 28° 50° 146 68 21 5 0
02-24 22° 34° 152 68 21 5 0
02-25 31° 59° 175 81 24 5 0
02-26 38° 70° 207 103 36 9 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 54° 71° 248 134 57 21 8
02-28 22° 57° 265 142 57 21 8
02-29 20° 44° 276 142 57 21 8
03-01 31° 45° 292 148 57 21 8
03-02 34° 58° 316 163 61 21 8
03-03 43° 71° 351 187 76 28 10
03-04 53° 70° 391 217 95 40 16
03-05 38° 57° 417 233 101 40 16
03-06 37° 46° 436 242 101 40 16
03-07 36° 47° 456 252 101 40 16
03-08 41° 45° 477 263 102 40 16
03-09 33° 44° 493 270 102 40 16
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 46° 510 276 102 40 16
03-11 31° 66° 536 293 109 40 16
03-12 46° 70° 572 319 125 48 19
03-13 48° 66° 607 343 140 54 21
03-14 43° 63° 638 364 151 58 21
03-15 37° 48° 659 375 152 58 21
03-16 38° 56° 684 390 157 58 21
03-17 31° 41° 698 394 157 58 21
03-18 26° 34° 706 394 157 58 21
03-19 30° 56° 727 405 158 58 21
03-20 30° 43° 742 410 158 58 21
03-21 25° 39° 752 410 158 58 21
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 31° 39° 766 414 158 58 21
03-23 30° 37° 777 415 158 58 21
03-24 31° 48° 795 423 158 58 21
03-25 44° 63° 826 444 169 61 21
03-26 35° 55° 849 457 172 61 21
03-27 29° 42° 863 461 172 61 21
03-28 30° 50° 881 468 172 61 21
03-29 32° 51° 900 478 172 61 21
03-30 41° 60° 929 497 180 61 21
03-31 38° 50° 950 508 182 61 21
04-01 42° 47° 973 521 184 61 21
04-02 36° 52° 995 533 187 61 21
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 34° 38° 1009 537 187 61 21
04-04 36° 41° 1025 543 187 61 21
04-05 37° 46° 1044 552 187 61 21
04-06 31° 49° 1063 561 187 61 21
04-07 38° 50° 1085 572 188 61 21
04-08 47° 69° 1120 598 204 69 24
04-09 50° 62° 1155 623 219 75 25
04-10 42° 64° 1186 644 230 79 25
04-11 48° 55° 1216 664 240 81 25
04-12 48° 62° 1249 687 253 86 25
04-13 41° 70° 1282 710 266 91 26
04-14 60° 78° 1330 747 293 110 40
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 48° 68° 1365 773 309 118 42
04-16 50° 72° 1404 802 328 129 48
04-17 59° 67° 1445 833 349 142 56
04-18 47° 56° 1475 853 359 143 56
04-19 41° 56° 1502 869 365 143 56
04-20 35° 46° 1520 878 365 143 56
04-21 32° 47° 1538 885 365 143 56
04-22 39° 65° 1568 906 376 146 56
04-23 55° 61° 1604 932 392 154 60
04-24 35° 51° 1625 943 393 154 60
04-25 31° 55° 1646 954 394 154 60
04-26 42° 58° 1675 972 402 154 60
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 58° 77° 1720 1008 428 172 72
04-28 61° 74° 1766 1044 454 189 85
04-29 59° 68° 1807 1075 475 203 93
04-30 47° 72° 1845 1103 493 213 98
05-01 60° 75° 1891 1139 519 230 111
05-02 52° 76° 1933 1171 541 244 120
05-03 51° 64° 1968 1196 556 252 122
05-04 47° 79° 2009 1227 577 265 130
05-05 50° 63° 2043 1251 591 271 132
05-06 47° 68° 2079 1277 607 278 134
05-07 56° 74° 2122 1310 630 293 144
05-08 52° 76° 2164 1342 652 308 153
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 51° 62° 2198 1366 666 314 154
05-10 47° 66° 2233 1390 680 320 156
05-11 50° 66° 2268 1416 696 328 158
05-12 48° 82° 2311 1449 719 343 169
05-13 62° 80° 2361 1488 748 364 185
05-14 52° 61° 2395 1513 763 371 186
05-15 52° 66° 2432 1540 780 380 190
05-16 51° 73° 2472 1570 800 392 198
05-17 59° 79° 2519 1607 827 411 211
05-18 57° 84° 2568 1646 856 432 227
05-19 61° 74° 2614 1682 882 450 240
05-20 59° 84° 2663 1721 911 471 256
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 59° 88° 2715 1763 943 495 275
05-22 63° 78° 2764 1802 972 515 291
05-23 56° 77° 2809 1836 996 532 303
05-24 62° 77° 2856 1874 1024 551 317
05-25 58° 71° 2898 1906 1046 566 326
05-26 56° 73° 2940 1938 1068 580 335
05-27 58° 72° 2983 1971 1091 595 345
05-28 55° 70° 3024 2002 1112 608 353
05-29 53° 66° 3062 2029 1129 617 358
05-30 45° 68° 3096 2054 1144 624 359
05-31 49° 78° 3137 2085 1165 637 368
06-01 60° 66° 3179 2117 1187 650 376
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 58° 72° 3222 2150 1210 666 386
06-03 55° 86° 3271 2189 1239 686 402
06-04 68° 86° 3326 2234 1274 713 424
06-05 69° 78° 3377 2275 1305 737 442
06-06 63° 78° 3426 2314 1334 758 458
06-07 58° 78° 3472 2350 1360 776 471
06-08 56° 77° 3517 2385 1385 792 483
06-09 54° 79° 3562 2420 1410 809 495
06-10 54° 66° 3600 2448 1428 819 500
06-11 48° 77° 3641 2478 1448 832 508
06-12 65° 90° 3696 2524 1484 860 530
06-13 72° 89° 3755 2573 1523 890 556
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 65° 84° 3807 2615 1555 915 575
06-15 60° 85° 3858 2655 1585 937 593
06-16 68° 93° 3916 2704 1624 968 618
06-17 75° 95° 3979 2757 1667 1003 648
06-18 77° 92° 4042 2810 1710 1038 678
06-19 76° 92° 4104 2862 1752 1072 707
06-20 66° 84° 4158 2905 1785 1097 728
06-21 65° 93° 4215 2953 1823 1126 752
06-22 72° 92° 4275 3003 1863 1159 779
06-23 70° 80° 4328 3046 1896 1183 799
06-24 64° 84° 4380 3088 1928 1208 818
06-25 72° 83° 4436 3134 1964 1235 841
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 69° 85° 4491 3179 1999 1263 863
06-27 61° 72° 4536 3213 2023 1279 875
06-28 63° 75° 4582 3250 2050 1298 889
06-29 72° 88° 4640 3298 2088 1328 913
06-30 60° 77° 4686 3334 2114 1345 926
07-01 54° 72° 4727 3365 2135 1358 934
07-02 65° 85° 4779 3407 2167 1383 954
07-03 73° 90° 4839 3457 2207 1414 980
07-04 69° 82° 4893 3501 2241 1440 1001
07-05 68° 83° 4946 3544 2274 1465 1021
07-06 64° 79° 4995 3583 2303 1487 1038
07-07 64° 85° 5048 3626 2336 1511 1057
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 69° 84° 5102 3670 2370 1538 1078
07-09 70° 79° 5155 3713 2403 1563 1098
07-10 66° 81° 5206 3754 2434 1586 1116
07-11 66° 79° 5257 3795 2465 1609 1134
07-12 65° 83° 5309 3837 2497 1633 1153
07-13 67° 88° 5365 3883 2533 1660 1176
07-14 68° 86° 5419 3927 2567 1687 1198
07-15 68° 89° 5476 3974 2604 1716 1221
07-16 68° 85° 5530 4018 2638 1742 1243
07-17 69° 83° 5584 4062 2672 1768 1263
07-18 62° 74° 5630 4098 2698 1786 1276
07-19 57° 79° 5676 4134 2724 1803 1289
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 61° 79° 5724 4172 2752 1823 1304
07-21 64° 82° 5775 4213 2783 1847 1322
07-22 65° 83° 5827 4255 2815 1870 1341
07-23 66° 85° 5880 4298 2848 1896 1361
07-24 67° 74° 5929 4337 2877 1917 1377
07-25 63° 77° 5977 4375 2905 1937 1392
07-26 57° 81° 6024 4412 2932 1956 1406
07-27 62° 85° 6075 4453 2963 1979 1424
07-28 69° 81° 6128 4496 2996 2004 1444
07-29 72° 81° 6183 4541 3031 2031 1466
07-30 69° 89° 6240 4588 3068 2060 1491
07-31 71° 92° 6300 4638 3108 2091 1517
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 73° 86° 6357 4685 3145 2121 1541
08-02 70° 83° 6412 4729 3179 2147 1563
08-03 70° 88° 6468 4776 3216 2176 1586
08-04 70° 90° 6526 4824 3254 2206 1611
08-05 74° 88° 6585 4873 3293 2237 1637
08-06 68° 75° 6635 4913 3323 2259 1654
08-07 65° 77° 6684 4952 3352 2280 1670
08-08 61° 84° 6735 4992 3382 2302 1688
08-09 61° 74° 6780 5028 3408 2320 1700
08-10 55° 76° 6823 5061 3431 2335 1710
08-11 56° 79° 6869 5097 3457 2353 1723
08-12 57° 80° 6916 5134 3484 2371 1737
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 61° 83° 6965 5173 3513 2393 1754
08-14 62° 84° 7017 5215 3545 2416 1772
08-15 67° 74° 7065 5253 3573 2437 1787
08-16 67° 84° 7119 5297 3607 2463 1808
08-17 69° 78° 7170 5338 3638 2486 1826
08-18 67° 76° 7220 5378 3668 2507 1843
08-19 63° 75° 7267 5415 3695 2526 1857
08-20 58° 70° 7309 5447 3717 2540 1866
08-21 53° 74° 7350 5478 3738 2554 1875
08-22 52° 79° 7394 5512 3762 2569 1885
08-23 55° 81° 7440 5548 3788 2588 1898
08-24 60° 89° 7493 5590 3820 2612 1918
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 71° 91° 7552 5639 3859 2643 1944
08-26 77° 94° 7615 5693 3903 2679 1974
08-27 74° 96° 7679 5746 3946 2714 2005
08-28 72° 82° 7734 5792 3982 2741 2027
08-29 70° 84° 7789 5837 4017 2768 2049
08-30 72° 85° 7845 5883 4053 2797 2072
08-31 61° 83° 7895 5923 4083 2819 2089
09-01 63° 75° 7942 5960 4110 2838 2103
09-02 57° 73° 7986 5993 4133 2853 2114
09-03 54° 77° 8029 6027 4157 2869 2124
09-04 55° 82° 8076 6063 4183 2887 2138
09-05 62° 87° 8128 6106 4216 2912 2157
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 59° 74° 8172 6140 4240 2928 2168
09-07 48° 65° 8207 6165 4255 2935 2170
09-08 47° 72° 8245 6193 4273 2944 2175
09-09 55° 80° 8290 6228 4298 2962 2187
09-10 54° 82° 8336 6264 4324 2980 2200
09-11 56° 86° 8385 6303 4353 3001 2216
09-12 60° 86° 8436 6344 4384 3024 2234
09-13 64° 83° 8488 6386 4416 3047 2253
09-14 65° 85° 8540 6428 4448 3072 2273
09-15 65° 87° 8594 6472 4482 3098 2294
09-16 61° 88° 8647 6515 4515 3123 2313
09-17 59° 82° 8696 6554 4544 3143 2329
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 60° 86° 8747 6595 4575 3166 2347
09-19 59° 88° 8798 6636 4606 3190 2365
09-20 70° 89° 8856 6684 4644 3219 2390
09-21 61° 91° 8909 6727 4677 3245 2411
09-22 65° 73° 8956 6764 4704 3264 2424
09-23 61° 65° 8997 6795 4725 3277 2432
09-24 62° 67° 9040 6828 4748 3291 2442
09-25 57° 74° 9083 6861 4771 3307 2452
09-26 54° 75° 9125 6893 4793 3321 2461
09-27 63° 72° 9171 6928 4818 3338 2474
09-28 65° 70° 9216 6964 4844 3356 2486
09-29 67° 71° 9264 7001 4871 3375 2501
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 62° 76° 9311 7039 4899 3394 2515

 

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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