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Relative Flowering Times for Broadleaf Weeds (GDD 50)
forecast for Thu, Dec. 18. 2025

 
  

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 22° 33° 14 0 0 0 0
02-17 5° 20° 14 0 0 0 0
02-18 2° 16° 14 0 0 0 0
02-19 11° 19° 14 0 0 0 0
02-20 10° 22° 14 0 0 0 0
02-21 19° 30° 17 0 0 0 0
02-22 14° 31° 17 0 0 0 0
02-23 22° 40° 26 0 0 0 0
02-24 33° 51° 46 10 0 0 0
02-25 33° 56° 69 23 3 0 0
02-26 27° 39° 80 24 3 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 50° 99 33 3 0 0
02-28 29° 58° 121 45 4 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 20° 40° 129 45 4 0 0
03-02 16° 32° 131 45 4 0 0
03-03 22° 38° 139 45 4 0 0
03-04 36° 56° 163 59 8 0 0
03-05 33° 52° 183 69 9 0 0
03-06 26° 36° 193 69 9 0 0
03-07 27° 39° 203 70 9 0 0
03-08 29° 41° 216 73 9 0 0
03-09 31° 55° 237 84 10 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 35° 65° 265 102 18 0 0
03-11 43° 65° 297 124 30 4 0
03-12 32° 56° 319 136 32 4 0
03-13 27° 64° 342 149 35 4 0
03-14 37° 76° 377 174 50 11 2
03-15 55° 70° 418 204 70 23 9
03-16 34° 57° 441 218 74 23 9
03-17 29° 46° 457 224 74 23 9
03-18 38° 69° 488 245 85 27 9
03-19 53° 68° 526 273 104 37 14
03-20 29° 52° 545 282 104 37 14
03-21 23° 54° 561 288 104 37 14
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 31° 47° 578 295 104 37 14
03-23 26° 45° 592 299 104 37 14
03-24 35° 46° 611 307 104 37 14
03-25 25° 49° 625 312 104 37 14
03-26 24° 49° 640 317 104 37 14
03-27 30° 59° 663 330 106 37 14
03-28 47° 76° 702 359 126 48 21
03-29 57° 72° 745 391 148 63 30
03-30 56° 70° 785 422 169 76 38
03-31 34° 57° 809 436 172 76 38
04-01 29° 47° 825 442 172 76 38
04-02 36° 68° 855 462 182 77 38
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 47° 63° 888 485 195 83 38
04-04 41° 53° 913 500 200 83 38
04-05 40° 52° 937 514 205 83 38
04-06 38° 45° 957 524 205 83 38
04-07 31° 49° 975 532 205 83 38
04-08 21° 40° 983 532 205 83 38
04-09 25° 45° 996 534 205 83 38
04-10 37° 43° 1014 542 205 83 38
04-11 33° 49° 1033 551 205 83 38
04-12 28° 56° 1053 561 205 83 38
04-13 41° 61° 1082 580 214 84 38
04-14 47° 70° 1118 607 230 92 42
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 41° 52° 1142 621 234 92 42
04-16 32° 53° 1163 631 235 92 42
04-17 33° 64° 1189 648 241 92 42
04-18 54° 82° 1235 684 267 110 55
04-19 49° 69° 1272 711 284 119 59
04-20 45° 62° 1304 733 296 123 59
04-21 50° 64° 1339 758 311 130 61
04-22 42° 68° 1372 780 324 135 61
04-23 50° 77° 1413 812 345 148 69
04-24 49° 82° 1457 845 369 164 80
04-25 58° 73° 1501 879 393 179 91
04-26 46° 60° 1532 900 404 183 91
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 39° 65° 1562 920 414 185 91
04-28 44° 78° 1601 949 433 195 97
04-29 56° 84° 1648 987 460 215 111
04-30 44° 65° 1680 1009 472 219 111
05-01 49° 75° 1720 1039 492 231 118
05-02 58° 73° 1764 1073 516 247 129
05-03 49° 57° 1795 1094 527 250 129
05-04 43° 51° 1820 1109 532 250 129
05-05 48° 63° 1854 1133 546 256 130
05-06 52° 66° 1891 1160 563 265 134
05-07 48° 74° 1930 1189 582 276 140
05-08 49° 59° 1962 1211 594 280 140
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 37° 66° 1991 1230 603 281 140
05-10 41° 79° 2029 1258 621 291 145
05-11 49° 73° 2068 1286 640 302 151
05-12 48° 77° 2108 1317 660 314 158
05-13 62° 69° 2152 1351 684 330 169
05-14 60° 73° 2197 1385 709 347 180
05-15 62° 82° 2247 1426 739 369 198
05-16 63° 84° 2299 1467 771 392 216
05-17 59° 65° 2338 1497 790 404 223
05-18 53° 65° 2376 1524 808 413 227
05-19 45° 68° 2410 1549 822 420 229
05-20 46° 56° 2439 1568 831 421 229
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 49° 62° 2473 1591 845 427 229
05-22 46° 57° 2503 1611 855 429 229
05-23 42° 61° 2532 1631 864 430 229
05-24 40° 65° 2563 1651 875 432 229
05-25 48° 66° 2597 1676 889 439 231
05-26 42° 70° 2631 1700 903 445 232
05-27 54° 69° 2671 1730 923 457 239
05-28 55° 61° 2707 1755 939 465 242
05-29 51° 66° 2744 1782 956 474 246
05-30 52° 74° 2785 1813 977 487 254
05-31 50° 67° 2821 1840 993 495 257
06-01 41° 70° 2854 1863 1006 500 257
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 40° 80° 2892 1891 1024 510 262
06-03 58° 87° 2943 1931 1055 533 280
06-04 69° 83° 2997 1975 1089 559 301
06-05 62° 71° 3041 2010 1113 575 312
06-06 62° 69° 3085 2043 1137 591 323
06-07 59° 77° 3131 2079 1163 609 336
06-08 59° 76° 3176 2115 1188 626 348
06-09 61° 76° 3223 2151 1215 645 362
06-10 54° 75° 3265 2184 1237 659 371
06-11 59° 84° 3315 2223 1267 680 387
06-12 65° 85° 3367 2266 1299 705 407
06-13 61° 73° 3412 2300 1324 722 419
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 59° 66° 3452 2331 1344 734 426
06-15 60° 79° 3500 2368 1372 754 441
06-16 61° 80° 3548 2407 1400 774 456
06-17 67° 85° 3602 2451 1434 800 477
06-18 66° 85° 3656 2494 1468 826 498
06-19 65° 77° 3705 2534 1497 847 514
06-20 63° 82° 3756 2574 1528 870 532
06-21 68° 91° 3813 2622 1565 899 556
06-22 76° 92° 3875 2674 1607 933 585
06-23 75° 92° 3937 2725 1649 967 614
06-24 75° 92° 3998 2777 1690 1000 642
06-25 73° 92° 4059 2827 1731 1033 670
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 72° 90° 4118 2876 1770 1064 696
06-27 72° 90° 4177 2925 1809 1095 722
06-28 72° 87° 4234 2973 1846 1124 746
06-29 64° 89° 4289 3018 1881 1151 768
06-30 73° 84° 4346 3064 1918 1180 792
07-01 70° 84° 4401 3109 1953 1207 814
07-02 61° 85° 4452 3151 1984 1230 832
07-03 67° 88° 4508 3196 2020 1258 855
07-04 66° 89° 4564 3242 2056 1286 878
07-05 69° 90° 4621 3290 2093 1315 902
07-06 71° 89° 4680 3338 2132 1346 928
07-07 69° 77° 4731 3379 2163 1369 946
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 61° 85° 4782 3420 2194 1392 964
07-09 70° 84° 4836 3465 2228 1418 985
07-10 67° 87° 4891 3510 2263 1445 1007
07-11 68° 89° 4948 3556 2300 1474 1031
07-12 73° 88° 5006 3605 2338 1504 1056
07-13 70° 86° 5062 3650 2374 1532 1079
07-14 67° 86° 5116 3695 2408 1558 1100
07-15 61° 89° 5169 3738 2441 1583 1120
07-16 74° 86° 5227 3786 2479 1613 1145
07-17 69° 82° 5281 3829 2513 1639 1166
07-18 65° 75° 5329 3867 2541 1659 1181
07-19 62° 82° 5379 3908 2571 1681 1198
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 69° 77° 5430 3949 2602 1704 1216
07-21 62° 80° 5479 3988 2631 1725 1232
07-22 60° 82° 5528 4026 2660 1746 1248
07-23 60° 88° 5580 4069 2692 1770 1267
07-24 73° 94° 5641 4120 2733 1803 1295
07-25 73° 84° 5697 4166 2769 1831 1318
07-26 71° 85° 5753 4212 2805 1859 1341
07-27 73° 86° 5811 4259 2843 1889 1366
07-28 73° 87° 5869 4307 2881 1919 1391
07-29 71° 90° 5927 4355 2919 1949 1416
07-30 72° 88° 5985 4403 2957 1979 1441
07-31 61° 71° 6029 4437 2981 1995 1452
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 57° 75° 6073 4471 3005 2011 1463
08-02 55° 76° 6116 4505 3028 2026 1473
08-03 53° 78° 6160 4538 3052 2042 1484
08-04 57° 79° 6206 4575 3078 2060 1497
08-05 61° 83° 6256 4615 3108 2082 1514
08-06 66° 82° 6308 4657 3140 2106 1533
08-07 65° 85° 6362 4700 3174 2131 1553
08-08 66° 87° 6416 4745 3208 2158 1575
08-09 68° 89° 6473 4791 3245 2187 1599
08-10 68° 89° 6530 4838 3282 2216 1623
08-11 70° 89° 6587 4886 3319 2245 1647
08-12 70° 90° 6645 4934 3357 2275 1672
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 69° 86° 6701 4979 3393 2303 1695
08-14 63° 85° 6753 5021 3425 2327 1714
08-15 63° 88° 6806 5065 3458 2352 1734
08-16 69° 88° 6863 5111 3495 2381 1758
08-17 71° 86° 6919 5158 3531 2409 1781
08-18 63° 84° 6971 5200 3563 2433 1800
08-19 67° 85° 7025 5243 3597 2459 1821
08-20 68° 73° 7073 5282 3625 2479 1836
08-21 64° 72° 7120 5318 3652 2498 1850
08-22 58° 79° 7167 5355 3679 2517 1864
08-23 61° 78° 7214 5393 3706 2536 1878
08-24 55° 74° 7257 5426 3729 2551 1888
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 54° 71° 7298 5457 3750 2564 1896
08-26 50° 70° 7336 5485 3768 2574 1901
08-27 45° 74° 7373 5512 3785 2583 1905
08-28 54° 73° 7415 5544 3807 2597 1914
08-29 51° 69° 7453 5572 3825 2607 1919
08-30 47° 73° 7491 5600 3843 2617 1924
08-31 47° 75° 7530 5629 3862 2628 1930
09-01 48° 79° 7572 5660 3884 2642 1939
09-02 52° 80° 7616 5695 3908 2658 1950
09-03 52° 80° 7661 5729 3933 2674 1961
09-04 50° 68° 7698 5756 3950 2684 1966
09-05 49° 72° 7736 5785 3968 2694 1971
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 50° 66° 7772 5811 3984 2702 1974
09-07 44° 68° 7807 5835 3999 2708 1975
09-08 40° 70° 7840 5858 4012 2714 1976
09-09 44° 75° 7877 5885 4029 2723 1980
09-10 51° 80° 7920 5919 4052 2738 1990
09-11 51° 81° 7965 5953 4077 2754 2001
09-12 50° 82° 8008 5987 4100 2770 2012
09-13 53° 75° 8051 6019 4123 2785 2022
09-14 61° 84° 8101 6060 4153 2807 2039
09-15 56° 86° 8150 6099 4182 2828 2055
09-16 55° 84° 8198 6136 4210 2847 2069
09-17 56° 85° 8246 6175 4238 2868 2085
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 54° 87° 8295 6213 4267 2889 2101
09-19 56° 88° 8344 6253 4296 2910 2117
09-20 61° 87° 8397 6295 4329 2934 2136
09-21 64° 82° 8447 6336 4359 2957 2154
09-22 61° 71° 8491 6370 4383 2973 2165
09-23 60° 78° 8538 6407 4410 2992 2179
09-24 64° 78° 8587 6446 4439 3013 2195
09-25 61° 74° 8633 6481 4465 3030 2207
09-26 53° 78° 8676 6515 4488 3046 2218
09-27 52° 85° 8723 6551 4515 3065 2232
09-28 56° 88° 8773 6591 4545 3087 2249
09-29 57° 85° 8822 6630 4574 3107 2264
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 52° 83° 8867 6666 4599 3125 2277
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 29° 43° 14 4 0 0 0
02-16 24° 30° 19 4 0 0 0
02-17 12° 24° 19 4 0 0 0
02-18 15° 34° 21 4 0 0 0
02-19 15° 43° 28 4 0 0 0
02-20 21° 53° 43 9 0 0 0
02-21 34° 62° 69 25 6 0 0
02-22 40° 51° 93 39 10 0 0
02-23 32° 51° 112 48 10 0 0
02-24 20° 35° 118 48 10 0 0
02-25 24° 52° 134 54 10 0 0
02-26 32° 65° 160 71 16 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 54° 68° 199 100 35 11 6
02-28 25° 62° 221 112 37 11 6
02-29 22° 38° 229 112 37 11 6
03-01 26° 44° 242 115 37 11 6
03-02 38° 54° 266 129 41 11 6
03-03 36° 65° 294 147 49 12 6
03-04 49° 71° 333 176 68 22 11
03-05 52° 64° 369 202 84 30 14
03-06 43° 49° 393 215 88 30 14
03-07 37° 46° 412 225 88 30 14
03-08 41° 54° 438 240 93 30 14
03-09 33° 54° 459 252 95 30 14
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 31° 38° 471 254 95 30 14
03-11 27° 58° 492 265 95 30 14
03-12 43° 68° 526 288 109 35 15
03-13 45° 71° 562 315 125 44 18
03-14 53° 67° 600 343 143 54 23
03-15 41° 57° 627 359 150 54 23
03-16 34° 60° 652 375 155 54 23
03-17 31° 43° 667 380 155 54 23
03-18 28° 34° 676 380 155 54 23
03-19 28° 53° 695 389 155 54 23
03-20 23° 39° 704 389 155 54 23
03-21 19° 39° 711 389 155 54 23
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 27° 47° 726 394 155 54 23
03-23 27° 39° 738 395 155 54 23
03-24 25° 45° 751 398 155 54 23
03-25 35° 66° 779 417 164 54 23
03-26 42° 62° 809 436 174 56 23
03-27 31° 41° 823 440 174 56 23
03-28 27° 50° 840 447 174 56 23
03-29 32° 58° 862 460 176 56 23
03-30 46° 65° 896 483 190 62 24
03-31 42° 54° 922 500 196 62 24
04-01 41° 47° 944 511 198 62 24
04-02 41° 52° 969 526 203 62 24
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 36° 42° 985 533 203 62 24
04-04 35° 44° 1003 540 203 62 24
04-05 37° 47° 1023 550 203 62 24
04-06 31° 55° 1044 561 204 62 24
04-07 34° 59° 1068 575 208 62 24
04-08 43° 73° 1104 601 224 70 27
04-09 48° 73° 1143 630 243 80 32
04-10 46° 66° 1177 654 257 87 34
04-11 47° 57° 1207 674 267 89 34
04-12 45° 56° 1236 693 276 89 34
04-13 40° 65° 1266 713 286 92 34
04-14 52° 78° 1309 746 309 106 44
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 50° 68° 1346 773 326 115 48
04-16 50° 74° 1386 803 346 128 55
04-17 59° 69° 1428 835 368 141 64
04-18 51° 66° 1464 862 385 150 67
04-19 48° 61° 1497 884 397 154 67
04-20 39° 50° 1519 896 399 154 67
04-21 39° 44° 1539 906 399 154 67
04-22 34° 62° 1565 922 405 154 67
04-23 48° 55° 1594 941 415 156 67
04-24 40° 51° 1618 955 418 156 67
04-25 31° 54° 1638 966 419 156 67
04-26 35° 66° 1667 984 428 157 67
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 56° 77° 1711 1019 452 173 79
04-28 62° 79° 1760 1057 481 193 94
04-29 62° 74° 1806 1093 507 212 107
04-30 55° 70° 1846 1123 527 224 114
05-01 56° 79° 1892 1159 552 241 127
05-02 50° 81° 1935 1192 576 257 137
05-03 58° 74° 1979 1226 600 273 148
05-04 56° 74° 2022 1259 623 288 158
05-05 55° 65° 2060 1287 641 298 163
05-06 52° 66° 2097 1315 658 307 168
05-07 54° 78° 2142 1349 682 323 179
05-08 57° 78° 2187 1384 708 340 191
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 51° 65° 2223 1410 724 349 194
05-10 48° 64° 2257 1435 738 355 196
05-11 50° 61° 2291 1458 752 361 196
05-12 43° 75° 2328 1485 769 369 200
05-13 59° 79° 2375 1522 795 388 214
05-14 57° 69° 2416 1553 817 402 222
05-15 54° 70° 2456 1583 837 414 229
05-16 53° 76° 2498 1615 859 428 238
05-17 63° 75° 2545 1652 886 447 252
05-18 59° 81° 2593 1690 914 467 267
05-19 61° 86° 2645 1732 946 491 286
05-20 63° 87° 2698 1775 979 516 306
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 64° 87° 2751 1819 1012 541 327
05-22 68° 83° 2805 1862 1045 566 347
05-23 55° 80° 2850 1897 1070 583 359
05-24 56° 83° 2897 1935 1098 603 374
05-25 61° 79° 2945 1972 1126 623 388
05-26 53° 79° 2989 2006 1150 639 399
05-27 60° 67° 3031 2038 1171 652 408
05-28 54° 70° 3071 2068 1192 664 415
05-29 53° 70° 3110 2097 1211 676 421
05-30 53° 69° 3149 2126 1230 687 427
05-31 49° 76° 3189 2157 1250 699 435
06-01 53° 79° 3233 2191 1274 715 446
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 61° 73° 3279 2226 1299 732 458
06-03 54° 82° 3325 2262 1325 750 471
06-04 63° 85° 3377 2304 1357 774 490
06-05 68° 80° 3428 2346 1389 798 509
06-06 62° 78° 3477 2384 1417 818 524
06-07 58° 77° 3522 2419 1443 836 536
06-08 52° 79° 3566 2453 1466 851 547
06-09 55° 76° 3609 2486 1490 867 557
06-10 55° 70° 3650 2517 1510 879 565
06-11 47° 74° 3688 2545 1529 890 570
06-12 58° 85° 3738 2585 1559 912 587
06-13 68° 90° 3795 2632 1596 941 611
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 65° 84° 3848 2675 1628 965 631
06-15 59° 81° 3896 2713 1657 986 646
06-16 58° 91° 3949 2756 1689 1010 666
06-17 74° 94° 4010 2808 1731 1044 695
06-18 75° 88° 4070 2857 1771 1076 721
06-19 74° 89° 4130 2907 1811 1107 748
06-20 73° 93° 4191 2958 1851 1140 776
06-21 71° 93° 4250 3007 1891 1172 802
06-22 71° 91° 4309 3057 1930 1203 829
06-23 67° 82° 4362 3099 1963 1228 848
06-24 60° 82° 4411 3139 1992 1249 865
06-25 63° 79° 4460 3177 2021 1270 880
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 74° 4508 3215 2049 1290 895
06-27 60° 76° 4555 3252 2075 1308 909
06-28 62° 79° 4603 3290 2104 1329 924
06-29 73° 85° 4660 3337 2141 1357 948
06-30 61° 77° 4706 3373 2167 1376 961
07-01 53° 73° 4747 3404 2188 1389 969
07-02 53° 80° 4792 3439 2213 1406 981
07-03 70° 85° 4847 3484 2248 1433 1003
07-04 69° 81° 4900 3527 2281 1458 1023
07-05 63° 79° 4949 3567 2310 1479 1040
07-06 63° 80° 4999 3606 2340 1500 1056
07-07 61° 84° 5050 3647 2370 1523 1074
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 64° 87° 5103 3690 2404 1548 1094
07-09 70° 78° 5155 3732 2436 1573 1113
07-10 66° 76° 5204 3771 2465 1594 1129
07-11 60° 82° 5253 3810 2494 1615 1145
07-12 68° 84° 5307 3855 2528 1641 1167
07-13 66° 87° 5362 3899 2563 1667 1188
07-14 69° 81° 5415 3942 2596 1692 1208
07-15 69° 86° 5471 3988 2631 1720 1231
07-16 69° 82° 5524 4032 2665 1746 1252
07-17 65° 82° 5576 4073 2696 1769 1270
07-18 56° 74° 5619 4106 2719 1784 1280
07-19 55° 77° 5663 4140 2743 1800 1291
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 57° 79° 5709 4176 2769 1818 1304
07-21 60° 80° 5757 4214 2797 1838 1319
07-22 64° 82° 5808 4255 2828 1861 1337
07-23 64° 83° 5859 4296 2860 1885 1355
07-24 67° 80° 5910 4338 2891 1908 1374
07-25 61° 79° 5958 4376 2919 1928 1389
07-26 56° 80° 6004 4412 2945 1946 1402
07-27 54° 81° 6050 4447 2971 1964 1414
07-28 60° 86° 6101 4488 3002 1987 1432
07-29 71° 84° 6157 4534 3038 2014 1455
07-30 70° 87° 6213 4580 3074 2043 1478
07-31 70° 84° 6268 4626 3109 2070 1501
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 69° 83° 6322 4669 3143 2096 1521
08-02 69° 78° 6374 4711 3174 2119 1540
08-03 66° 85° 6427 4755 3208 2145 1561
08-04 66° 86° 6481 4799 3242 2171 1582
08-05 71° 85° 6538 4845 3279 2199 1605
08-06 66° 88° 6593 4890 3313 2226 1627
08-07 64° 75° 6640 4927 3341 2246 1641
08-08 63° 80° 6690 4967 3370 2267 1658
08-09 60° 77° 6736 5003 3397 2286 1671
08-10 55° 73° 6778 5035 3419 2300 1680
08-11 55° 76° 6821 5068 3442 2315 1690
08-12 54° 80° 6866 5103 3467 2331 1702
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 58° 81° 6913 5140 3494 2351 1716
08-14 59° 83° 6962 5179 3523 2371 1732
08-15 61° 74° 7008 5215 3548 2389 1745
08-16 66° 83° 7060 5257 3581 2414 1764
08-17 67° 79° 7111 5298 3612 2437 1782
08-18 66° 78° 7161 5338 3642 2459 1799
08-19 64° 73° 7207 5375 3668 2477 1813
08-20 52° 70° 7246 5403 3687 2488 1818
08-21 47° 73° 7284 5431 3705 2498 1823
08-22 49° 75° 7324 5461 3725 2510 1830
08-23 50° 80° 7367 5494 3748 2525 1840
08-24 55° 87° 7416 5533 3777 2546 1856
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 66° 89° 7472 5579 3812 2573 1879
08-26 68° 91° 7529 5626 3850 2603 1903
08-27 70° 94° 7589 5677 3890 2635 1931
08-28 71° 84° 7645 5722 3925 2662 1953
08-29 69° 84° 7700 5767 3960 2689 1975
08-30 68° 93° 7758 5815 3999 2720 2000
08-31 65° 79° 7808 5855 4029 2742 2017
09-01 59° 81° 7856 5893 4057 2762 2032
09-02 51° 73° 7896 5923 4077 2774 2039
09-03 46° 75° 7935 5952 4096 2785 2045
09-04 49° 83° 7979 5986 4120 2801 2056
09-05 57° 85° 8028 6025 4149 2822 2072
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 56° 72° 8070 6057 4171 2836 2081
09-07 47° 66° 8105 6082 4185 2842 2083
09-08 40° 68° 8137 6104 4198 2847 2083
09-09 49° 77° 8178 6135 4219 2860 2091
09-10 51° 81° 8223 6170 4243 2876 2103
09-11 53° 85° 8270 6207 4271 2896 2117
09-12 56° 88° 8320 6247 4300 2917 2134
09-13 58° 85° 8369 6287 4330 2939 2150
09-14 59° 87° 8420 6328 4361 2962 2168
09-15 59° 87° 8472 6369 4392 2985 2187
09-16 55° 85° 8520 6407 4420 3005 2202
09-17 55° 83° 8566 6444 4447 3024 2215
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 56° 85° 8615 6482 4476 3045 2231
09-19 58° 84° 8664 6521 4505 3066 2247
09-20 58° 88° 8715 6562 4536 3089 2265
09-21 57° 89° 8766 6604 4567 3112 2283
09-22 59° 80° 8814 6641 4595 3132 2298
09-23 62° 71° 8859 6676 4620 3149 2310
09-24 62° 73° 8904 6712 4645 3166 2322
09-25 62° 73° 8950 6747 4670 3183 2334
09-26 57° 72° 8992 6779 4693 3198 2344
09-27 63° 72° 9037 6815 4718 3215 2356
09-28 64° 73° 9084 6851 4745 3234 2370
09-29 67° 75° 9133 6890 4774 3254 2386
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 65° 72° 9179 6927 4800 3273 2399

 

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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