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Early Season Fungicide App for Dollar Spot Suppression (GDD 50)
through Sat, May. 16. 2026

 

GDD Total: 254 (Base 50) through Sat, May. 16, 2026

  

Kenosha, WI

        

Forecast »

“Flashback” to 2025

5/11

5/12

5/13

5/14

5/15

5/16

5/17

5/18

5/19

5/20

5/21

5/22

5/23

Done

201

Late

177

Target

140

Early

101

Under

0

 

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2025 & 2026

2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 31° 59° 23 13 3 0 0
02-16 33° 65° 50 30 10 0 0
02-17 37° 49° 71 41 11 0 0
02-18 46° 61° 103 63 23 4 0
02-19 35° 55° 126 76 26 4 0
02-20 29° 41° 139 79 26 4 0
02-21 25° 29° 144 79 26 4 0
02-22 18° 26° 144 79 26 4 0
02-23 18° 28° 145 79 26 4 0
02-24 18° 35° 150 79 26 4 0
02-25 21° 32° 155 79 26 4 0
02-26 14° 41° 160 79 26 4 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 26° 63° 183 92 29 4 0
02-28 23° 46° 195 94 29 4 0
03-01 14° 30° 195 94 29 4 0
03-02 20° 39° 203 94 29 4 0
03-03 27° 41° 215 96 29 4 0
03-04 29° 43° 229 101 29 4 0
03-05 38° 43° 247 109 29 4 0
03-06 38° 62° 276 128 37 4 0
03-07 40° 63° 305 147 46 5 0
03-08 32° 62° 330 162 51 5 0
03-09 50° 73° 369 191 71 17 6
03-10 38° 56° 394 206 76 17 6
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 32° 39° 408 210 76 17 6
03-12 29° 44° 423 215 76 17 6
03-13 33° 44° 439 221 76 17 6
03-14 25° 36° 447 221 76 17 6
03-15 31° 43° 462 226 76 17 6
03-16 17° 30° 464 226 76 17 6
03-17 9° 21° 464 226 76 17 6
03-18 17° 38° 469 226 76 17 6
03-19 30° 50° 487 233 76 17 6
03-20 34° 62° 513 249 82 17 6
03-21 35° 65° 540 266 89 17 6
03-22 31° 60° 563 280 92 17 6
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 28° 41° 575 282 92 17 6
03-24 28° 47° 591 288 92 17 6
03-25 34° 72° 622 309 103 20 6
03-26 33° 59° 646 323 107 20 6
03-27 29° 42° 660 327 107 20 6
03-28 21° 46° 672 329 107 20 6
03-29 39° 63° 701 348 116 21 6
03-30 44° 78° 740 377 135 32 12
03-31 39° 73° 774 401 149 38 13
04-01 33° 39° 788 405 149 38 13
04-02 33° 68° 816 423 158 38 13
04-03 38° 60° 843 440 165 38 13
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 39° 50° 866 452 167 38 13
04-05 35° 52° 887 464 168 38 13
04-06 30° 48° 904 471 168 38 13
04-07 25° 35° 912 471 168 38 13
04-08 31° 71° 941 490 177 39 13
04-09 42° 69° 974 513 191 45 14
04-10 36° 50° 995 524 191 45 14
04-11 31° 52° 1015 533 191 45 14
04-12 47° 80° 1056 565 213 58 22
04-13 60° 74° 1101 600 238 75 34
04-14 55° 83° 1148 637 265 94 48
04-15 59° 71° 1191 670 288 109 58
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 47° 66° 1226 694 302 116 60
04-17 45° 74° 1263 722 320 125 64
04-18 38° 64° 1292 741 329 126 64
04-19 33° 49° 1311 750 329 126 64
04-20 31° 46° 1328 757 329 126 64
04-21 43° 76° 1366 784 347 136 69
04-22 47° 64° 1399 808 360 141 70
04-23 46° 78° 1439 838 380 153 77
04-24 54° 70° 1479 868 400 165 83
04-25 42° 51° 1504 883 405 165 83
04-26 39° 52° 1527 896 408 165 83
04-27 42° 62° 1557 916 418 167 83
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 51° 64° 1593 942 434 175 86
04-29 40° 55° 1619 957 440 175 86
04-30 33° 49° 1637 966 440 175 86
05-01 34° 44° 1654 973 440 175 86
05-02 30° 52° 1673 982 440 175 86
05-03 43° 69° 1707 1006 453 180 87
05-04 47° 80° 1748 1037 475 194 95
05-05 47° 63° 1782 1060 488 199 95
05-06 34° 56° 1804 1073 491 199 95
05-07 32° 54° 1825 1084 492 199 95
05-08 32° 64° 1851 1100 497 199 95
05-09 51° 72° 1891 1129 517 211 102
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 35° 61° 1917 1146 523 211 102
05-11 39° 52° 1940 1159 527 211 102
05-12 35° 72° 1972 1181 538 214 102
05-13 44° 65° 2004 1203 550 218 102
05-14 36° 64° 2032 1221 558 218 102
05-15 49° 75° 2072 1251 578 230 109
05-16 61° 86° 2123 1292 610 254 127
05-17 55° 70° 2164 1323 630 266 135
05-18 55° 81° 2210 1359 656 284 148
05-19 66° 81° 2261 1400 688 308 166
05-20 45° 57° 2290 1419 697 309 166
05-21 41° 59° 2318 1437 704 309 166
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 45° 66° 2351 1460 718 314 167
05-23 49° 71° 2389 1488 736 324 172
05-24 53° 77° 2432 1521 759 339 182
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 25° 31° 6 0 0 0 0
02-16 8° 26° 6 0 0 0 0
02-17 -2° 7° 6 0 0 0 0
02-18 -10° 9° 6 0 0 0 0
02-19 -2° 12° 6 0 0 0 0
02-20 3° 25° 6 0 0 0 0
02-21 7° 26° 6 0 0 0 0
02-22 11° 30° 6 0 0 0 0
02-23 19° 37° 12 0 0 0 0
02-24 34° 51° 32 11 1 0 0
02-25 35° 52° 54 22 2 0 0
02-26 33° 42° 70 28 2 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 32° 44° 85 34 2 0 0
02-28 29° 58° 107 45 4 0 0
03-01 19° 34° 112 45 4 0 0
03-02 14° 35° 114 45 4 0 0
03-03 28° 48° 130 51 4 0 0
03-04 41° 51° 154 65 8 0 0
03-05 26° 51° 171 72 8 0 0
03-06 23° 39° 180 72 8 0 0
03-07 31° 37° 191 73 8 0 0
03-08 26° 50° 207 79 8 0 0
03-09 31° 60° 230 92 11 0 0
03-10 37° 68° 261 113 22 3 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 33° 58° 284 127 25 3 0
03-12 32° 44° 301 133 25 3 0
03-13 27° 55° 320 142 25 3 0
03-14 38° 75° 354 166 40 9 2
03-15 43° 66° 386 189 52 13 2
03-16 28° 41° 399 191 52 13 2
03-17 19° 53° 413 196 52 13 2
03-18 38° 57° 439 211 57 13 2
03-19 35° 42° 456 218 57 13 2
03-20 30° 42° 469 222 57 13 2
03-21 27° 58° 490 232 58 13 2
03-22 29° 51° 508 240 58 13 2
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 31° 47° 525 247 58 13 2
03-24 32° 46° 542 254 58 13 2
03-25 27° 48° 557 259 58 13 2
03-26 27° 46° 571 263 58 13 2
03-27 35° 57° 596 278 62 13 2
03-28 46° 78° 636 308 83 26 9
03-29 33° 70° 666 328 92 28 9
03-30 36° 47° 685 338 92 28 9
03-31 32° 45° 702 344 92 28 9
04-01 28° 42° 715 347 92 28 9
04-02 37° 60° 741 363 99 28 9
04-03 40° 60° 769 381 107 28 9
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 33° 45° 786 388 107 28 9
04-05 38° 53° 809 402 110 28 9
04-06 31° 47° 826 408 110 28 9
04-07 30° 41° 840 412 110 28 9
04-08 22° 40° 848 412 110 28 9
04-09 32° 44° 864 417 110 28 9
04-10 35° 39° 879 422 110 28 9
04-11 31° 51° 898 432 110 28 9
04-12 30° 58° 921 444 112 28 9
04-13 48° 61° 953 466 125 32 9
04-14 51° 64° 989 492 140 40 12
04-15 37° 52° 1011 505 143 40 12
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 30° 46° 1028 511 143 40 12
04-17 36° 62° 1055 528 150 40 12
04-18 53° 70° 1094 558 170 52 18
04-19 43° 66° 1127 580 182 56 18
04-20 39° 49° 1148 592 184 56 18
04-21 46° 56° 1178 611 193 57 18
04-22 36° 60° 1203 627 199 57 18
04-23 44° 69° 1238 652 214 64 20
04-24 48° 62° 1271 675 227 69 20
04-25 46° 54° 1299 693 235 69 20
04-26 41° 53° 1324 708 240 69 20
04-27 35° 62° 1351 724 246 69 20
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 47° 82° 1393 756 269 84 30
04-29 45° 79° 1433 786 289 96 37
04-30 38° 55° 1458 801 293 96 37
05-01 45° 57° 1487 820 302 97 37
05-02 43° 52° 1512 835 308 97 37
05-03 41° 49° 1535 848 311 97 37
05-04 40° 57° 1561 865 317 97 37
05-05 46° 54° 1589 883 325 97 37
05-06 44° 75° 1627 910 342 106 41
05-07 48° 58° 1657 931 353 109 41
05-08 41° 54° 1683 947 359 109 41
05-09 35° 61° 1710 963 365 109 41
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 45° 65° 1743 986 378 114 41
05-11 39° 65° 1772 1006 388 116 41
05-12 44° 74° 1809 1033 405 125 45
05-13 56° 72° 1852 1065 427 139 54
05-14 55° 75° 1894 1097 450 153 64
05-15 52° 82° 1939 1132 474 170 76
05-16 58° 86° 1989 1172 504 192 93
05-17 54° 67° 2028 1201 523 203 98
05-18 42° 56° 2055 1218 530 203 98
05-19 40° 48° 2077 1230 532 203 98
05-20 44° 49° 2101 1245 537 203 98
05-21 45° 48° 2126 1259 541 203 98
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 45° 54° 2153 1276 548 203 98
05-23 40° 58° 2180 1293 555 203 98
05-24 39° 60° 2207 1311 563 203 98
05-25 46° 63° 2240 1333 575 207 98
05-26 42° 64° 2270 1354 586 210 98
05-27 50° 66° 2306 1379 602 218 101
05-28 54° 59° 2341 1404 616 224 103
05-29 51° 68° 2379 1432 634 234 108
05-30 51° 72° 2418 1462 654 246 114
05-31 47° 60° 2449 1483 665 249 114
06-01 39° 63° 2479 1502 674 250 114
06-02 46° 83° 2521 1534 696 264 124
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 66° 86° 2575 1578 730 290 145
06-04 55° 70° 2615 1608 751 303 152
06-05 52° 73° 2656 1639 771 315 160
06-06 55° 74° 2698 1672 794 330 169
06-07 53° 74° 2740 1703 815 343 177
06-08 55° 80° 2785 1738 841 361 190
06-09 54° 68° 2824 1768 860 372 196
06-10 53° 76° 2867 1800 882 386 206
06-11 57° 91° 2919 1842 914 410 225
06-12 60° 72° 2963 1876 938 426 236
06-13 57° 66° 3002 1906 958 438 242
06-14 55° 68° 3042 1935 978 450 249
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 55° 75° 3085 1968 1000 464 259
06-16 59° 83° 3134 2007 1030 485 275
06-17 67° 93° 3192 2055 1068 516 300
06-18 65° 76° 3241 2094 1096 536 316
06-19 64° 86° 3294 2137 1130 562 336
06-20 66° 85° 3348 2181 1163 587 356
06-21 74° 94° 3409 2233 1205 621 385
06-22 78° 94° 3474 2287 1249 657 416
06-23 77° 94° 3537 2340 1293 693 447
06-24 73° 86° 3594 2388 1330 722 471
06-25 63° 74° 3641 2424 1356 740 485
06-26 67° 84° 3695 2468 1390 766 505
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 69° 86° 3750 2513 1425 793 528
06-28 62° 78° 3798 2551 1453 813 543
06-29 65° 91° 3854 2597 1489 841 566
06-30 69° 86° 3910 2643 1525 869 588
07-01 66° 84° 3963 2686 1558 894 608
07-02 66° 88° 4017 2731 1593 921 630
07-03 66° 87° 4072 2775 1627 947 652
07-04 70° 88° 4129 2822 1665 977 676
07-05 72° 90° 4188 2871 1703 1007 702
07-06 64° 80° 4238 2911 1733 1029 719
07-07 60° 75° 4283 2947 1759 1047 731
07-08 63° 81° 4333 2987 1789 1069 748
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 65° 74° 4381 3024 1817 1088 763
07-10 59° 76° 4427 3060 1842 1106 775
07-11 66° 80° 4478 3101 1873 1129 794
07-12 68° 83° 4531 3145 1907 1155 814
07-13 63° 78° 4580 3184 1936 1176 830
07-14 62° 84° 4631 3224 1966 1198 848
07-15 65° 85° 4684 3267 1999 1223 868
07-16 71° 88° 4741 3314 2037 1253 892
07-17 58° 69° 4783 3346 2058 1266 900
07-18 55° 73° 4825 3378 2080 1280 910
07-19 64° 82° 4876 3419 2111 1303 928
07-20 62° 73° 4921 3454 2136 1320 940
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 59° 75° 4966 3489 2161 1337 951
07-22 62° 82° 5016 3529 2191 1359 968
07-23 69° 91° 5074 3577 2229 1389 993
07-24 77° 90° 5135 3629 2271 1423 1022
07-25 70° 78° 5187 3670 2303 1447 1041
07-26 68° 82° 5240 3714 2336 1472 1061
07-27 68° 85° 5295 3758 2371 1498 1083
07-28 71° 91° 5354 3808 2410 1530 1109
07-29 69° 90° 5412 3855 2447 1559 1134
07-30 65° 74° 5460 3893 2475 1579 1148
07-31 63° 73° 5506 3929 2501 1597 1162
08-01 60° 73° 5550 3964 2526 1614 1173
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 54° 77° 5594 3997 2549 1629 1184
08-03 55° 77° 5638 4031 2573 1645 1195
08-04 58° 77° 5683 4067 2599 1663 1207
08-05 62° 80° 5732 4106 2628 1684 1223
08-06 62° 83° 5783 4146 2658 1706 1241
08-07 66° 88° 5838 4191 2694 1733 1263
08-08 71° 91° 5897 4240 2732 1764 1289
08-09 73° 93° 5958 4291 2774 1798 1317
08-10 70° 82° 6012 4335 2807 1823 1338
08-11 73° 85° 6069 4382 2845 1853 1362
08-12 69° 82° 6123 4426 2878 1878 1383
08-13 65° 80° 6174 4467 2909 1901 1400
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 61° 80° 6222 4506 2938 1922 1416
08-15 65° 86° 6276 4549 2971 1947 1436
08-16 72° 89° 6334 4597 3010 1977 1462
08-17 68° 76° 6384 4637 3039 1999 1479
08-18 67° 79° 6435 4678 3070 2022 1497
08-19 69° 75° 6485 4718 3101 2045 1514
08-20 65° 72° 6532 4755 3127 2063 1527
08-21 63° 75° 6579 4792 3154 2082 1541
08-22 59° 78° 6626 4829 3181 2101 1555
08-23 61° 79° 6674 4867 3209 2121 1571
08-24 55° 70° 6715 4898 3230 2134 1578
08-25 51° 68° 6752 4925 3248 2143 1583
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 49° 71° 6790 4953 3265 2153 1588
08-27 51° 75° 6831 4984 3286 2166 1596
08-28 58° 73° 6874 5018 3310 2182 1606
08-29 52° 67° 6911 5045 3327 2191 1610
08-30 56° 70° 6952 5076 3348 2204 1618
08-31 47° 72° 6990 5103 3366 2213 1623
09-01 51° 75° 7031 5134 3387 2226 1631
09-02 53° 76° 7073 5167 3409 2241 1640
09-03 54° 69° 7113 5196 3428 2252 1647
09-04 44° 63° 7144 5218 3440 2256 1647
09-05 53° 63° 7180 5244 3456 2264 1650
09-06 46° 64° 7214 5267 3469 2269 1650
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 44° 66° 7247 5290 3482 2274 1650
09-08 44° 70° 7281 5315 3497 2281 1652
09-09 50° 74° 7321 5345 3517 2293 1658
09-10 55° 75° 7364 5378 3540 2308 1668
09-11 57° 70° 7406 5409 3562 2321 1677
09-12 58° 77° 7451 5445 3587 2339 1690
09-13 63° 75° 7498 5481 3614 2358 1703
09-14 61° 77° 7545 5518 3640 2376 1717
09-15 58° 78° 7591 5554 3667 2394 1730
09-16 56° 81° 7637 5591 3693 2413 1743
09-17 55° 81° 7683 5626 3719 2431 1756
09-18 58° 83° 7732 5665 3747 2451 1772
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 64° 79° 7781 5704 3776 2472 1788
09-20 64° 75° 7828 5742 3804 2492 1803
09-21 64° 79° 7878 5781 3833 2513 1819
09-22 61° 77° 7925 5818 3861 2532 1833
09-23 61° 69° 7968 5851 3884 2548 1843
09-24 59° 68° 8010 5883 3905 2561 1852
09-25 57° 71° 8052 5915 3927 2575 1861
09-26 54° 81° 8097 5951 3953 2593 1874
09-27 56° 85° 8146 5989 3982 2614 1889
09-28 58° 74° 8190 6024 4006 2630 1900
09-29 54° 82° 8236 6060 4032 2648 1913
09-30 57° 78° 8282 6095 4058 2665 1926
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55

 

Latest Updates

February 16th, 2026Welcome to the 2026 GDD Tracking Season

Although Punxsutawney Phil saw his shadow predicting six more weeks of winter, GDDTracker will start 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. As spring turns to summer, 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 2026!


 

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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