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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
forecast for Sat, Apr. 4. 2026

 

Forecasted GDD Total: 292 (Base 32) through Sat, Apr. 4, 2026

  

WI

        

Forecast »

“Flashback” to 2025

3/27

3/28

3/29

3/30

3/31

4/1

4/2

4/3

4/4

4/5

4/6

4/7

4/8

Done

801

Late

500

Optimum

250

Early

171

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 33° 44° 16 6 0 0 0
02-16 34° 52° 37 17 1 0 0
02-17 35° 42° 54 24 1 0 0
02-18 39° 49° 76 36 3 0 0
02-19 35° 43° 93 43 3 0 0
02-20 31° 39° 106 46 3 0 0
02-21 27° 30° 113 46 3 0 0
02-22 23° 27° 116 46 3 0 0
02-23 22° 25° 117 46 3 0 0
02-24 24° 37° 126 46 3 0 0
02-25 26° 35° 135 46 3 0 0
02-26 24° 38° 144 46 3 0 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 49° 163 55 3 0 0
02-28 26° 43° 176 58 3 0 0
03-01 26° 29° 181 58 3 0 0
03-02 29° 36° 192 59 3 0 0
03-03 34° 36° 205 62 3 0 0
03-04 31° 38° 217 64 3 0 0
03-05 36° 37° 232 68 3 0 0
03-06 36° 50° 253 80 4 0 0
03-07 38° 51° 276 92 7 0 0
03-08 34° 49° 295 101 7 0 0
03-09 43° 51° 320 117 12 0 0
03-10 34° 45° 338 124 12 0 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 32° 38° 351 128 12 0 0
03-12 32° 39° 364 131 12 0 0
03-13 36° 41° 381 138 12 0 0
03-14 31° 35° 392 139 12 0 0
03-15 33° 37° 405 141 12 0 0
03-16 23° 33° 411 141 12 0 0
03-17 17° 24° 411 141 12 0 0
03-18 25° 39° 422 142 12 0 0
03-19 36° 41° 438 148 12 0 0
03-20 36° 49° 459 159 13 0 0
03-21 36° 56° 476 166 13 0 0
03-22 33° 55° 498 178 15 0 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 31° 34° 509 179 15 0 0
03-24 33° 39° 522 182 15 0 0
03-25 38° 54° 546 196 19 0 0
03-26 33° 52° 567 207 20 0 0
03-27 31° 37° 579 209 20 0 0
03-28 26° 40° 590 210 20 0 0
03-29 39° 46° 611 221 20 0 0
03-30 41° 53° 635 235 25 0 0
03-31 35° 59° 660 250 30 0 0
04-01 34° 36° 673 253 30 0 0
04-02 35° 54° 696 266 32 0 0
04-03 42° 47° 718 278 35 0 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 40° 52° 742 292 39 0 0
04-05 36° 45° 761 301 39 0 0
04-06 38° 44° 780 310 39 0 0
04-07 31° 37° 792 312 39 0 0
04-08 33° 51° 812 322 39 0 0
04-09 46° 53° 840 340 46 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 29° 34° 10 0 0 0 0
02-16 17° 31° 12 0 0 0 0
02-17 5° 15° 12 0 0 0 0
02-18 3° 12° 12 0 0 0 0
02-19 10° 15° 12 0 0 0 0
02-20 13° 26° 12 0 0 0 0
02-21 19° 27° 13 0 0 0 0
02-22 19° 32° 16 0 0 0 0
02-23 28° 37° 27 1 0 0 0
02-24 37° 43° 46 9 0 0 0
02-25 33° 43° 61 15 0 0 0
02-26 32° 38° 74 18 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 36° 40° 90 24 0 0 0
02-28 35° 46° 109 32 0 0 0
03-01 21° 35° 114 32 0 0 0
03-02 23° 34° 121 32 0 0 0
03-03 34° 40° 136 37 0 0 0
03-04 38° 42° 154 45 0 0 0
03-05 29° 42° 167 49 0 0 0
03-06 27° 38° 178 49 0 0 0
03-07 33° 37° 191 52 0 0 0
03-08 27° 43° 204 55 0 0 0
03-09 36° 47° 223 65 0 0 0
03-10 38° 51° 246 78 3 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 36° 50° 267 88 4 0 0
03-12 36° 38° 282 93 4 0 0
03-13 34° 42° 298 100 4 0 0
03-14 38° 49° 320 111 5 0 0
03-15 40° 50° 343 124 8 0 0
03-16 30° 39° 355 127 8 0 0
03-17 26° 43° 368 129 8 0 0
03-18 35° 44° 385 137 8 0 0
03-19 36° 39° 401 142 8 0 0
03-20 33° 38° 414 146 8 0 0
03-21 32° 47° 432 153 8 0 0
03-22 30° 46° 447 159 8 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 33° 40° 462 164 8 0 0
03-24 33° 40° 477 169 8 0 0
03-25 34° 39° 492 174 8 0 0
03-26 34° 37° 506 177 8 0 0
03-27 37° 43° 524 185 8 0 0
03-28 40° 60° 552 203 17 0 0
03-29 31° 57° 574 215 18 0 0
03-30 35° 40° 589 221 18 0 0
03-31 33° 39° 603 225 18 0 0
04-01 33° 40° 617 229 18 0 0
04-02 37° 53° 640 242 21 0 0
04-03 40° 53° 665 257 26 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 36° 39° 681 262 26 0 0
04-05 37° 44° 699 271 26 0 0
04-06 36° 39° 715 276 26 0 0
04-07 33° 41° 730 281 26 0 0
04-08 27° 36° 739 281 26 0 0
04-09 34° 39° 754 286 26 0 0
04-10 36° 38° 769 291 26 0 0
04-11 36° 39° 785 297 26 0 0
04-12 32° 44° 801 303 26 0 0
04-13 42° 44° 822 314 27 0 0
04-14 43° 51° 847 329 32 0 0
04-15 37° 45° 866 338 32 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 35° 41° 882 344 32 0 0
04-17 38° 47° 902 355 33 0 0
04-18 42° 57° 930 372 40 0 0
04-19 37° 56° 955 387 45 0 0
04-20 39° 44° 974 396 45 0 0
04-21 43° 49° 998 410 48 0 0
04-22 39° 45° 1018 420 48 0 0
04-23 40° 50° 1041 433 52 0 0
04-24 39° 48° 1063 445 53 0 0
04-25 41° 44° 1083 456 54 0 0
04-26 41° 43° 1104 466 54 0 0
04-27 38° 44° 1123 475 54 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 41° 59° 1151 493 62 0 0
04-29 38° 61° 1178 511 70 0 0
04-30 39° 43° 1198 520 70 0 0
05-01 41° 49° 1220 533 73 0 0
05-02 40° 44° 1240 542 73 0 0
05-03 40° 42° 1259 552 73 0 0
05-04 41° 45° 1281 563 74 0 0
05-05 42° 44° 1302 574 75 0 0
05-06 42° 55° 1329 591 82 0 0
05-07 41° 46° 1350 602 83 0 0
05-08 42° 44° 1370 613 84 0 0
05-09 38° 43° 1389 621 84 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 41° 53° 1414 637 89 0 0
05-11 42° 46° 1436 648 91 0 0
05-12 41° 49° 1459 661 94 0 0
05-13 47° 52° 1486 679 101 0 0
05-14 45° 53° 1513 696 108 0 0
05-15 44° 66° 1546 718 121 5 0
05-16 51° 66° 1583 745 138 14 4
05-17 48° 59° 1615 767 149 18 4
05-18 44° 51° 1640 782 155 18 4
05-19 41° 48° 1663 795 157 18 4
05-20 44° 48° 1687 809 161 18 4
05-21 44° 46° 1710 822 165 18 4
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 44° 47° 1734 836 169 18 4
05-23 43° 48° 1757 850 172 18 4
05-24 43° 47° 1780 862 175 18 4
05-25 43° 48° 1803 876 178 18 4
05-26 42° 49° 1827 889 182 18 4
05-27 48° 53° 1856 908 190 18 4
05-28 47° 50° 1882 925 197 18 4
05-29 45° 53° 1910 942 204 18 4
05-30 47° 60° 1941 964 216 22 4
05-31 47° 53° 1969 981 224 22 4
06-01 45° 49° 1994 997 229 22 4
06-02 48° 57° 2024 1017 239 24 4
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 55° 67° 2064 1046 258 35 10
06-04 49° 61° 2097 1069 271 40 10
06-05 51° 58° 2129 1092 284 45 10
06-06 54° 57° 2163 1115 297 50 11
06-07 53° 56° 2195 1137 310 54 11
06-08 54° 58° 2229 1161 324 61 12
06-09 54° 59° 2263 1186 338 67 13
06-10 54° 59° 2298 1210 353 74 15
06-11 54° 72° 2339 1241 374 87 23
06-12 56° 63° 2376 1269 391 96 27
06-13 56° 58° 2412 1294 406 103 29
06-14 55° 58° 2446 1319 421 110 31
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 56° 58° 2481 1344 436 117 33
06-16 56° 64° 2519 1372 454 127 38
06-17 60° 74° 2564 1406 479 144 50
06-18 56° 66° 2603 1435 498 155 56
06-19 60° 69° 2646 1468 520 169 66
06-20 61° 71° 2689 1502 544 185 76
06-21 66° 76° 2738 1540 573 206 92
06-22 68° 74° 2788 1580 602 227 108
06-23 69° 75° 2838 1620 632 249 125
06-24 61° 70° 2881 1653 655 264 136
06-25 61° 65° 2921 1684 676 277 143
06-26 64° 71° 2967 1719 702 294 156
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 67° 76° 3016 1759 731 316 172
06-28 65° 69° 3061 1794 756 333 184
06-29 67° 73° 3109 1832 784 353 199
06-30 68° 73° 3158 1870 813 374 215
07-01 69° 73° 3207 1910 842 395 231
07-02 70° 76° 3258 1950 873 418 249
07-03 69° 74° 3308 1990 903 439 266
07-04 69° 77° 3359 2031 934 463 284
07-05 71° 77° 3411 2073 966 487 303
07-06 65° 73° 3458 2110 993 506 317
07-07 64° 68° 3502 2145 1017 522 328
07-08 66° 74° 3550 2182 1045 542 343
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 67° 70° 3597 2219 1071 560 356
07-10 65° 70° 3642 2254 1097 578 369
07-11 68° 72° 3690 2292 1125 598 384
07-12 69° 76° 3741 2333 1155 620 401
07-13 67° 73° 3789 2371 1183 640 417
07-14 67° 74° 3837 2410 1212 661 432
07-15 70° 75° 3888 2450 1242 683 449
07-16 72° 77° 3940 2492 1275 707 469
07-17 63° 71° 3985 2527 1300 725 481
07-18 64° 72° 4031 2563 1326 742 494
07-19 69° 75° 4081 2603 1355 764 510
07-20 67° 71° 4128 2640 1382 783 524
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 67° 70° 4174 2676 1409 802 538
07-22 68° 72° 4222 2715 1437 822 553
07-23 70° 78° 4274 2757 1469 846 572
07-24 73° 75° 4326 2799 1501 870 591
07-25 70° 74° 4376 2838 1531 892 608
07-26 71° 77° 4428 2880 1563 916 627
07-27 71° 74° 4479 2921 1593 938 645
07-28 72° 79° 4532 2965 1627 964 665
07-29 73° 79° 4586 3008 1661 990 686
07-30 68° 75° 4636 3048 1691 1011 703
07-31 69° 73° 4685 3087 1719 1032 719
08-01 69° 71° 4733 3125 1747 1052 733
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 66° 72° 4779 3162 1774 1071 747
08-03 65° 71° 4826 3198 1800 1089 761
08-04 67° 72° 4873 3236 1828 1109 775
08-05 70° 73° 4923 3275 1858 1130 792
08-06 70° 74° 4973 3315 1887 1152 808
08-07 71° 77° 5025 3357 1919 1176 828
08-08 72° 77° 5077 3400 1952 1201 847
08-09 74° 79° 5132 3444 1987 1228 869
08-10 71° 78° 5184 3487 2019 1252 888
08-11 73° 78° 5238 3530 2052 1277 909
08-12 71° 76° 5289 3571 2084 1301 927
08-13 72° 75° 5340 3613 2115 1324 945
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 69° 75° 5390 3653 2145 1346 962
08-15 72° 77° 5443 3695 2177 1370 981
08-16 74° 78° 5497 3739 2211 1396 1003
08-17 72° 75° 5548 3781 2243 1420 1021
08-18 72° 77° 5601 3824 2276 1445 1041
08-19 71° 75° 5652 3865 2307 1468 1059
08-20 70° 72° 5701 3903 2336 1489 1075
08-21 70° 74° 5751 3943 2365 1510 1092
08-22 69° 76° 5801 3983 2396 1533 1109
08-23 69° 76° 5852 4024 2426 1555 1126
08-24 63° 71° 5896 4059 2451 1572 1138
08-25 58° 69° 5938 4090 2472 1585 1147
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 61° 70° 5982 4124 2496 1601 1157
08-27 62° 73° 6027 4159 2522 1619 1170
08-28 64° 71° 6073 4195 2547 1636 1183
08-29 61° 66° 6114 4226 2569 1650 1191
08-30 64° 68° 6158 4261 2593 1666 1202
08-31 62° 69° 6202 4294 2616 1681 1213
09-01 64° 72° 6247 4330 2642 1699 1225
09-02 64° 71° 6293 4366 2668 1717 1238
09-03 62° 70° 6337 4400 2692 1733 1249
09-04 52° 66° 6374 4427 2709 1742 1253
09-05 60° 64° 6415 4457 2729 1754 1260
09-06 54° 65° 6452 4484 2746 1763 1265
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 53° 65° 6489 4511 2764 1772 1269
09-08 58° 66° 6529 4541 2784 1785 1276
09-09 62° 68° 6572 4574 2807 1799 1286
09-10 64° 67° 6616 4608 2830 1815 1296
09-11 63° 67° 6658 4641 2853 1830 1306
09-12 62° 69° 6702 4674 2877 1845 1317
09-13 65° 70° 6747 4710 2902 1863 1329
09-14 67° 70° 6794 4746 2928 1881 1342
09-15 67° 70° 6840 4782 2955 1900 1356
09-16 65° 70° 6886 4818 2980 1917 1369
09-17 65° 71° 6932 4854 3007 1935 1382
09-18 65° 72° 6978 4891 3033 1954 1395
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 70° 72° 7027 4929 3061 1974 1411
09-20 66° 72° 7074 4966 3088 1993 1425
09-21 68° 74° 7123 5005 3118 2015 1441
09-22 67° 73° 7171 5043 3146 2034 1456
09-23 67° 70° 7217 5079 3172 2053 1469
09-24 64° 68° 7261 5114 3196 2069 1480
09-25 63° 69° 7305 5148 3220 2085 1491
09-26 62° 71° 7350 5182 3244 2101 1503
09-27 63° 76° 7398 5220 3272 2121 1517
09-28 66° 69° 7443 5255 3298 2139 1530
09-29 63° 71° 7488 5290 3322 2155 1541
09-30 66° 70° 7534 5326 3348 2173 1554
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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