Please Note

The GDD models have only been “ground-truthed” in the Great Lakes region. Use of models outside of this region, including the North East, Great Plains and Transition Zones, should be used with caution. We do not recommend the GDD models we use for the mid/southern transition zone and southern states.

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MSU Proxy/Primo Seedhead Timer (GDD 32)
through Wed, Apr. 1. 2026

 

GDD Total: 324 (Base 32) through Wed, Apr. 1, 2026

  

Minneapolis, MN

        

Forecast »

“Flashback” to 2025

3/28

3/29

3/30

3/31

4/1

4/2

4/3

4/4

4/5

4/6

4/7

4/8

4/9

Done

651

Over

501

Target

220

Close

121

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 25° 53° 17 7 0 0 0
02-16 35° 55° 40 20 3 0 0
02-17 33° 50° 60 30 3 0 0
02-18 28° 44° 74 34 3 0 0
02-19 27° 34° 83 34 3 0 0
02-20 17° 30° 84 34 3 0 0
02-21 10° 19° 84 34 3 0 0
02-22 6° 14° 84 34 3 0 0
02-23 3° 21° 84 34 3 0 0
02-24 17° 37° 89 34 3 0 0
02-25 11° 23° 89 34 3 0 0
02-26 16° 42° 96 34 3 0 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 25° 50° 112 40 3 0 0
02-28 17° 23° 112 40 3 0 0
03-01 13° 30° 112 40 3 0 0
03-02 22° 41° 122 40 3 0 0
03-03 34° 52° 143 51 4 0 0
03-04 30° 47° 159 57 4 0 0
03-05 38° 52° 182 70 7 0 0
03-06 43° 49° 206 84 11 0 0
03-07 27° 40° 218 86 11 0 0
03-08 35° 60° 243 101 16 0 0
03-09 43° 57° 271 119 24 0 0
03-10 31° 41° 284 123 24 0 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 26° 41° 296 124 24 0 0
03-12 22° 42° 306 124 24 0 0
03-13 27° 42° 318 126 24 0 0
03-14 22° 33° 323 126 24 0 0
03-15 22° 30° 327 126 24 0 0
03-16 5° 19° 327 126 24 0 0
03-17 -5° 18° 327 126 24 0 0
03-18 18° 45° 337 126 24 0 0
03-19 30° 55° 357 137 24 0 0
03-20 44° 63° 389 159 36 4 0
03-21 44° 79° 428 188 56 15 6
03-22 34° 48° 447 197 56 15 6
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 25° 46° 461 200 56 15 6
03-24 37° 54° 484 214 59 15 6
03-25 43° 73° 520 240 75 23 9
03-26 33° 57° 543 252 78 23 9
03-27 25° 36° 551 252 78 23 9
03-28 20° 59° 569 260 78 23 9
03-29 43° 69° 603 284 92 29 11
03-30 39° 73° 637 308 106 35 11
03-31 35° 52° 658 319 107 35 11
04-01 30° 44° 673 324 107 35 11
04-02 31° 38° 686 327 107 35 11
04-03 31° 38° 699 330 107 35 11
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 33° 38° 712 333 107 35 11
04-05 30° 47° 729 340 107 35 11
04-06 30° 39° 741 342 107 35 11
04-07 21° 45° 752 344 107 35 11
04-08 36° 64° 780 362 115 35 11
04-09 39° 53° 804 376 119 35 11
04-10 34° 49° 824 386 119 35 11
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 14° 21° 0 0 0 0 0
02-16 -2° 13° 0 0 0 0 0
02-17 -15° -2° 0 0 0 0 0
02-18 -15° 4° 0 0 0 0 0
02-19 -11° 8° 0 0 0 0 0
02-20 1° 21° 0 0 0 0 0
02-21 3° 28° 0 0 0 0 0
02-22 11° 37° 2 0 0 0 0
02-23 30° 49° 20 7 0 0 0
02-24 41° 53° 44 22 5 0 0
02-25 29° 51° 63 30 5 0 0
02-26 37° 55° 87 45 9 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 49° 106 54 9 0 0
02-28 25° 47° 120 58 9 0 0
03-01 12° 25° 120 58 9 0 0
03-02 13° 42° 126 58 9 0 0
03-03 29° 48° 142 65 9 0 0
03-04 32° 45° 159 71 9 0 0
03-05 25° 32° 165 71 9 0 0
03-06 15° 40° 171 71 9 0 0
03-07 26° 43° 183 74 9 0 0
03-08 29° 52° 202 82 9 0 0
03-09 32° 61° 226 97 13 0 0
03-10 36° 65° 254 115 22 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 28° 51° 272 123 22 0 0
03-12 32° 58° 295 135 24 0 0
03-13 31° 63° 320 151 30 0 0
03-14 51° 75° 361 182 51 14 8
03-15 27° 54° 380 190 51 14 8
03-16 18° 39° 386 190 51 14 8
03-17 31° 62° 411 205 56 14 8
03-18 34° 49° 430 214 56 14 8
03-19 33° 38° 443 218 56 14 8
03-20 26° 47° 458 222 56 14 8
03-21 31° 50° 476 231 56 14 8
03-22 17° 42° 484 231 56 14 8
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 30° 45° 499 236 56 14 8
03-24 24° 47° 512 239 56 14 8
03-25 28° 52° 530 247 56 14 8
03-26 30° 54° 550 257 56 14 8
03-27 40° 61° 579 276 64 14 8
03-28 43° 71° 614 301 79 21 10
03-29 33° 40° 628 305 79 21 10
03-30 31° 33° 638 305 79 21 10
03-31 25° 44° 651 307 79 21 10
04-01 30° 38° 663 310 79 21 10
04-02 32° 37° 675 312 79 21 10
04-03 33° 43° 691 318 79 21 10
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 28° 49° 708 324 79 21 10
04-05 31° 42° 722 329 79 21 10
04-06 28° 59° 744 340 81 21 10
04-07 25° 43° 756 343 81 21 10
04-08 22° 50° 770 347 81 21 10
04-09 37° 62° 798 365 88 21 10
04-10 42° 52° 823 379 93 21 10
04-11 39° 56° 848 395 99 21 10
04-12 39° 68° 880 417 111 25 10
04-13 54° 68° 919 446 130 36 16
04-14 42° 58° 947 464 138 36 16
04-15 37° 54° 970 477 141 36 16
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 33° 60° 995 492 145 36 16
04-17 49° 72° 1033 520 164 47 22
04-18 45° 58° 1063 540 174 48 22
04-19 33° 54° 1084 551 175 48 22
04-20 36° 55° 1108 565 178 48 22
04-21 39° 60° 1135 582 186 48 22
04-22 49° 70° 1173 610 203 58 26
04-23 48° 67° 1208 635 219 65 29
04-24 45° 51° 1234 651 225 65 29
04-25 42° 57° 1262 669 233 65 29
04-26 35° 63° 1289 686 240 65 29
04-27 50° 65° 1325 711 255 73 31
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 58° 71° 1367 744 277 87 40
04-29 42° 59° 1395 762 286 87 40
04-30 39° 69° 1427 784 298 91 40
05-01 52° 65° 1464 811 314 100 44
05-02 44° 52° 1490 827 320 100 44
05-03 42° 66° 1522 849 333 104 44
05-04 46° 80° 1563 880 353 117 52
05-05 54° 76° 1606 913 377 132 62
05-06 50° 82° 1650 947 401 148 73
05-07 54° 70° 1690 977 421 160 80
05-08 44° 71° 1725 1002 436 168 82
05-09 46° 85° 1769 1036 460 183 93
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 53° 74° 1811 1068 481 197 102
05-11 59° 90° 1863 1110 514 222 121
05-12 60° 86° 1915 1151 545 245 140
05-13 62° 86° 1967 1194 577 269 159
05-14 64° 85° 2019 1236 610 294 178
05-15 59° 78° 2066 1273 637 312 192
05-16 49° 61° 2100 1296 650 318 192
05-17 44° 51° 2125 1312 656 318 192
05-18 42° 56° 2153 1329 663 318 192
05-19 39° 59° 2179 1346 670 318 192
05-20 42° 48° 2203 1359 673 318 192
05-21 44° 49° 2227 1374 678 318 192
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 41° 65° 2258 1395 689 320 192
05-23 42° 63° 2289 1416 700 323 192
05-24 44° 66° 2322 1439 713 328 192
05-25 43° 70° 2356 1463 727 335 194
05-26 46° 71° 2393 1490 744 343 197
05-27 56° 64° 2431 1518 761 353 202
05-28 53° 60° 2466 1543 776 360 204
05-29 54° 71° 2506 1573 797 373 212
05-30 55° 78° 2551 1608 822 389 224
05-31 56° 78° 2597 1643 847 407 236
06-01 53° 80° 2641 1678 872 424 248
06-02 63° 90° 2696 1723 907 450 270
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 55° 70° 2736 1753 927 463 277
06-04 51° 77° 2778 1785 949 477 286
06-05 52° 78° 2822 1819 972 492 296
06-06 60° 71° 2865 1852 996 508 307
06-07 56° 76° 2909 1886 1020 524 318
06-08 58° 70° 2952 1918 1042 538 327
06-09 51° 66° 2988 1945 1059 546 331
06-10 58° 82° 3036 1983 1087 567 346
06-11 62° 71° 3081 2018 1112 583 357
06-12 57° 70° 3123 2050 1133 597 366
06-13 52° 59° 3156 2073 1147 602 367
06-14 53° 62° 3192 2098 1162 610 369
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 58° 74° 3235 2132 1186 626 380
06-16 65° 80° 3286 2173 1216 648 397
06-17 62° 79° 3334 2211 1245 669 413
06-18 61° 81° 3384 2251 1274 690 429
06-19 60° 87° 3435 2292 1306 714 448
06-20 69° 85° 3490 2337 1341 740 469
06-21 80° 96° 3556 2393 1387 778 503
06-22 82° 94° 3623 2449 1433 817 536
06-23 72° 88° 3680 2497 1471 847 561
06-24 61° 79° 3728 2535 1499 867 576
06-25 63° 71° 3774 2570 1524 884 588
06-26 61° 65° 3815 2602 1545 897 596
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 59° 71° 3858 2634 1568 912 606
06-28 62° 82° 3907 2674 1598 934 623
06-29 67° 81° 3959 2716 1630 958 642
06-30 63° 80° 4009 2755 1659 979 658
07-01 63° 85° 4061 2797 1691 1003 677
07-02 65° 89° 4116 2843 1726 1030 699
07-03 70° 91° 4174 2891 1765 1060 724
07-04 79° 92° 4238 2945 1808 1096 755
07-05 72° 83° 4293 2990 1844 1123 778
07-06 66° 83° 4346 3032 1876 1148 797
07-07 62° 85° 4397 3074 1907 1171 815
07-08 65° 83° 4449 3116 1939 1195 834
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 64° 85° 4501 3158 1972 1219 853
07-10 70° 80° 4554 3201 2005 1245 874
07-11 68° 84° 4608 3245 2039 1271 895
07-12 67° 78° 4659 3286 2070 1293 912
07-13 62° 87° 4711 3328 2102 1317 932
07-14 68° 91° 4769 3375 2139 1347 956
07-15 73° 93° 4829 3426 2180 1380 984
07-16 56° 71° 4871 3458 2202 1393 993
07-17 51° 71° 4910 3487 2221 1405 999
07-18 57° 73° 4953 3520 2244 1420 1009
07-19 65° 76° 5002 3559 2273 1441 1025
07-20 58° 80° 5049 3596 2300 1459 1039
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 63° 80° 5099 3635 2329 1481 1055
07-22 73° 88° 5158 3684 2368 1512 1081
07-23 71° 81° 5211 3728 2402 1538 1102
07-24 69° 83° 5265 3772 2436 1564 1123
07-25 64° 85° 5318 3815 2469 1588 1142
07-26 69° 89° 5375 3862 2506 1617 1166
07-27 71° 90° 5434 3910 2544 1648 1192
07-28 66° 87° 5488 3955 2579 1674 1213
07-29 66° 84° 5541 3998 2612 1699 1234
07-30 69° 79° 5593 4040 2644 1724 1253
07-31 57° 77° 5638 4075 2669 1741 1265
08-01 61° 78° 5686 4112 2696 1760 1279
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 57° 78° 5731 4148 2722 1778 1292
08-03 61° 77° 5778 4185 2749 1797 1306
08-04 66° 77° 5828 4224 2778 1818 1322
08-05 62° 81° 5877 4264 2808 1839 1339
08-06 68° 81° 5930 4307 2840 1864 1358
08-07 67° 86° 5984 4351 2875 1891 1380
08-08 72° 87° 6042 4399 2912 1920 1404
08-09 70° 83° 6096 4443 2947 1946 1425
08-10 67° 82° 6149 4485 2979 1971 1445
08-11 61° 78° 6196 4523 3007 1991 1460
08-12 68° 80° 6248 4565 3039 2014 1479
08-13 61° 80° 6296 4603 3067 2035 1494
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 66° 75° 6345 4642 3096 2055 1510
08-15 69° 83° 6399 4686 3130 2082 1531
08-16 69° 82° 6453 4729 3163 2107 1551
08-17 69° 78° 6504 4771 3195 2130 1570
08-18 68° 78° 6555 4812 3226 2154 1588
08-19 69° 85° 6610 4857 3261 2181 1610
08-20 66° 81° 6662 4899 3292 2204 1628
08-21 65° 83° 6714 4940 3324 2228 1647
08-22 69° 78° 6765 4982 3355 2251 1665
08-23 58° 70° 6807 5014 3378 2265 1675
08-24 56° 66° 6846 5043 3397 2276 1681
08-25 50° 69° 6884 5070 3414 2286 1685
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 54° 74° 6926 5103 3437 2300 1694
08-27 55° 79° 6971 5138 3461 2317 1706
08-28 59° 79° 7018 5175 3488 2336 1720
08-29 61° 78° 7065 5212 3516 2355 1735
08-30 59° 77° 7111 5248 3542 2373 1747
08-31 53° 78° 7155 5281 3565 2389 1758
09-01 60° 78° 7202 5318 3592 2408 1772
09-02 60° 74° 7246 5353 3617 2425 1784
09-03 51° 66° 7283 5380 3633 2433 1787
09-04 44° 59° 7312 5399 3643 2435 1787
09-05 45° 58° 7342 5419 3652 2436 1787
09-06 45° 58° 7371 5438 3661 2437 1787
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 42° 64° 7402 5459 3673 2440 1787
09-08 47° 78° 7443 5490 3693 2453 1795
09-09 63° 69° 7487 5524 3717 2469 1806
09-10 61° 73° 7532 5559 3743 2486 1818
09-11 56° 76° 7576 5593 3766 2502 1829
09-12 61° 81° 7625 5632 3796 2523 1845
09-13 65° 82° 7676 5673 3827 2547 1864
09-14 68° 86° 7731 5718 3862 2573 1885
09-15 72° 82° 7786 5763 3897 2601 1908
09-16 69° 91° 7844 5811 3935 2630 1932
09-17 66° 81° 7896 5852 3966 2654 1951
09-18 65° 81° 7947 5893 3997 2677 1969
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 65° 72° 7993 5930 4024 2695 1982
09-20 62° 71° 8037 5964 4048 2712 1994
09-21 64° 76° 8086 6002 4076 2732 2009
09-22 59° 74° 8130 6037 4101 2748 2020
09-23 58° 74° 8174 6071 4124 2764 2031
09-24 55° 74° 8217 6103 4147 2779 2041
09-25 54° 82° 8263 6140 4173 2797 2054
09-26 56° 78° 8308 6175 4199 2814 2066
09-27 54° 73° 8350 6207 4221 2828 2075
09-28 47° 79° 8391 6238 4242 2841 2083
09-29 53° 87° 8439 6276 4270 2862 2099
09-30 65° 83° 8491 6318 4302 2886 2118
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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