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.

Welcome!

It appears to be your first time visiting GDDTracker
Please enter your zip code for a customized experience. Also, be sure and watch our video introduction video.

   
       

Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Mon, Feb. 17. 2025

 

GDD Total: 0 (Base 32) through Mon, Feb. 17, 2025

  

Minneapolis, MN

       

Forecast »

Done

801

Late

500

Optimum

250

Early

171

Under

0

 

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 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 -19° 0 0 0 0 0
02-19 -13° 0 0 0 0 0
02-20 -6° 12° 0 0 0 0 0
02-21 -3° 19° 0 0 0 0 0
02-22 11° 30° 0 0 0 0 0
02-23 22° 39° 9 0 0 0 0
02-24 29° 42° 23 4 0 0 0
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 16° 28° 0 0 0 0 0
02-16 10° 19° 0 0 0 0 0
02-17 28° 0 0 0 0 0
02-18 22° 35° 7 0 0 0 0
02-19 20° 39° 14 0 0 0 0
02-20 29° 44° 29 5 0 0 0
02-21 23° 48° 42 8 0 0 0
02-22 28° 50° 60 15 0 0 0
02-23 22° 35° 66 15 0 0 0
02-24 17° 45° 75 15 0 0 0
02-25 32° 48° 93 23 0 0 0
02-26 29° 63° 117 37 4 0 0
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 14° 49° 127 37 4 0 0
02-28 19° 127 37 4 0 0
02-29 12° 51° 136 37 4 0 0
03-01 36° 58° 161 52 9 0 0
03-02 33° 62° 186 68 14 0 0
03-03 41° 68° 219 90 27 5 0
03-04 29° 40° 232 93 27 5 0
03-05 23° 47° 245 96 27 5 0
03-06 26° 54° 263 104 27 5 0
03-07 33° 47° 281 112 27 5 0
03-08 24° 38° 290 112 27 5 0
03-09 22° 40° 299 112 27 5 0
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 18° 50° 312 114 27 5 0
03-11 33° 66° 339 132 34 5 0
03-12 42° 66° 372 154 47 9 0
03-13 38° 62° 400 172 55 9 0
03-14 43° 58° 428 191 63 10 0
03-15 31° 50° 447 199 63 10 0
03-16 34° 50° 466 209 63 10 0
03-17 25° 32° 473 209 63 10 0
03-18 21° 37° 480 209 63 10 0
03-19 34° 50° 500 219 63 10 0
03-20 17° 31° 502 219 63 10 0
03-21 22° 32° 507 219 63 10 0
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 24° 32° 513 219 63 10 0
03-23 15° 34° 516 219 63 10 0
03-24 27° 32° 523 219 63 10 0
03-25 32° 36° 535 221 63 10 0
03-26 21° 34° 541 221 63 10 0
03-27 17° 28° 542 221 63 10 0
03-28 19° 36° 547 221 63 10 0
03-29 22° 44° 558 222 63 10 0
03-30 34° 44° 575 229 63 10 0
03-31 33° 45° 591 235 63 10 0
04-01 32° 44° 607 241 63 10 0
04-02 33° 41° 622 246 63 10 0
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 34° 50° 643 257 63 10 0
04-04 33° 52° 663 267 64 10 0
04-05 30° 57° 685 279 66 10 0
04-06 34° 59° 710 293 70 10 0
04-07 39° 49° 732 306 73 10 0
04-08 42° 49° 755 319 76 10 0
04-09 40° 61° 784 338 85 10 0
04-10 42° 69° 818 362 98 16 1
04-11 44° 60° 848 382 108 18 1
04-12 43° 60° 877 401 118 19 1
04-13 38° 84° 916 430 137 30 7
04-14 46° 71° 953 457 154 39 10
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 47° 60° 984 478 165 43 10
04-16 47° 56° 1014 498 175 44 10
04-17 44° 53° 1040 514 181 44 10
04-18 45° 50° 1066 530 187 44 10
04-19 33° 39° 1080 534 187 44 10
04-20 31° 47° 1097 541 187 44 10
04-21 32° 53° 1118 551 187 44 10
04-22 40° 68° 1150 574 199 48 10
04-23 44° 60° 1179 593 209 50 10
04-24 33° 59° 1203 607 213 50 10
04-25 44° 68° 1237 631 227 56 11
04-26 46° 56° 1266 650 236 57 11
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 49° 57° 1297 671 247 60 11
04-28 44° 52° 1323 687 252 60 11
04-29 43° 49° 1347 701 257 60 11
04-30 41° 69° 1380 724 270 65 11
05-01 49° 64° 1415 749 284 71 13
05-02 48° 56° 1445 769 295 74 13
05-03 45° 69° 1480 794 310 81 15
05-04 46° 61° 1512 816 321 84 15
05-05 41° 69° 1545 839 334 90 15
05-06 48° 73° 1584 868 353 100 21
05-07 57° 71° 1625 899 375 114 30
05-08 47° 75° 1664 928 394 125 35
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 48° 65° 1699 953 408 132 37
05-10 42° 73° 1735 979 424 139 40
05-11 45° 75° 1773 1007 443 150 45
05-12 59° 85° 1823 1047 473 172 62
05-13 51° 70° 1862 1076 491 182 68
05-14 48° 71° 1899 1103 509 192 72
05-15 48° 73° 1937 1131 527 202 78
05-16 56° 70° 1979 1162 548 215 86
05-17 54° 84° 2026 1200 575 234 100
05-18 64° 80° 2076 1240 605 257 117
05-19 50° 71° 2114 1268 624 267 123
05-20 57° 76° 2159 1303 648 284 134
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 62° 72° 2204 1338 673 301 146
05-22 53° 69° 2243 1367 693 312 152
05-23 55° 78° 2287 1401 717 328 163
05-24 51° 71° 2327 1431 736 339 170
05-25 47° 74° 2365 1459 755 350 175
05-26 58° 69° 2406 1490 776 363 183
05-27 50° 65° 2442 1515 791 370 186
05-28 53° 64° 2478 1542 808 379 189
05-29 47° 70° 2515 1569 824 387 193
05-30 55° 77° 2559 1603 849 404 204
05-31 62° 69° 2602 1636 872 419 214
06-01 60° 75° 2648 1672 898 437 227
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 56° 76° 2692 1706 922 453 239
06-03 63° 81° 2743 1747 952 475 256
06-04 62° 85° 2794 1788 984 499 274
06-05 56° 79° 2839 1823 1009 516 286
06-06 60° 70° 2883 1857 1032 531 297
06-07 57° 77° 2928 1892 1057 548 309
06-08 58° 76° 2973 1926 1082 565 321
06-09 57° 71° 3015 1959 1104 579 330
06-10 51° 75° 3055 1989 1125 592 337
06-11 56° 82° 3103 2027 1152 611 352
06-12 59° 80° 3150 2064 1180 631 366
06-13 63° 84° 3202 2106 1211 655 385
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-14 59° 80° 3249 2143 1239 674 399
06-15 62° 71° 3294 2178 1263 690 411
06-16 63° 86° 3346 2220 1296 715 430
06-17 56° 77° 3391 2255 1320 731 442
06-18 64° 84° 3443 2297 1352 755 461
06-19 62° 73° 3488 2332 1377 773 473
06-20 58° 66° 3528 2362 1398 785 480
06-21 64° 71° 3574 2398 1423 802 493
06-22 63° 73° 3619 2433 1449 820 505
06-23 54° 83° 3665 2469 1475 838 519
06-24 63° 83° 3716 2510 1506 861 536
06-25 72° 85° 3773 2557 1542 889 560
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-26 65° 79° 3823 2596 1572 911 577
06-27 57° 74° 3867 2630 1596 927 588
06-28 64° 77° 3915 2669 1625 948 603
06-29 61° 70° 3959 2703 1648 964 614
06-30 51° 73° 3999 2733 1669 976 621
07-01 58° 76° 4044 2768 1693 992 633
07-02 60° 73° 4088 2802 1718 1009 644
07-03 64° 85° 4141 2845 1750 1033 664
07-04 63° 69° 4185 2879 1774 1050 675
07-05 62° 76° 4232 2916 1801 1069 689
07-06 59° 81° 4280 2954 1829 1089 704
07-07 62° 80° 4329 2993 1859 1110 720
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-08 65° 79° 4380 3033 1889 1132 738
07-09 63° 83° 4431 3075 1921 1156 756
07-10 66° 80° 4482 3116 1951 1179 774
07-11 63° 85° 4534 3157 1983 1202 793
07-12 68° 87° 4589 3203 2019 1230 815
07-13 70° 81° 4643 3247 2052 1256 836
07-14 67° 88° 4698 3292 2088 1283 858
07-15 69° 84° 4752 3336 2122 1309 880
07-16 63° 80° 4802 3376 2152 1331 896
07-17 59° 75° 4847 3411 2177 1348 908
07-18 58° 79° 4893 3447 2203 1366 921
07-19 61° 80° 4942 3486 2232 1387 937
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-20 68° 82° 4995 3529 2264 1412 957
07-21 68° 79° 5046 3570 2296 1435 975
07-22 66° 84° 5100 3613 2329 1460 996
07-23 64° 74° 5147 3651 2356 1479 1010
07-24 61° 76° 5193 3687 2383 1498 1023
07-25 58° 82° 5241 3725 2411 1518 1038
07-26 67° 85° 5295 3769 2445 1544 1059
07-27 72° 91° 5355 3819 2484 1576 1086
07-28 72° 90° 5414 3868 2524 1607 1112
07-29 70° 87° 5470 3914 2560 1635 1135
07-30 71° 88° 5528 3962 2597 1665 1160
07-31 71° 90° 5587 4011 2636 1695 1186
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-01 66° 75° 5636 4049 2665 1716 1202
08-02 65° 91° 5692 4096 2701 1744 1225
08-03 61° 85° 5743 4137 2733 1768 1243
08-04 68° 82° 5796 4180 2766 1793 1263
08-05 59° 73° 5840 4214 2790 1809 1274
08-06 56° 76° 5884 4248 2813 1825 1285
08-07 57° 75° 5928 4282 2838 1841 1296
08-08 60° 69° 5971 4314 2860 1855 1306
08-09 56° 69° 6011 4345 2880 1868 1313
08-10 53° 73° 6052 4376 2901 1881 1321
08-11 53° 78° 6095 4409 2925 1896 1331
08-12 54° 81° 6141 4444 2950 1913 1344
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-13 58° 82° 6188 4482 2978 1933 1359
08-14 63° 80° 6238 4522 3008 1955 1375
08-15 65° 78° 6288 4561 3037 1976 1392
08-16 65° 77° 6337 4601 3066 1997 1408
08-17 67° 76° 6386 4640 3096 2019 1425
08-18 62° 82° 6436 4680 3126 2041 1441
08-19 59° 81° 6484 4718 3154 2061 1456
08-20 61° 75° 6530 4754 3180 2079 1469
08-21 60° 78° 6577 4791 3207 2098 1483
08-22 61° 71° 6621 4825 3231 2114 1494
08-23 64° 79° 6671 4865 3260 2136 1511
08-24 64° 86° 6724 4908 3293 2161 1531
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-25 73° 84° 6781 4955 3330 2189 1555
08-26 70° 93° 6840 5004 3370 2221 1581
08-27 68° 76° 6891 5044 3400 2243 1599
08-28 62° 72° 6936 5080 3425 2260 1611
08-29 65° 87° 6990 5124 3460 2287 1632
08-30 60° 79° 7037 5161 3487 2306 1646
08-31 59° 84° 7087 5201 3516 2328 1663
09-01 56° 72° 7129 5233 3539 2342 1672
09-02 52° 75° 7171 5265 3560 2355 1681
09-03 58° 78° 7217 5301 3586 2373 1694
09-04 59° 82° 7265 5339 3615 2394 1709
09-05 63° 74° 7312 5376 3641 2413 1723
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-06 52° 67° 7350 5403 3659 2422 1728
09-07 46° 69° 7385 5429 3675 2430 1730
09-08 53° 78° 7429 5463 3698 2446 1741
09-09 56° 82° 7476 5500 3726 2465 1755
09-10 63° 81° 7526 5540 3755 2486 1772
09-11 62° 84° 7577 5581 3786 2510 1790
09-12 60° 85° 7627 5621 3817 2532 1808
09-13 62° 83° 7678 5662 3848 2555 1825
09-14 68° 75° 7728 5701 3877 2576 1842
09-15 67° 87° 7783 5746 3912 2603 1864
09-16 68° 87° 7838 5792 3948 2631 1886
09-17 70° 87° 7895 5839 3984 2660 1910
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-18 69° 84° 7949 5883 4019 2686 1931
09-19 69° 85° 8004 5928 4053 2713 1953
09-20 60° 81° 8053 5967 4082 2733 1969
09-21 63° 81° 8102 6006 4112 2755 1985
09-22 52° 69° 8141 6035 4130 2766 1991
09-23 44° 70° 8176 6060 4145 2773 1993
09-24 54° 73° 8217 6091 4167 2786 2002
09-25 52° 79° 8261 6125 4191 2802 2012
09-26 55° 83° 8308 6162 4217 2821 2026
09-27 55° 84° 8355 6199 4245 2840 2040
09-28 57° 85° 8404 6238 4274 2861 2056
09-29 54° 83° 8451 6275 4300 2879 2070
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-30 60° 84° 8501 6315 4330 2902 2087

 

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.