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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Black Turfgrass Ataenius Egg Laying (GDD 50)
through Fri, Dec. 12. 2025

 
  

Moorhead, MN

        

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 -4° 7° 0 0 0 0 0
02-16 -11° 3° 0 0 0 0 0
02-17 -22° -4° 0 0 0 0 0
02-18 -20° -2° 0 0 0 0 0
02-19 -17° 4° 0 0 0 0 0
02-20 -11° 10° 0 0 0 0 0
02-21 -1° 19° 0 0 0 0 0
02-22 10° 33° 0 0 0 0 0
02-23 19° 39° 7 0 0 0 0
02-24 33° 45° 24 7 0 0 0
02-25 25° 45° 37 10 0 0 0
02-26 30° 44° 53 16 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 44° 69 22 0 0 0
02-28 13° 42° 74 22 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 4° 22° 74 22 0 0 0
03-02 17° 44° 83 22 0 0 0
03-03 25° 53° 100 29 0 0 0
03-04 22° 35° 107 29 0 0 0
03-05 18° 35° 112 29 0 0 0
03-06 20° 35° 117 29 0 0 0
03-07 16° 36° 122 29 0 0 0
03-08 25° 54° 139 36 0 0 0
03-09 29° 58° 161 48 2 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 23° 65° 183 60 4 0 0
03-11 8° 32° 183 60 4 0 0
03-12 25° 49° 198 65 4 0 0
03-13 34° 62° 224 81 10 0 0
03-14 34° 68° 253 100 18 1 0
03-15 19° 31° 256 100 18 1 0
03-16 13° 30° 256 100 18 1 0
03-17 29° 44° 270 104 18 1 0
03-18 30° 41° 283 108 18 1 0
03-19 24° 41° 294 108 18 1 0
03-20 19° 57° 310 114 18 1 0
03-21 15° 46° 318 114 18 1 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 10° 43° 323 114 18 1 0
03-23 21° 38° 330 114 18 1 0
03-24 13° 44° 337 114 18 1 0
03-25 26° 46° 351 118 18 1 0
03-26 26° 46° 365 122 18 1 0
03-27 25° 57° 384 131 18 1 0
03-28 33° 48° 402 139 18 1 0
03-29 31° 37° 414 141 18 1 0
03-30 29° 46° 430 147 18 1 0
03-31 19° 42° 438 147 18 1 0
04-01 27° 36° 448 147 18 1 0
04-02 31° 33° 458 147 18 1 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 31° 40° 471 150 18 1 0
04-04 27° 34° 480 150 18 1 0
04-05 19° 40° 487 150 18 1 0
04-06 26° 49° 503 156 18 1 0
04-07 20° 36° 509 156 18 1 0
04-08 24° 47° 523 160 18 1 0
04-09 35° 65° 551 178 27 1 0
04-10 36° 50° 572 189 28 1 0
04-11 30° 62° 596 203 32 1 0
04-12 47° 67° 631 228 47 8 2
04-13 43° 64° 663 250 59 12 2
04-14 37° 47° 683 260 59 12 2
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 27° 53° 701 268 59 12 2
04-16 36° 63° 729 286 66 12 2
04-17 42° 54° 755 302 72 12 2
04-18 32° 45° 772 309 72 12 2
04-19 23° 54° 788 315 72 12 2
04-20 39° 62° 817 334 81 13 2
04-21 36° 66° 846 353 91 14 2
04-22 47° 63° 880 377 104 19 2
04-23 35° 54° 902 389 106 19 2
04-24 31° 59° 925 402 109 19 2
04-25 37° 64° 953 420 118 20 2
04-26 38° 63° 982 439 126 20 2
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 49° 60° 1014 461 139 25 2
04-28 35° 56° 1038 475 142 25 2
04-29 28° 50° 1055 482 142 25 2
04-30 40° 70° 1088 505 156 30 2
05-01 47° 54° 1116 523 164 30 2
05-02 38° 57° 1142 539 169 30 2
05-03 37° 75° 1176 563 183 36 3
05-04 45° 82° 1217 594 204 49 12
05-05 52° 84° 1263 630 230 67 24
05-06 47° 72° 1300 657 248 77 29
05-07 41° 72° 1335 682 262 83 31
05-08 47° 77° 1375 712 282 95 38
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 57° 79° 1421 748 308 113 51
05-10 47° 83° 1464 781 331 128 61
05-11 63° 94° 1521 828 368 157 84
05-12 69° 93° 1580 877 407 188 111
05-13 66° 93° 1637 924 445 218 135
05-14 65° 90° 1693 970 480 245 157
05-15 51° 77° 1735 1002 502 259 166
05-16 40° 52° 1759 1016 506 259 166
05-17 37° 43° 1776 1023 506 259 166
05-18 40° 56° 1802 1039 512 259 166
05-19 41° 54° 1828 1055 517 259 166
05-20 40° 46° 1848 1065 518 259 166
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 40° 50° 1871 1078 521 259 166
05-22 41° 66° 1903 1100 532 262 166
05-23 42° 67° 1935 1122 545 267 166
05-24 45° 69° 1970 1147 560 274 168
05-25 43° 73° 2006 1173 576 282 171
05-26 48° 75° 2046 1203 595 293 177
05-27 53° 71° 2086 1233 616 306 185
05-28 50° 70° 2124 1261 634 316 190
05-29 53° 77° 2167 1294 657 331 200
05-30 53° 81° 2212 1329 682 348 212
05-31 52° 85° 2259 1366 708 367 226
06-01 56° 87° 2308 1405 738 388 242
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 57° 77° 2353 1440 763 405 254
06-03 48° 74° 2393 1470 782 416 260
06-04 47° 75° 2431 1498 801 427 266
06-05 51° 75° 2473 1530 822 440 275
06-06 54° 72° 2514 1561 844 454 283
06-07 56° 81° 2560 1597 870 472 296
06-08 51° 60° 2594 1621 884 478 297
06-09 51° 61° 2628 1645 898 484 298
06-10 45° 86° 2672 1679 921 499 308
06-11 52° 77° 2714 1711 944 514 318
06-12 60° 70° 2757 1744 967 529 328
06-13 57° 63° 2795 1772 985 539 333
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 55° 71° 2836 1803 1006 552 341
06-15 54° 68° 2875 1832 1025 563 347
06-16 62° 74° 2921 1868 1051 581 360
06-17 56° 82° 2968 1905 1077 600 374
06-18 58° 83° 3016 1943 1106 620 389
06-19 59° 84° 3065 1982 1135 641 405
06-20 65° 85° 3118 2025 1168 666 425
06-21 63° 86° 3171 2068 1201 691 445
06-22 66° 91° 3227 2114 1237 719 468
06-23 61° 71° 3271 2148 1261 735 479
06-24 51° 78° 3313 2180 1283 749 488
06-25 61° 68° 3356 2213 1306 764 498
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 57° 64° 3395 2242 1324 775 504
06-27 60° 73° 3439 2276 1349 791 515
06-28 64° 87° 3493 2320 1383 817 536
06-29 64° 83° 3545 2362 1414 841 555
06-30 59° 80° 3592 2399 1442 860 569
07-01 61° 85° 3644 2441 1473 883 587
07-02 64° 88° 3698 2485 1507 909 609
07-03 67° 87° 3753 2530 1542 936 631
07-04 72° 93° 3813 2580 1583 969 658
07-05 67° 80° 3865 2622 1614 992 677
07-06 55° 78° 3909 2656 1639 1009 688
07-07 63° 76° 3956 2693 1666 1028 702
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 58° 76° 4001 2728 1691 1045 714
07-09 57° 83° 4050 2767 1719 1065 729
07-10 70° 85° 4105 2812 1754 1093 752
07-11 66° 76° 4154 2851 1783 1113 767
07-12 57° 78° 4199 2886 1808 1130 779
07-13 61° 87° 4251 2928 1840 1154 798
07-14 61° 86° 4303 2970 1872 1178 817
07-15 62° 77° 4350 3007 1900 1198 832
07-16 56° 67° 4390 3037 1919 1209 838
07-17 46° 73° 4427 3064 1936 1219 843
07-18 62° 74° 4473 3100 1963 1237 856
07-19 59° 77° 4520 3137 1989 1255 869
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 58° 78° 4566 3173 2015 1273 882
07-21 65° 83° 4618 3215 2047 1297 901
07-22 71° 81° 4671 3258 2081 1323 922
07-23 67° 75° 4720 3297 2109 1344 938
07-24 58° 79° 4767 3334 2136 1362 951
07-25 64° 84° 4819 3376 2168 1386 970
07-26 70° 87° 4875 3422 2204 1414 994
07-27 69° 89° 4932 3469 2241 1443 1018
07-28 63° 82° 4982 3509 2272 1466 1035
07-29 63° 80° 5032 3549 2301 1487 1051
07-30 60° 75° 5077 3584 2327 1505 1064
07-31 50° 76° 5118 3615 2347 1517 1072
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 54° 79° 5162 3649 2372 1534 1083
08-02 57° 75° 5206 3683 2396 1550 1094
08-03 63° 69° 5250 3717 2420 1566 1105
08-04 64° 74° 5297 3754 2447 1585 1119
08-05 65° 76° 5346 3793 2476 1606 1135
08-06 62° 83° 5397 3834 2506 1628 1153
08-07 68° 87° 5452 3879 2542 1656 1175
08-08 66° 79° 5503 3920 2572 1678 1193
08-09 61° 82° 5552 3959 2602 1700 1209
08-10 61° 74° 5598 3995 2627 1718 1222
08-11 60° 82° 5647 4034 2657 1739 1238
08-12 59° 78° 5693 4070 2683 1757 1251
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 54° 79° 5738 4105 2707 1773 1263
08-14 67° 85° 5792 4149 2741 1799 1284
08-15 66° 79° 5842 4189 2772 1822 1301
08-16 64° 80° 5893 4230 2802 1844 1318
08-17 64° 75° 5940 4267 2830 1864 1333
08-18 67° 83° 5993 4310 2863 1889 1353
08-19 63° 78° 6041 4348 2891 1909 1368
08-20 57° 83° 6090 4387 2919 1929 1383
08-21 67° 83° 6143 4430 2953 1955 1404
08-22 64° 83° 6194 4471 2984 1978 1422
08-23 54° 69° 6234 4501 3003 1989 1428
08-24 51° 67° 6271 4528 3020 1998 1432
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 42° 71° 6305 4552 3035 2005 1434
08-26 50° 77° 6346 4583 3056 2018 1442
08-27 53° 81° 6392 4619 3081 2035 1455
08-28 57° 83° 6440 4657 3110 2056 1470
08-29 63° 82° 6491 4698 3140 2078 1487
08-30 61° 81° 6540 4737 3169 2099 1503
08-31 58° 78° 6586 4773 3196 2118 1517
09-01 54° 78° 6630 4807 3219 2133 1528
09-02 56° 75° 6673 4840 3243 2149 1538
09-03 45° 59° 6703 4860 3252 2151 1538
09-04 40° 57° 6729 4876 3259 2151 1538
09-05 43° 59° 6758 4895 3268 2152 1538
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 42° 61° 6788 4915 3277 2153 1538
09-07 34° 66° 6816 4933 3285 2153 1538
09-08 50° 74° 6856 4963 3305 2165 1545
09-09 54° 79° 6900 4997 3330 2182 1557
09-10 50° 78° 6942 5029 3352 2196 1566
09-11 56° 80° 6988 5065 3378 2214 1579
09-12 65° 76° 7037 5104 3407 2234 1594
09-13 60° 78° 7084 5141 3434 2253 1608
09-14 64° 89° 7139 5186 3469 2280 1630
09-15 68° 85° 7194 5231 3503 2307 1652
09-16 60° 85° 7244 5271 3534 2330 1670
09-17 56° 76° 7288 5305 3558 2345 1680
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 60° 69° 7331 5338 3580 2360 1690
09-19 61° 65° 7372 5369 3602 2373 1698
09-20 60° 69° 7414 5401 3624 2388 1708
09-21 59° 73° 7458 5435 3648 2404 1719
09-22 54° 79° 7503 5470 3673 2420 1730
09-23 55° 83° 7550 5507 3700 2439 1744
09-24 56° 78° 7595 5542 3725 2456 1756
09-25 55° 74° 7638 5575 3747 2471 1766
09-26 45° 83° 7680 5607 3769 2485 1775
09-27 46° 76° 7719 5636 3788 2496 1781
09-28 54° 84° 7766 5673 3815 2515 1795
09-29 60° 90° 7819 5716 3849 2540 1815
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 65° 84° 7871 5758 3881 2564 1834
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 13° 21° 0 0 0 0 0
02-16 6° 18° 0 0 0 0 0
02-17 15° 41° 6 0 0 0 0
02-18 18° 36° 11 0 0 0 0
02-19 20° 46° 22 1 0 0 0
02-20 21° 40° 31 1 0 0 0
02-21 27° 49° 47 7 0 0 0
02-22 27° 48° 62 13 0 0 0
02-23 21° 33° 67 13 0 0 0
02-24 18° 54° 81 17 0 0 0
02-25 28° 38° 92 18 0 0 0
02-26 33° 60° 116 32 4 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 -1° 32° 116 32 4 0 0
02-28 -8° 11° 116 32 4 0 0
02-29 6° 41° 117 32 4 0 0
03-01 32° 54° 139 43 5 0 0
03-02 29° 44° 153 48 5 0 0
03-03 28° 50° 171 55 5 0 0
03-04 17° 28° 171 55 5 0 0
03-05 15° 30° 171 55 5 0 0
03-06 22° 52° 186 60 5 0 0
03-07 13° 30° 186 60 5 0 0
03-08 20° 30° 189 60 5 0 0
03-09 17° 39° 196 60 5 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 23° 57° 214 67 5 0 0
03-11 27° 66° 238 82 10 0 0
03-12 26° 58° 258 91 10 0 0
03-13 38° 54° 281 105 14 0 0
03-14 31° 49° 300 114 14 0 0
03-15 34° 54° 322 126 16 0 0
03-16 25° 47° 335 129 16 0 0
03-17 18° 25° 335 129 16 0 0
03-18 12° 43° 341 129 16 0 0
03-19 20° 38° 348 129 16 0 0
03-20 12° 25° 348 129 16 0 0
03-21 17° 31° 350 129 16 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 12° 30° 350 129 16 0 0
03-23 11° 32° 350 129 16 0 0
03-24 22° 28° 353 129 16 0 0
03-25 22° 28° 356 129 16 0 0
03-26 16° 25° 356 129 16 0 0
03-27 11° 31° 356 129 16 0 0
03-28 12° 38° 359 129 16 0 0
03-29 27° 41° 371 132 16 0 0
03-30 33° 39° 385 136 16 0 0
03-31 30° 43° 400 140 16 0 0
04-01 25° 48° 415 145 16 0 0
04-02 28° 48° 431 151 16 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 30° 53° 450 161 16 0 0
04-04 22° 56° 468 168 16 0 0
04-05 27° 62° 490 181 18 0 0
04-06 38° 63° 519 199 27 1 0
04-07 39° 49° 541 212 29 1 0
04-08 38° 45° 561 222 29 1 0
04-09 35° 61° 587 238 35 1 0
04-10 39° 66° 618 259 46 4 0
04-11 39° 57° 644 275 52 4 0
04-12 32° 60° 668 289 56 4 0
04-13 44° 77° 707 317 75 14 6
04-14 41° 72° 741 341 89 20 7
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 47° 57° 771 362 99 22 7
04-16 49° 57° 802 382 110 25 7
04-17 40° 52° 826 397 114 25 7
04-18 34° 41° 842 402 114 25 7
04-19 28° 36° 852 402 114 25 7
04-20 28° 51° 870 410 114 25 7
04-21 27° 54° 888 419 114 25 7
04-22 45° 69° 924 444 129 33 9
04-23 45° 60° 954 464 140 35 9
04-24 29° 66° 979 480 145 35 9
04-25 48° 76° 1019 510 165 47 16
04-26 47° 62° 1052 532 178 52 16
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 45° 49° 1077 547 183 52 16
04-28 40° 45° 1097 558 183 52 16
04-29 37° 46° 1117 567 183 52 16
04-30 37° 55° 1141 581 187 52 16
05-01 45° 64° 1173 604 200 56 16
05-02 46° 55° 1202 622 208 57 16
05-03 41° 58° 1229 639 215 57 16
05-04 40° 61° 1257 658 224 57 16
05-05 38° 69° 1289 679 235 61 16
05-06 53° 73° 1330 711 257 74 25
05-07 55° 66° 1369 739 275 85 30
05-08 45° 74° 1406 767 292 94 35
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 49° 72° 1445 795 311 104 40
05-10 49° 71° 1482 823 329 114 45
05-11 41° 82° 1522 853 348 126 52
05-12 54° 74° 1564 885 371 140 61
05-13 42° 68° 1597 908 384 145 61
05-14 47° 73° 1635 936 402 155 66
05-15 53° 63° 1671 961 417 163 69
05-16 51° 69° 1709 990 436 173 74
05-17 57° 86° 1759 1029 465 194 90
05-18 58° 67° 1799 1060 486 207 98
05-19 47° 65° 1833 1084 500 213 99
05-20 50° 68° 1871 1111 517 222 103
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 52° 60° 1904 1135 531 228 104
05-22 48° 68° 1940 1161 546 236 107
05-23 50° 70° 1978 1188 564 246 111
05-24 42° 60° 2007 1207 573 247 111
05-25 40° 65° 2038 1228 584 249 111
05-26 49° 72° 2076 1256 602 259 117
05-27 55° 65° 2114 1284 620 269 121
05-28 51° 60° 2147 1307 633 275 122
05-29 43° 74° 2184 1334 650 283 126
05-30 61° 71° 2228 1368 674 300 137
05-31 49° 72° 2267 1397 693 311 143
06-01 51° 76° 2309 1429 715 324 152
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 56° 72° 2351 1461 737 339 161
06-03 56° 75° 2394 1495 761 354 171
06-04 59° 74° 2439 1529 785 370 183
06-05 55° 75° 2482 1562 808 386 193
06-06 56° 73° 2525 1595 831 400 203
06-07 51° 78° 2567 1627 853 414 212
06-08 53° 77° 2610 1660 876 429 222
06-09 51° 72° 2649 1689 895 441 228
06-10 49° 74° 2689 1719 915 452 235
06-11 60° 81° 2737 1757 943 473 250
06-12 64° 94° 2794 1804 980 501 274
06-13 59° 81° 2842 1842 1008 522 289
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 55° 82° 2889 1879 1035 540 302
06-15 67° 82° 2941 1921 1067 565 322
06-16 64° 79° 2991 1961 1097 586 339
06-17 58° 76° 3036 1996 1122 604 351
06-18 57° 68° 3077 2027 1143 616 358
06-19 53° 70° 3116 2056 1162 628 365
06-20 58° 72° 3159 2089 1185 643 375
06-21 60° 75° 3205 2125 1211 660 388
06-22 64° 75° 3253 2163 1239 680 402
06-23 59° 80° 3300 2200 1266 700 417
06-24 65° 85° 3353 2244 1300 725 437
06-25 61° 84° 3404 2285 1330 748 455
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 61° 69° 3447 2317 1353 763 465
06-27 52° 71° 3487 2347 1373 774 472
06-28 64° 78° 3536 2386 1402 795 488
06-29 55° 67° 3574 2415 1421 806 493
06-30 48° 73° 3613 2443 1439 816 499
07-01 62° 76° 3660 2480 1466 836 513
07-02 60° 79° 3707 2517 1493 855 527
07-03 62° 81° 3756 2557 1523 876 543
07-04 61° 71° 3800 2591 1547 892 554
07-05 58° 79° 3847 2628 1574 911 568
07-06 59° 78° 3894 2664 1600 929 582
07-07 61° 75° 3940 2700 1626 947 594
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 59° 82° 3988 2739 1655 968 610
07-09 61° 84° 4039 2779 1685 991 628
07-10 61° 85° 4090 2821 1716 1014 646
07-11 63° 86° 4143 2863 1749 1039 666
07-12 68° 87° 4198 2908 1784 1066 688
07-13 68° 87° 4254 2954 1820 1093 711
07-14 66° 85° 4307 2997 1853 1118 731
07-15 67° 79° 4358 3038 1884 1141 749
07-16 63° 77° 4406 3076 1912 1161 763
07-17 53° 73° 4447 3107 1933 1174 772
07-18 53° 80° 4491 3141 1957 1191 783
07-19 62° 85° 4542 3182 1988 1214 801
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 67° 86° 4597 3227 2023 1240 822
07-21 69° 84° 4651 3271 2057 1267 844
07-22 63° 84° 4702 3313 2088 1290 862
07-23 66° 80° 4753 3354 2120 1313 880
07-24 61° 80° 4802 3392 2148 1333 896
07-25 65° 83° 4854 3434 2180 1357 915
07-26 72° 92° 4914 3484 2220 1389 942
07-27 70° 84° 4969 3529 2255 1416 964
07-28 73° 86° 5026 3577 2293 1446 988
07-29 63° 86° 5079 3619 2325 1471 1008
07-30 64° 88° 5133 3664 2359 1497 1029
07-31 70° 84° 5188 3709 2394 1524 1051
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 67° 87° 5243 3754 2430 1551 1073
08-02 66° 87° 5298 3798 2464 1577 1095
08-03 68° 90° 5355 3845 2501 1606 1119
08-04 59° 76° 5400 3880 2526 1624 1131
08-05 60° 67° 5441 3912 2548 1637 1139
08-06 52° 76° 5483 3944 2570 1651 1148
08-07 61° 68° 5526 3976 2592 1665 1158
08-08 49° 65° 5561 4001 2607 1672 1160
08-09 47° 68° 5597 4027 2623 1680 1162
08-10 47° 74° 5635 4055 2641 1691 1168
08-11 49° 78° 5676 4087 2663 1704 1176
08-12 52° 80° 5720 4121 2686 1720 1187
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 59° 81° 5768 4158 2714 1740 1202
08-14 67° 73° 5816 4196 2742 1759 1217
08-15 66° 74° 5864 4235 2770 1780 1232
08-16 66° 72° 5911 4272 2798 1799 1246
08-17 63° 80° 5961 4312 2827 1821 1263
08-18 61° 82° 6011 4351 2857 1842 1280
08-19 62° 84° 6062 4392 2888 1866 1298
08-20 66° 77° 6111 4431 2917 1887 1314
08-21 59° 79° 6158 4469 2944 1906 1328
08-22 66° 76° 6207 4507 2973 1927 1344
08-23 62° 84° 6258 4548 3004 1950 1362
08-24 68° 85° 6312 4593 3039 1976 1383
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 74° 86° 6370 4640 3076 2006 1408
08-26 66° 79° 6421 4681 3107 2028 1426
08-27 57° 72° 6463 4713 3129 2043 1435
08-28 55° 74° 6506 4746 3152 2057 1444
08-29 61° 77° 6552 4783 3178 2076 1458
08-30 53° 81° 6597 4817 3203 2093 1470
08-31 57° 81° 6644 4854 3230 2112 1484
09-01 48° 73° 6683 4883 3249 2123 1490
09-02 53° 77° 6726 4917 3272 2138 1500
09-03 60° 85° 6777 4957 3303 2160 1518
09-04 62° 75° 6823 4993 3329 2179 1531
09-05 54° 68° 6862 5022 3348 2190 1537
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 48° 68° 6898 5048 3364 2198 1540
09-07 42° 73° 6933 5074 3380 2205 1542
09-08 51° 84° 6979 5109 3405 2222 1555
09-09 54° 84° 7025 5146 3432 2241 1568
09-10 63° 82° 7076 5186 3462 2264 1586
09-11 55° 79° 7121 5222 3487 2281 1598
09-12 64° 86° 7174 5265 3521 2306 1618
09-13 67° 85° 7228 5309 3555 2332 1639
09-14 63° 82° 7279 5349 3585 2355 1657
09-15 66° 85° 7332 5393 3619 2380 1677
09-16 68° 88° 7388 5439 3655 2408 1700
09-17 70° 89° 7446 5487 3693 2438 1725
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 73° 81° 7501 5532 3727 2465 1747
09-19 66° 79° 7552 5572 3758 2487 1765
09-20 56° 81° 7598 5608 3784 2505 1778
09-21 52° 68° 7636 5636 3802 2515 1783
09-22 41° 69° 7668 5659 3814 2520 1783
09-23 49° 73° 7707 5688 3834 2531 1789
09-24 53° 74° 7749 5719 3855 2545 1797
09-25 49° 84° 7794 5754 3880 2561 1809
09-26 58° 86° 7844 5794 3910 2584 1826
09-27 54° 79° 7889 5829 3935 2600 1838
09-28 47° 87° 7934 5864 3960 2617 1850
09-29 57° 86° 7983 5904 3989 2639 1867
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 52° 74° 8024 5934 4010 2652 1874

 

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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