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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Japanese Beetle Adults Emerge, Breed and Feed (GDD 50)
through Wed, Nov. 5. 2025

 
  

Lauderdale, 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 15° 21° 0 0 0 0 0
02-16 -0° 13° 0 0 0 0 0
02-17 -13° -2° 0 0 0 0 0
02-18 -16° 4° 0 0 0 0 0
02-19 -12° 8° 0 0 0 0 0
02-20 1° 20° 0 0 0 0 0
02-21 2° 26° 0 0 0 0 0
02-22 11° 35° 1 0 0 0 0
02-23 30° 44° 16 5 0 0 0
02-24 41° 52° 40 19 4 0 0
02-25 29° 50° 58 27 4 0 0
02-26 37° 54° 81 40 8 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 48° 100 49 8 0 0
02-28 26° 45° 114 53 8 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 12° 24° 114 53 8 0 0
03-02 13° 40° 119 53 8 0 0
03-03 29° 47° 135 59 8 0 0
03-04 32° 45° 151 66 8 0 0
03-05 24° 32° 157 66 8 0 0
03-06 14° 40° 162 66 8 0 0
03-07 21° 42° 172 66 8 0 0
03-08 29° 50° 189 73 8 0 0
03-09 32° 59° 213 87 11 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 35° 63° 240 104 18 0 0
03-11 28° 49° 257 110 18 0 0
03-12 32° 57° 279 123 21 0 0
03-13 31° 62° 303 137 25 0 0
03-14 49° 75° 344 167 45 12 7
03-15 28° 53° 362 176 45 12 7
03-16 19° 39° 369 176 45 12 7
03-17 31° 61° 393 190 49 12 7
03-18 33° 48° 411 198 49 12 7
03-19 33° 38° 425 202 49 12 7
03-20 26° 46° 439 206 49 12 7
03-21 31° 50° 457 214 49 12 7
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 16° 41° 464 214 49 12 7
03-23 30° 45° 480 220 49 12 7
03-24 24° 46° 492 223 49 12 7
03-25 26° 52° 510 230 49 12 7
03-26 30° 54° 530 240 49 12 7
03-27 40° 61° 558 259 58 13 7
03-28 44° 69° 593 283 72 19 9
03-29 33° 41° 608 288 72 19 9
03-30 30° 34° 618 288 72 19 9
03-31 25° 44° 630 290 72 19 9
04-01 31° 38° 643 293 72 19 9
04-02 32° 37° 655 295 72 19 9
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 33° 44° 672 302 72 19 9
04-04 28° 50° 689 309 72 19 9
04-05 31° 43° 704 314 72 19 9
04-06 27° 58° 724 325 73 19 9
04-07 26° 43° 737 327 73 19 9
04-08 21° 49° 750 330 73 19 9
04-09 37° 61° 776 347 80 19 9
04-10 40° 51° 800 360 83 19 9
04-11 38° 55° 825 375 88 19 9
04-12 38° 67° 855 396 99 22 9
04-13 52° 65° 892 422 115 30 12
04-14 41° 59° 920 440 123 30 12
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 37° 53° 943 453 126 30 12
04-16 32° 58° 966 466 129 30 12
04-17 47° 72° 1004 494 147 40 17
04-18 45° 57° 1033 513 156 41 17
04-19 33° 53° 1054 524 157 41 17
04-20 35° 55° 1077 537 160 41 17
04-21 37° 60° 1103 554 167 41 17
04-22 48° 69° 1140 580 183 50 20
04-23 47° 68° 1175 606 199 57 23
04-24 45° 51° 1201 621 204 57 23
04-25 42° 56° 1228 638 211 57 23
04-26 35° 63° 1255 655 218 57 23
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 49° 64° 1289 680 233 64 25
04-28 57° 70° 1331 711 254 78 33
04-29 42° 58° 1359 730 263 78 33
04-30 38° 69° 1391 751 274 81 33
05-01 52° 64° 1427 777 290 90 36
05-02 44° 52° 1453 793 296 90 36
05-03 42° 65° 1485 815 308 93 36
05-04 45° 79° 1525 845 328 106 44
05-05 53° 75° 1567 878 351 120 53
05-06 49° 82° 1611 911 374 135 63
05-07 53° 70° 1650 941 394 147 70
05-08 43° 70° 1685 965 408 154 72
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 45° 84° 1727 998 431 168 81
05-10 52° 74° 1768 1029 452 181 89
05-11 57° 89° 1819 1069 482 203 107
05-12 58° 86° 1869 1109 512 225 124
05-13 61° 86° 1920 1151 544 249 142
05-14 63° 84° 1972 1192 575 272 161
05-15 59° 78° 2018 1229 602 291 174
05-16 50° 60° 2051 1252 615 296 174
05-17 45° 51° 2077 1268 621 296 174
05-18 42° 55° 2104 1284 627 296 174
05-19 38° 58° 2130 1301 634 296 174
05-20 42° 48° 2153 1314 637 296 174
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 44° 49° 2178 1328 641 296 174
05-22 40° 64° 2208 1348 651 298 174
05-23 42° 63° 2238 1369 662 300 174
05-24 43° 65° 2270 1391 674 305 174
05-25 43° 68° 2304 1414 687 310 175
05-26 45° 71° 2340 1441 704 318 178
05-27 56° 63° 2377 1468 721 328 182
05-28 53° 59° 2412 1492 735 334 183
05-29 54° 71° 2452 1523 756 346 191
05-30 54° 77° 2496 1556 779 362 201
05-31 56° 77° 2540 1590 803 378 213
06-01 51° 79° 2583 1624 827 394 223
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 63° 90° 2638 1668 861 420 245
06-03 54° 70° 2678 1698 881 432 252
06-04 50° 76° 2719 1729 902 445 259
06-05 51° 78° 2761 1762 925 459 269
06-06 60° 71° 2805 1795 948 475 279
06-07 57° 75° 2849 1829 972 491 290
06-08 58° 70° 2891 1861 994 505 299
06-09 51° 66° 2927 1887 1010 513 303
06-10 58° 80° 2974 1924 1037 532 317
06-11 61° 71° 3018 1959 1062 548 328
06-12 57° 70° 3060 1990 1083 562 336
06-13 52° 59° 3093 2013 1096 567 337
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 53° 62° 3129 2039 1112 575 339
06-15 58° 73° 3172 2072 1135 590 350
06-16 64° 79° 3222 2112 1165 612 366
06-17 61° 79° 3270 2150 1193 632 382
06-18 61° 81° 3319 2189 1222 653 397
06-19 60° 86° 3369 2230 1253 675 415
06-20 69° 83° 3423 2274 1287 701 436
06-21 79° 94° 3488 2328 1331 738 468
06-22 81° 93° 3553 2384 1377 775 500
06-23 71° 87° 3611 2431 1414 805 524
06-24 61° 78° 3658 2469 1442 824 539
06-25 63° 70° 3703 2503 1466 841 551
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 61° 65° 3744 2534 1487 854 559
06-27 58° 71° 3786 2567 1510 869 568
06-28 61° 82° 3836 2606 1539 890 584
06-29 67° 81° 3888 2648 1571 914 603
06-30 63° 80° 3937 2687 1600 935 619
07-01 63° 84° 3988 2729 1632 958 638
07-02 65° 88° 4043 2773 1666 985 659
07-03 69° 89° 4100 2820 1703 1014 683
07-04 78° 92° 4163 2873 1746 1049 714
07-05 72° 82° 4218 2918 1781 1076 735
07-06 66° 83° 4270 2961 1814 1101 755
07-07 61° 84° 4321 3001 1844 1123 772
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 64° 83° 4372 3043 1876 1146 791
07-09 63° 83° 4424 3084 1907 1170 809
07-10 69° 80° 4476 3127 1940 1194 829
07-11 67° 84° 4530 3170 1973 1220 850
07-12 67° 78° 4580 3211 2004 1242 867
07-13 61° 86° 4632 3252 2035 1266 885
07-14 68° 89° 4689 3299 2072 1295 909
07-15 72° 92° 4749 3349 2112 1327 937
07-16 56° 71° 4790 3381 2134 1340 945
07-17 50° 72° 4829 3410 2153 1351 951
07-18 56° 73° 4872 3442 2175 1366 961
07-19 65° 76° 4921 3481 2204 1387 976
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 57° 79° 4967 3517 2230 1405 990
07-21 62° 79° 5016 3556 2259 1426 1005
07-22 73° 87° 5074 3604 2297 1456 1030
07-23 70° 80° 5127 3647 2330 1481 1050
07-24 69° 83° 5180 3691 2364 1507 1071
07-25 64° 84° 5232 3733 2396 1531 1090
07-26 68° 88° 5289 3779 2432 1559 1114
07-27 71° 90° 5348 3828 2471 1590 1139
07-28 66° 86° 5402 3872 2505 1616 1160
07-29 65° 83° 5454 3914 2537 1640 1180
07-30 68° 79° 5505 3956 2569 1663 1198
07-31 56° 76° 5549 3990 2593 1680 1209
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 59° 77° 5595 4026 2619 1697 1222
08-02 56° 78° 5640 4061 2644 1714 1234
08-03 59° 76° 5686 4096 2669 1732 1246
08-04 65° 76° 5734 4134 2697 1752 1262
08-05 60° 80° 5782 4173 2726 1772 1277
08-06 68° 81° 5835 4215 2758 1797 1296
08-07 67° 85° 5889 4259 2792 1823 1318
08-08 71° 87° 5946 4306 2829 1852 1342
08-09 69° 82° 5999 4350 2863 1877 1362
08-10 67° 82° 6051 4392 2895 1902 1381
08-11 61° 77° 6099 4429 2922 1921 1395
08-12 68° 80° 6151 4471 2954 1945 1414
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 60° 79° 6198 4508 2981 1964 1429
08-14 65° 76° 6247 4547 3010 1985 1445
08-15 69° 84° 6301 4592 3045 2011 1466
08-16 69° 82° 6354 4635 3078 2036 1486
08-17 69° 78° 6406 4676 3109 2060 1504
08-18 67° 77° 6455 4716 3139 2081 1521
08-19 68° 85° 6510 4760 3173 2108 1542
08-20 66° 80° 6561 4801 3204 2131 1560
08-21 64° 82° 6612 4842 3235 2154 1578
08-22 68° 77° 6662 4883 3266 2176 1596
08-23 58° 70° 6705 4915 3288 2191 1605
08-24 56° 65° 6743 4943 3306 2201 1611
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 50° 68° 6780 4970 3323 2210 1615
08-26 54° 74° 6822 5002 3345 2224 1623
08-27 54° 78° 6866 5036 3369 2240 1635
08-28 59° 78° 6912 5073 3396 2258 1648
08-29 60° 75° 6958 5108 3421 2276 1661
08-30 58° 76° 7003 5143 3446 2293 1673
08-31 53° 77° 7046 5176 3469 2308 1683
09-01 57° 79° 7092 5212 3495 2326 1695
09-02 59° 74° 7136 5246 3519 2342 1707
09-03 50° 66° 7172 5272 3535 2350 1710
09-04 44° 59° 7202 5292 3545 2352 1710
09-05 45° 58° 7231 5311 3554 2353 1710
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 44° 58° 7260 5330 3563 2354 1710
09-07 42° 63° 7290 5351 3574 2356 1710
09-08 46° 77° 7330 5381 3594 2368 1717
09-09 63° 68° 7374 5414 3617 2384 1727
09-10 61° 72° 7418 5449 3642 2400 1739
09-11 55° 76° 7462 5482 3665 2416 1749
09-12 61° 82° 7511 5521 3694 2437 1765
09-13 64° 82° 7562 5563 3726 2460 1784
09-14 67° 84° 7616 5606 3759 2486 1804
09-15 71° 80° 7669 5650 3793 2512 1825
09-16 68° 90° 7727 5697 3830 2541 1849
09-17 65° 81° 7778 5738 3861 2564 1867
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 64° 81° 7829 5779 3892 2587 1885
09-19 65° 74° 7876 5816 3919 2606 1899
09-20 63° 70° 7921 5851 3944 2623 1911
09-21 64° 76° 7968 5889 3972 2643 1926
09-22 58° 73° 8012 5922 3995 2658 1937
09-23 58° 73° 8056 5956 4019 2674 1947
09-24 55° 73° 8098 5988 4041 2688 1956
09-25 54° 80° 8143 6024 4067 2705 1969
09-26 56° 76° 8187 6058 4091 2721 1980
09-27 54° 72° 8228 6089 4112 2735 1988
09-28 47° 77° 8269 6119 4132 2747 1995
09-29 53° 85° 8316 6156 4159 2766 2009
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 64° 81° 8366 6196 4189 2788 2027
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 16° 29° 0 0 0 0 0
02-16 8° 18° 0 0 0 0 0
02-17 8° 27° 0 0 0 0 0
02-18 22° 35° 7 0 0 0 0
02-19 20° 38° 14 0 0 0 0
02-20 29° 45° 29 5 0 0 0
02-21 22° 47° 41 8 0 0 0
02-22 28° 51° 59 15 0 0 0
02-23 22° 35° 65 15 0 0 0
02-24 17° 43° 73 15 0 0 0
02-25 32° 48° 91 23 0 0 0
02-26 28° 62° 114 36 3 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 15° 51° 125 37 3 0 0
02-28 5° 19° 125 37 3 0 0
02-29 11° 49° 133 37 3 0 0
03-01 35° 57° 158 51 7 0 0
03-02 33° 61° 182 66 12 0 0
03-03 41° 65° 213 87 23 3 0
03-04 30° 40° 226 90 23 3 0
03-05 23° 47° 239 93 23 3 0
03-06 27° 52° 257 101 23 3 0
03-07 33° 45° 274 108 23 3 0
03-08 25° 38° 283 108 23 3 0
03-09 20° 39° 291 108 23 3 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 18° 49° 303 110 23 3 0
03-11 33° 65° 330 127 30 3 0
03-12 42° 66° 362 149 42 7 0
03-13 37° 64° 391 167 50 7 0
03-14 43° 58° 419 186 59 8 0
03-15 30° 50° 437 193 59 8 0
03-16 33° 49° 456 202 59 8 0
03-17 24° 32° 462 202 59 8 0
03-18 20° 37° 468 202 59 8 0
03-19 33° 50° 488 212 59 8 0
03-20 17° 32° 491 212 59 8 0
03-21 21° 31° 495 212 59 8 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 24° 32° 501 212 59 8 0
03-23 15° 32° 502 212 59 8 0
03-24 27° 31° 509 212 59 8 0
03-25 32° 36° 521 214 59 8 0
03-26 21° 34° 527 214 59 8 0
03-27 17° 29° 528 214 59 8 0
03-28 19° 36° 533 214 59 8 0
03-29 23° 43° 544 215 59 8 0
03-30 33° 44° 561 222 59 8 0
03-31 32° 45° 577 228 59 8 0
04-01 31° 44° 593 234 59 8 0
04-02 33° 41° 608 239 59 8 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 34° 49° 627 248 59 8 0
04-04 33° 51° 647 258 59 8 0
04-05 30° 56° 668 269 60 8 0
04-06 34° 58° 692 283 64 8 0
04-07 39° 47° 713 294 65 8 0
04-08 42° 48° 736 307 68 8 0
04-09 41° 60° 764 326 76 8 0
04-10 41° 69° 797 349 89 13 0
04-11 44° 59° 827 368 99 14 0
04-12 43° 59° 856 387 108 15 0
04-13 37° 83° 893 415 125 25 5
04-14 46° 70° 929 440 141 33 8
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 46° 60° 960 462 152 36 8
04-16 47° 54° 989 480 161 37 8
04-17 43° 51° 1014 495 166 37 8
04-18 44° 51° 1040 511 172 37 8
04-19 33° 40° 1054 515 172 37 8
04-20 31° 46° 1071 522 172 37 8
04-21 32° 52° 1091 532 172 37 8
04-22 39° 68° 1123 554 184 40 8
04-23 43° 59° 1152 573 193 41 8
04-24 32° 57° 1174 586 195 41 8
04-25 43° 67° 1207 609 208 46 8
04-26 46° 53° 1235 627 216 46 8
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 49° 57° 1266 647 227 49 8
04-28 45° 52° 1292 664 233 49 8
04-29 43° 50° 1317 678 237 49 8
04-30 42° 68° 1350 701 251 55 8
05-01 50° 63° 1384 726 265 61 10
05-02 48° 56° 1414 746 275 63 10
05-03 44° 70° 1449 771 290 70 12
05-04 47° 60° 1481 792 301 73 12
05-05 40° 69° 1513 815 314 78 12
05-06 47° 72° 1551 842 332 88 16
05-07 56° 70° 1592 873 353 101 24
05-08 46° 75° 1631 902 371 111 30
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 48° 65° 1665 926 386 118 31
05-10 41° 72° 1699 951 400 124 33
05-11 45° 74° 1737 978 418 134 37
05-12 59° 85° 1787 1018 448 155 54
05-13 50° 70° 1825 1046 466 165 59
05-14 47° 71° 1862 1073 483 174 63
05-15 47° 72° 1899 1101 500 184 68
05-16 57° 69° 1940 1131 521 197 75
05-17 54° 84° 1987 1168 548 216 89
05-18 64° 81° 2037 1208 578 238 106
05-19 49° 70° 2075 1236 596 248 111
05-20 57° 75° 2119 1270 620 264 122
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 62° 71° 2163 1305 644 280 133
05-22 54° 68° 2202 1334 663 291 139
05-23 55° 76° 2246 1367 687 306 150
05-24 51° 72° 2285 1396 706 318 156
05-25 47° 73° 2323 1424 724 328 161
05-26 57° 68° 2364 1455 745 341 169
05-27 49° 63° 2398 1479 759 347 170
05-28 53° 63° 2434 1505 775 355 173
05-29 46° 70° 2470 1531 791 363 176
05-30 54° 76° 2514 1565 814 378 187
05-31 61° 67° 2556 1597 836 392 196
06-01 60° 75° 2601 1633 862 410 209
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 55° 76° 2645 1666 886 426 219
06-03 63° 81° 2695 1706 916 448 236
06-04 63° 84° 2747 1748 948 472 255
06-05 56° 78° 2792 1783 973 489 267
06-06 60° 69° 2835 1816 996 503 277
06-07 57° 77° 2880 1851 1020 520 289
06-08 58° 75° 2924 1885 1045 537 300
06-09 56° 70° 2965 1916 1066 550 308
06-10 50° 74° 3005 1946 1086 562 315
06-11 57° 81° 3052 1983 1113 581 329
06-12 58° 79° 3099 2020 1140 599 343
06-13 63° 83° 3150 2061 1171 622 361
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 58° 79° 3196 2097 1197 641 374
06-15 62° 69° 3240 2131 1221 656 385
06-16 63° 86° 3292 2173 1253 681 404
06-17 55° 77° 3336 2207 1277 697 415
06-18 65° 83° 3388 2249 1309 721 434
06-19 62° 72° 3433 2284 1334 738 446
06-20 58° 66° 3473 2314 1354 750 453
06-21 64° 70° 3518 2349 1379 766 465
06-22 62° 73° 3563 2385 1404 784 477
06-23 53° 82° 3609 2420 1429 801 490
06-24 62° 83° 3659 2460 1460 824 507
06-25 71° 84° 3715 2506 1496 851 530
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 64° 78° 3764 2545 1525 872 546
06-27 57° 74° 3807 2579 1548 888 557
06-28 64° 76° 3855 2617 1576 908 571
06-29 61° 70° 3899 2650 1600 923 582
06-30 50° 74° 3938 2679 1619 935 588
07-01 56° 75° 3982 2713 1643 950 599
07-02 59° 70° 4024 2745 1665 965 608
07-03 64° 85° 4076 2788 1697 989 627
07-04 63° 69° 4120 2821 1721 1005 638
07-05 62° 75° 4167 2858 1748 1023 652
07-06 58° 80° 4214 2895 1775 1043 666
07-07 63° 79° 4263 2935 1804 1064 683
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 65° 79° 4313 2975 1834 1086 699
07-09 63° 83° 4364 3016 1865 1109 717
07-10 65° 81° 4415 3056 1896 1132 735
07-11 62° 85° 4467 3098 1928 1155 754
07-12 67° 86° 4522 3143 1962 1182 776
07-13 71° 80° 4575 3186 1996 1208 796
07-14 67° 87° 4630 3231 2031 1235 818
07-15 69° 83° 4684 3275 2065 1261 839
07-16 63° 79° 4733 3314 2094 1282 855
07-17 59° 74° 4778 3349 2118 1298 867
07-18 57° 78° 4823 3384 2143 1315 879
07-19 60° 80° 4870 3422 2171 1335 893
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 66° 81° 4922 3463 2203 1359 912
07-21 66° 78° 4972 3503 2233 1381 929
07-22 65° 83° 5025 3546 2265 1405 949
07-23 64° 74° 5071 3583 2292 1424 962
07-24 61° 75° 5117 3618 2318 1442 975
07-25 56° 81° 5164 3655 2344 1460 989
07-26 65° 84° 5216 3697 2377 1485 1008
07-27 72° 90° 5275 3746 2416 1516 1034
07-28 71° 88° 5333 3794 2454 1546 1059
07-29 69° 85° 5388 3839 2489 1573 1081
07-30 69° 87° 5444 3885 2525 1601 1104
07-31 71° 89° 5503 3934 2563 1631 1130
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 66° 75° 5551 3972 2592 1651 1145
08-02 65° 90° 5606 4017 2627 1679 1167
08-03 61° 84° 5657 4058 2657 1701 1185
08-04 67° 82° 5709 4100 2690 1726 1204
08-05 59° 72° 5753 4134 2713 1741 1215
08-06 55° 76° 5796 4167 2737 1757 1225
08-07 56° 75° 5840 4201 2761 1773 1236
08-08 60° 69° 5882 4233 2783 1787 1245
08-09 56° 68° 5923 4264 2803 1799 1253
08-10 53° 72° 5963 4294 2824 1812 1260
08-11 52° 78° 6006 4327 2847 1827 1270
08-12 53° 81° 6051 4362 2872 1844 1282
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 57° 82° 6099 4400 2900 1863 1297
08-14 62° 81° 6148 4439 2929 1885 1313
08-15 64° 78° 6197 4478 2958 1905 1329
08-16 65° 77° 6246 4517 2987 1927 1345
08-17 67° 75° 6295 4556 3016 1948 1361
08-18 61° 80° 6344 4595 3045 1968 1377
08-19 57° 80° 6390 4631 3071 1987 1390
08-20 61° 74° 6436 4667 3097 2004 1403
08-21 58° 77° 6482 4703 3122 2022 1416
08-22 59° 71° 6525 4736 3146 2037 1426
08-23 64° 79° 6574 4775 3175 2059 1442
08-24 64° 85° 6626 4818 3207 2083 1462
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 73° 86° 6684 4865 3245 2113 1486
08-26 70° 92° 6743 4915 3284 2144 1512
08-27 68° 75° 6793 4954 3314 2166 1529
08-28 63° 72° 6838 4989 3339 2183 1541
08-29 65° 86° 6892 5033 3372 2208 1562
08-30 60° 78° 6938 5070 3399 2227 1575
08-31 58° 84° 6987 5109 3428 2248 1591
09-01 55° 72° 7029 5140 3450 2262 1600
09-02 52° 74° 7070 5171 3471 2274 1608
09-03 57° 77° 7115 5206 3496 2292 1620
09-04 58° 81° 7162 5244 3523 2311 1634
09-05 63° 74° 7209 5280 3550 2329 1648
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 52° 66° 7246 5307 3567 2338 1652
09-07 45° 68° 7280 5331 3581 2345 1653
09-08 52° 77° 7323 5364 3604 2360 1663
09-09 56° 81° 7370 5401 3631 2378 1677
09-10 62° 80° 7419 5440 3660 2400 1693
09-11 62° 84° 7470 5481 3691 2422 1711
09-12 59° 84° 7520 5521 3720 2444 1728
09-13 61° 82° 7569 5560 3750 2466 1744
09-14 67° 74° 7617 5599 3778 2486 1760
09-15 67° 86° 7672 5643 3813 2512 1781
09-16 68° 87° 7727 5688 3848 2540 1803
09-17 68° 87° 7783 5734 3883 2567 1826
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 67° 84° 7837 5778 3917 2593 1847
09-19 68° 84° 7891 5822 3952 2619 1868
09-20 60° 81° 7939 5860 3980 2640 1883
09-21 62° 80° 7988 5899 4009 2660 1899
09-22 52° 68° 8026 5927 4026 2670 1904
09-23 45° 69° 8061 5952 4042 2677 1906
09-24 52° 72° 8101 5982 4062 2689 1913
09-25 53° 78° 8144 6015 4085 2705 1923
09-26 55° 82° 8190 6052 4111 2723 1936
09-27 54° 82° 8237 6088 4138 2741 1950
09-28 56° 84° 8285 6126 4166 2762 1965
09-29 55° 82° 8332 6163 4192 2780 1979
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 59° 83° 8381 6202 4222 2801 1995

 

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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