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Japanese Beetle Adults Emerge, Breed and Feed (GDD 50)
through Sat, Dec. 20. 2025

 
  

Livonia, MI

        

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 20° 32° 4 0 0 0 0
02-16 21° 29° 7 0 0 0 0
02-17 6° 21° 7 0 0 0 0
02-18 -1° 16° 7 0 0 0 0
02-19 1° 17° 7 0 0 0 0
02-20 13° 22° 7 0 0 0 0
02-21 20° 31° 11 0 0 0 0
02-22 16° 29° 11 0 0 0 0
02-23 21° 36° 18 0 0 0 0
02-24 31° 51° 37 9 0 0 0
02-25 38° 54° 60 23 4 0 0
02-26 28° 38° 71 24 4 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 43° 88 30 4 0 0
02-28 29° 55° 108 40 4 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 21° 39° 116 40 4 0 0
03-02 17° 29° 116 40 4 0 0
03-03 19° 39° 123 40 4 0 0
03-04 34° 47° 142 48 4 0 0
03-05 36° 54° 165 61 7 0 0
03-06 26° 35° 173 61 7 0 0
03-07 28° 38° 184 62 7 0 0
03-08 22° 37° 192 62 7 0 0
03-09 32° 55° 213 74 8 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 34° 64° 240 91 16 0 0
03-11 33° 57° 263 104 19 0 0
03-12 29° 46° 279 110 19 0 0
03-13 27° 58° 300 121 20 0 0
03-14 34° 72° 331 142 31 3 0
03-15 55° 73° 374 174 53 17 9
03-16 31° 58° 396 187 56 17 9
03-17 27° 45° 410 191 56 17 9
03-18 34° 68° 439 210 65 18 9
03-19 54° 72° 480 241 86 32 17
03-20 32° 58° 503 254 89 32 17
03-21 26° 52° 520 261 89 32 17
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 29° 48° 536 267 89 32 17
03-23 22° 39° 545 267 89 32 17
03-24 33° 42° 560 273 89 32 17
03-25 28° 44° 574 277 89 32 17
03-26 28° 44° 588 280 89 32 17
03-27 26° 55° 606 289 89 32 17
03-28 41° 66° 638 310 100 35 17
03-29 58° 68° 679 341 121 48 25
03-30 52° 67° 716 369 139 57 30
03-31 38° 57° 742 384 144 57 30
04-01 24° 42° 753 386 144 57 30
04-02 33° 49° 772 394 144 57 30
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 45° 64° 805 417 157 62 30
04-04 36° 51° 826 429 159 62 30
04-05 42° 49° 850 442 162 62 30
04-06 34° 45° 868 450 162 62 30
04-07 27° 45° 882 455 162 62 30
04-08 23° 37° 890 455 162 62 30
04-09 23° 45° 902 457 162 62 30
04-10 32° 37° 915 459 162 62 30
04-11 31° 52° 934 469 162 62 30
04-12 28° 56° 954 478 162 62 30
04-13 39° 56° 979 494 167 62 30
04-14 46° 71° 1016 520 184 70 33
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 41° 52° 1040 534 188 70 33
04-16 35° 52° 1061 546 189 70 33
04-17 31° 60° 1085 559 193 70 33
04-18 49° 81° 1128 592 216 86 43
04-19 50° 69° 1165 620 233 95 48
04-20 39° 57° 1191 636 239 95 48
04-21 47° 72° 1229 663 257 105 52
04-22 42° 65° 1260 685 268 108 52
04-23 47° 77° 1300 714 288 120 59
04-24 47° 83° 1343 747 311 135 69
04-25 53° 75° 1385 779 333 149 78
04-26 43° 60° 1415 799 343 150 78
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 37° 67° 1444 819 352 152 78
04-28 43° 73° 1480 844 368 160 81
04-29 52° 84° 1526 881 394 178 94
04-30 37° 64° 1555 899 403 179 94
05-01 45° 69° 1590 925 418 186 96
05-02 55° 69° 1630 954 438 198 103
05-03 45° 53° 1657 971 445 198 103
05-04 41° 52° 1682 986 450 198 103
05-05 48° 67° 1717 1012 465 205 106
05-06 53° 59° 1752 1036 480 212 107
05-07 51° 76° 1793 1067 501 225 115
05-08 43° 58° 1822 1086 510 226 115
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 35° 65° 1849 1104 517 226 115
05-10 46° 78° 1889 1134 537 238 122
05-11 44° 68° 1924 1158 552 244 124
05-12 45° 81° 1965 1189 573 257 132
05-13 63° 68° 2008 1222 596 272 142
05-14 59° 75° 2053 1257 621 289 154
05-15 58° 82° 2101 1295 649 309 169
05-16 59° 83° 2149 1334 677 330 184
05-17 57° 71° 2191 1366 699 344 193
05-18 53° 64° 2228 1392 716 352 197
05-19 46° 59° 2258 1412 726 354 197
05-20 39° 55° 2283 1427 731 354 197
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 48° 52° 2311 1445 739 354 197
05-22 48° 53° 2340 1464 748 355 197
05-23 41° 54° 2365 1479 753 355 197
05-24 42° 62° 2395 1499 763 357 197
05-25 40° 65° 2425 1520 773 359 197
05-26 43° 71° 2460 1544 788 366 198
05-27 51° 72° 2499 1574 807 377 205
05-28 53° 59° 2533 1597 821 383 206
05-29 55° 65° 2571 1625 839 393 211
05-30 51° 76° 2613 1657 861 407 219
05-31 50° 64° 2648 1682 876 414 221
06-01 41° 68° 2680 1705 888 418 221
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 44° 79° 2720 1734 908 430 227
06-03 54° 88° 2768 1773 936 450 243
06-04 65° 84° 2821 1815 969 475 263
06-05 55° 67° 2860 1844 988 486 269
06-06 58° 76° 2905 1879 1013 503 281
06-07 54° 78° 2949 1914 1037 519 292
06-08 58° 77° 2995 1949 1063 537 304
06-09 59° 78° 3041 1985 1089 555 318
06-10 51° 73° 3081 2015 1109 567 325
06-11 53° 85° 3128 2053 1136 586 339
06-12 61° 76° 3175 2089 1163 605 353
06-13 57° 71° 3217 2121 1185 619 362
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 56° 77° 3262 2156 1210 636 373
06-15 55° 81° 3308 2192 1236 654 386
06-16 58° 83° 3356 2230 1264 674 402
06-17 62° 88° 3409 2273 1297 699 422
06-18 67° 81° 3461 2315 1329 723 441
06-19 62° 74° 3507 2352 1355 741 454
06-20 59° 79° 3554 2388 1382 760 468
06-21 67° 91° 3611 2435 1419 789 491
06-22 78° 94° 3675 2489 1463 825 522
06-23 75° 95° 3737 2542 1505 859 552
06-24 75° 93° 3799 2593 1547 893 581
06-25 71° 82° 3854 2638 1582 920 603
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 84° 3907 2681 1615 945 622
06-27 72° 90° 3966 2730 1654 976 648
06-28 68° 81° 4018 2772 1686 1000 668
06-29 62° 87° 4071 2815 1719 1025 687
06-30 69° 83° 4124 2859 1752 1050 708
07-01 71° 84° 4180 2905 1788 1078 731
07-02 62° 86° 4232 2947 1820 1102 750
07-03 67° 86° 4287 2991 1855 1129 771
07-04 62° 89° 4340 3034 1888 1154 792
07-05 67° 91° 4397 3081 1925 1183 816
07-06 71° 92° 4457 3131 1965 1215 843
07-07 66° 76° 4506 3170 1994 1236 859
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 55° 84° 4554 3208 2022 1256 874
07-09 69° 79° 4606 3250 2054 1280 893
07-10 63° 85° 4658 3293 2086 1304 912
07-11 65° 85° 4712 3336 2120 1330 932
07-12 72° 87° 4769 3383 2157 1359 957
07-13 70° 87° 4826 3430 2194 1388 981
07-14 64° 85° 4878 3472 2226 1412 1000
07-15 63° 89° 4932 3516 2260 1438 1021
07-16 71° 84° 4987 3562 2295 1465 1043
07-17 67° 76° 5037 3601 2325 1487 1059
07-18 55° 78° 5081 3635 2349 1503 1071
07-19 58° 82° 5129 3674 2377 1523 1086
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 65° 79° 5179 3714 2407 1545 1103
07-21 57° 78° 5225 3749 2433 1563 1116
07-22 54° 82° 5271 3785 2459 1581 1129
07-23 57° 88° 5322 3826 2490 1604 1147
07-24 72° 96° 5384 3878 2532 1638 1176
07-25 72° 85° 5440 3925 2568 1666 1199
07-26 70° 81° 5494 3969 2602 1692 1220
07-27 73° 91° 5554 4018 2642 1724 1247
07-28 69° 89° 5611 4065 2679 1753 1271
07-29 69° 87° 5667 4111 2715 1781 1294
07-30 63° 86° 5719 4154 2747 1805 1313
07-31 59° 74° 5764 4189 2772 1822 1325
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 56° 76° 5809 4223 2797 1839 1336
08-02 54° 79° 5853 4257 2821 1855 1347
08-03 56° 81° 5899 4293 2847 1873 1361
08-04 58° 82° 5947 4331 2875 1893 1376
08-05 63° 84° 5998 4373 2906 1916 1394
08-06 65° 83° 6051 4415 2939 1941 1413
08-07 65° 85° 6104 4458 2972 1966 1433
08-08 65° 87° 6158 4502 3006 1992 1454
08-09 68° 89° 6214 4548 3042 2020 1478
08-10 68° 91° 6272 4596 3080 2050 1503
08-11 69° 90° 6330 4644 3118 2080 1528
08-12 70° 90° 6388 4692 3156 2110 1553
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 69° 83° 6442 4736 3190 2136 1574
08-14 63° 84° 6493 4777 3221 2159 1592
08-15 63° 86° 6546 4820 3254 2184 1612
08-16 66° 90° 6602 4866 3290 2212 1634
08-17 64° 82° 6653 4907 3321 2235 1652
08-18 55° 80° 6698 4942 3346 2252 1665
08-19 63° 76° 6746 4980 3374 2272 1680
08-20 65° 70° 6791 5015 3399 2289 1692
08-21 63° 74° 6838 5052 3426 2308 1706
08-22 55° 82° 6884 5089 3452 2326 1719
08-23 63° 78° 6933 5127 3481 2347 1735
08-24 55° 75° 6976 5161 3504 2362 1745
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 53° 67° 7015 5189 3523 2373 1750
08-26 48° 70° 7051 5216 3539 2381 1754
08-27 47° 74° 7090 5244 3558 2392 1760
08-28 52° 70° 7129 5273 3577 2403 1766
08-29 47° 66° 7164 5298 3592 2410 1768
08-30 44° 72° 7200 5324 3608 2418 1771
08-31 46° 76° 7239 5354 3627 2429 1777
09-01 48° 78° 7281 5385 3649 2443 1785
09-02 51° 79° 7324 5418 3672 2458 1795
09-03 51° 81° 7368 5452 3696 2474 1807
09-04 52° 67° 7405 5479 3713 2483 1811
09-05 45° 72° 7441 5506 3729 2491 1814
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 50° 64° 7476 5531 3744 2498 1816
09-07 42° 67° 7509 5553 3757 2503 1816
09-08 43° 70° 7543 5578 3771 2509 1818
09-09 45° 75° 7581 5606 3789 2519 1823
09-10 50° 78° 7624 5638 3812 2534 1832
09-11 50° 80° 7667 5671 3835 2549 1842
09-12 51° 81° 7711 5705 3859 2565 1853
09-13 54° 78° 7755 5739 3883 2581 1864
09-14 51° 82° 7799 5774 3907 2597 1876
09-15 55° 83° 7846 5811 3934 2616 1890
09-16 53° 83° 7893 5847 3961 2635 1903
09-17 53° 83° 7939 5883 3987 2653 1916
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 55° 87° 7988 5922 4016 2674 1932
09-19 63° 80° 8037 5962 4045 2695 1949
09-20 56° 79° 8083 5998 4071 2713 1961
09-21 58° 71° 8126 6030 4094 2728 1971
09-22 62° 76° 8173 6067 4121 2747 1985
09-23 59° 73° 8217 6101 4145 2763 1996
09-24 64° 74° 8264 6138 4172 2782 2010
09-25 61° 76° 8310 6175 4198 2800 2023
09-26 55° 80° 8356 6210 4224 2818 2036
09-27 55° 86° 8404 6249 4252 2838 2052
09-28 59° 82° 8453 6288 4281 2859 2067
09-29 50° 83° 8498 6322 4306 2876 2079
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 52° 82° 8543 6357 4331 2893 2091
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 27° 38° 10 0 0 0 0
02-16 24° 30° 15 0 0 0 0
02-17 18° 26° 15 0 0 0 0
02-18 18° 36° 20 0 0 0 0
02-19 19° 39° 27 0 0 0 0
02-20 22° 48° 40 3 0 0 0
02-21 30° 60° 63 16 3 0 0
02-22 35° 53° 85 28 5 0 0
02-23 25° 50° 101 34 5 0 0
02-24 20° 33° 105 34 5 0 0
02-25 25° 49° 119 38 5 0 0
02-26 33° 55° 142 50 7 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 41° 72° 176 75 22 7 2
02-28 23° 61° 196 85 22 7 2
02-29 21° 37° 203 85 22 7 2
03-01 26° 46° 217 89 22 7 2
03-02 37° 52° 240 102 24 7 2
03-03 35° 59° 264 117 29 7 2
03-04 40° 72° 298 141 43 13 3
03-05 42° 58° 326 159 51 13 3
03-06 38° 45° 346 168 51 13 3
03-07 38° 52° 369 181 54 13 3
03-08 41° 51° 393 195 58 13 3
03-09 35° 54° 415 207 61 13 3
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 38° 427 209 61 13 3
03-11 28° 55° 447 219 61 13 3
03-12 41° 68° 480 242 73 18 3
03-13 49° 70° 517 269 91 27 7
03-14 45° 56° 545 288 99 28 7
03-15 38° 48° 566 299 100 28 7
03-16 33° 58° 590 312 104 28 7
03-17 31° 42° 604 316 104 28 7
03-18 25° 34° 612 316 104 28 7
03-19 30° 46° 627 322 104 28 7
03-20 25° 38° 637 322 104 28 7
03-21 21° 36° 643 322 104 28 7
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 26° 30° 649 322 104 28 7
03-23 26° 34° 657 322 104 28 7
03-24 22° 40° 666 322 104 28 7
03-25 31° 62° 691 337 108 28 7
03-26 45° 58° 720 356 118 29 7
03-27 29° 43° 734 360 118 29 7
03-28 25° 47° 748 364 118 29 7
03-29 27° 52° 766 372 118 29 7
03-30 35° 42° 782 378 118 29 7
03-31 37° 45° 801 387 118 29 7
04-01 37° 54° 825 401 121 29 7
04-02 39° 47° 845 411 122 29 7
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 37° 47° 866 422 122 29 7
04-04 33° 48° 884 430 122 29 7
04-05 34° 47° 903 439 122 29 7
04-06 38° 57° 928 454 127 29 7
04-07 31° 57° 950 466 130 29 7
04-08 47° 72° 988 494 147 39 12
04-09 47° 75° 1027 523 166 49 18
04-10 43° 65° 1059 545 178 53 18
04-11 46° 55° 1087 563 187 54 18
04-12 45° 51° 1113 579 193 54 18
04-13 41° 61° 1142 598 202 55 18
04-14 48° 79° 1183 629 223 68 26
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 46° 64° 1216 653 236 73 26
04-16 45° 65° 1249 675 249 78 26
04-17 52° 69° 1288 704 267 88 32
04-18 51° 65° 1324 730 283 96 35
04-19 44° 58° 1353 749 292 97 35
04-20 37° 46° 1372 758 292 97 35
04-21 36° 45° 1391 767 292 97 35
04-22 33° 63° 1416 783 298 97 35
04-23 48° 57° 1447 803 309 100 35
04-24 34° 49° 1466 812 309 100 35
04-25 26° 54° 1485 821 309 100 35
04-26 34° 63° 1511 837 315 100 35
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 52° 80° 1555 871 339 116 46
04-28 62° 77° 1602 908 366 135 60
04-29 60° 80° 1650 946 394 155 75
04-30 54° 71° 1691 977 415 168 83
05-01 49° 80° 1734 1010 438 182 92
05-02 49° 72° 1772 1038 456 193 98
05-03 57° 70° 1813 1069 477 206 106
05-04 55° 73° 1855 1101 499 220 115
05-05 56° 68° 1895 1132 520 232 122
05-06 47° 67° 1930 1157 535 239 124
05-07 45° 69° 1965 1181 549 246 126
05-08 53° 77° 2008 1214 572 261 136
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 49° 58° 2040 1236 584 265 136
05-10 44° 64° 2072 1258 596 268 136
05-11 50° 56° 2102 1278 606 271 136
05-12 42° 70° 2137 1303 621 277 137
05-13 56° 81° 2183 1339 647 296 151
05-14 58° 71° 2225 1372 670 310 160
05-15 52° 74° 2266 1402 690 323 168
05-16 49° 77° 2307 1434 712 336 176
05-17 60° 75° 2353 1469 737 354 189
05-18 60° 79° 2401 1507 765 373 203
05-19 56° 87° 2451 1547 795 395 220
05-20 59° 86° 2501 1587 825 418 238
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 63° 87° 2554 1630 858 443 258
05-22 68° 85° 2609 1675 893 470 280
05-23 56° 80° 2655 1711 919 488 293
05-24 51° 80° 2699 1745 943 504 304
05-25 62° 79° 2748 1784 972 524 319
05-26 53° 79° 2792 1818 996 540 330
05-27 59° 66° 2833 1849 1017 553 338
05-28 56° 70° 2873 1879 1037 566 346
05-29 51° 66° 2910 1906 1054 575 350
05-30 43° 70° 2945 1931 1069 581 351
05-31 45° 77° 2984 1960 1088 592 357
06-01 51° 77° 3026 1992 1110 607 367
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 62° 73° 3072 2028 1136 624 379
06-03 53° 78° 3115 2061 1159 640 390
06-04 59° 84° 3165 2101 1189 662 406
06-05 68° 82° 3218 2144 1222 687 427
06-06 60° 77° 3265 2181 1249 705 440
06-07 58° 68° 3306 2212 1270 719 448
06-08 51° 76° 3347 2244 1292 732 457
06-09 54° 73° 3389 2275 1313 746 465
06-10 51° 68° 3427 2303 1331 755 470
06-11 45° 73° 3464 2330 1348 764 474
06-12 59° 85° 3513 2369 1377 786 491
06-13 69° 90° 3571 2417 1415 816 515
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 64° 81° 3621 2458 1446 838 533
06-15 52° 78° 3665 2491 1469 853 543
06-16 55° 86° 3713 2529 1497 874 559
06-17 69° 92° 3772 2578 1536 904 584
06-18 74° 90° 3832 2628 1576 936 611
06-19 75° 90° 3892 2679 1617 969 639
06-20 72° 87° 3950 2726 1654 999 664
06-21 66° 87° 4005 2771 1689 1025 685
06-22 69° 90° 4062 2818 1726 1055 710
06-23 68° 80° 4114 2860 1758 1079 729
06-24 63° 81° 4164 2900 1788 1101 745
06-25 67° 82° 4216 2943 1821 1125 765
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 68° 79° 4268 2984 1852 1149 783
06-27 58° 73° 4312 3018 1876 1164 794
06-28 56° 72° 4354 3050 1898 1178 803
06-29 66° 87° 4408 3095 1933 1205 825
06-30 59° 80° 4454 3130 1958 1222 837
07-01 49° 75° 4494 3160 1978 1234 844
07-02 54° 79° 4538 3194 2002 1251 856
07-03 68° 85° 4592 3238 2036 1277 877
07-04 63° 83° 4643 3279 2067 1300 895
07-05 64° 79° 4693 3319 2097 1322 912
07-06 63° 79° 4742 3358 2126 1343 927
07-07 57° 84° 4790 3396 2154 1363 943
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 66° 88° 4845 3441 2189 1390 965
07-09 69° 82° 4899 3485 2223 1416 986
07-10 63° 72° 4945 3521 2249 1433 998
07-11 63° 81° 4995 3561 2279 1455 1015
07-12 65° 82° 5046 3603 2311 1479 1034
07-13 64° 87° 5100 3646 2344 1505 1054
07-14 70° 85° 5155 3691 2379 1532 1077
07-15 71° 86° 5211 3738 2416 1560 1100
07-16 69° 86° 5267 3783 2451 1588 1122
07-17 68° 81° 5319 3826 2484 1612 1142
07-18 57° 73° 5363 3859 2507 1628 1152
07-19 54° 79° 5407 3894 2532 1644 1164
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 57° 79° 5454 3930 2558 1662 1177
07-21 61° 83° 5504 3970 2588 1684 1194
07-22 64° 80° 5554 4010 2618 1706 1211
07-23 62° 83° 5604 4050 2648 1729 1229
07-24 65° 77° 5653 4089 2677 1750 1245
07-25 61° 78° 5701 4127 2705 1769 1259
07-26 57° 80° 5747 4163 2731 1788 1273
07-27 55° 84° 5794 4200 2758 1807 1287
07-28 60° 89° 5846 4243 2791 1831 1306
07-29 73° 82° 5902 4288 2826 1858 1328
07-30 69° 83° 5956 4332 2860 1885 1349
07-31 67° 89° 6012 4378 2896 1913 1373
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 68° 89° 6069 4425 2933 1942 1396
08-02 71° 80° 6123 4469 2967 1967 1417
08-03 68° 88° 6179 4515 3003 1995 1440
08-04 64° 89° 6233 4559 3037 2022 1462
08-05 70° 84° 6288 4604 3072 2049 1484
08-06 61° 73° 6333 4639 3097 2065 1495
08-07 59° 78° 6379 4675 3123 2084 1509
08-08 60° 82° 6428 4714 3152 2105 1525
08-09 64° 78° 6477 4753 3181 2126 1541
08-10 55° 73° 6519 4785 3203 2140 1549
08-11 56° 75° 6563 4819 3227 2155 1560
08-12 54° 80° 6607 4853 3251 2172 1572
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 56° 82° 6654 4891 3279 2191 1586
08-14 58° 83° 6703 4929 3307 2212 1602
08-15 58° 81° 6751 4967 3335 2231 1616
08-16 65° 79° 6801 5007 3365 2253 1633
08-17 67° 77° 6851 5047 3395 2275 1650
08-18 66° 77° 6900 5086 3424 2297 1667
08-19 57° 70° 6942 5118 3446 2310 1675
08-20 53° 71° 6982 5148 3466 2322 1682
08-21 48° 73° 7020 5176 3484 2333 1688
08-22 48° 77° 7061 5207 3505 2346 1696
08-23 52° 79° 7104 5240 3528 2361 1706
08-24 56° 84° 7153 5279 3557 2381 1721
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 65° 88° 7207 5323 3591 2408 1743
08-26 68° 93° 7265 5371 3629 2438 1768
08-27 70° 95° 7326 5422 3670 2470 1795
08-28 70° 81° 7379 5466 3704 2496 1816
08-29 66° 78° 7429 5506 3734 2518 1833
08-30 66° 89° 7485 5551 3769 2546 1856
08-31 67° 82° 7537 5594 3802 2570 1875
09-01 61° 77° 7584 5630 3828 2589 1889
09-02 50° 70° 7622 5658 3846 2599 1894
09-03 47° 74° 7660 5687 3865 2609 1899
09-04 50° 78° 7703 5719 3887 2623 1908
09-05 53° 83° 7749 5755 3913 2641 1921
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 57° 68° 7789 5785 3933 2654 1929
09-07 47° 60° 7821 5807 3945 2657 1929
09-08 41° 70° 7854 5830 3958 2663 1929
09-09 53° 78° 7898 5864 3982 2678 1939
09-10 51° 80° 7942 5898 4006 2694 1950
09-11 57° 85° 7990 5936 4034 2715 1966
09-12 56° 84° 8038 5975 4063 2735 1981
09-13 59° 82° 8087 6013 4091 2755 1996
09-14 58° 81° 8134 6051 4119 2775 2011
09-15 59° 84° 8184 6090 4148 2797 2028
09-16 55° 81° 8230 6126 4174 2815 2041
09-17 53° 79° 8274 6160 4198 2831 2052
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 57° 81° 8321 6198 4226 2850 2066
09-19 56° 82° 8368 6234 4252 2869 2080
09-20 57° 84° 8417 6273 4281 2889 2095
09-21 60° 85° 8467 6313 4311 2912 2113
09-22 57° 82° 8515 6351 4339 2932 2128
09-23 59° 67° 8556 6382 4360 2944 2136
09-24 59° 68° 8597 6413 4381 2958 2144
09-25 62° 75° 8644 6450 4408 2977 2158
09-26 57° 71° 8686 6482 4430 2991 2167
09-27 59° 73° 8730 6516 4454 3007 2178
09-28 64° 68° 8774 6550 4478 3023 2189
09-29 65° 69° 8819 6586 4504 3040 2201
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 60° 72° 8864 6620 4528 3056 2212

 

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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