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Japanese Beetle Adults Emerge, Breed and Feed (GDD 50)
through Sat, Dec. 6. 2025

 
  

Essexville, 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° 29° 2 0 0 0 0
02-16 20° 29° 5 0 0 0 0
02-17 6° 18° 5 0 0 0 0
02-18 -3° 16° 5 0 0 0 0
02-19 13° 19° 5 0 0 0 0
02-20 14° 25° 5 0 0 0 0
02-21 23° 31° 10 0 0 0 0
02-22 21° 30° 14 0 0 0 0
02-23 26° 34° 22 0 0 0 0
02-24 28° 48° 38 6 0 0 0
02-25 27° 46° 53 11 0 0 0
02-26 21° 41° 61 11 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 40° 76 16 0 0 0
02-28 24° 47° 90 19 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 15° 28° 90 19 0 0 0
03-02 18° 28° 91 19 0 0 0
03-03 21° 38° 98 19 0 0 0
03-04 32° 43° 114 25 0 0 0
03-05 35° 51° 135 36 1 0 0
03-06 25° 34° 142 36 1 0 0
03-07 26° 39° 153 37 1 0 0
03-08 20° 36° 159 37 1 0 0
03-09 27° 50° 175 43 1 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 29° 58° 197 55 3 0 0
03-11 30° 48° 214 62 3 0 0
03-12 27° 39° 225 63 3 0 0
03-13 26° 50° 241 69 3 0 0
03-14 34° 67° 269 88 12 1 0
03-15 55° 69° 309 118 32 13 7
03-16 30° 59° 332 130 34 13 7
03-17 26° 44° 345 133 34 13 7
03-18 39° 57° 371 149 40 13 7
03-19 40° 51° 395 163 44 13 7
03-20 31° 45° 410 168 44 13 7
03-21 27° 54° 429 177 44 13 7
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 25° 49° 443 182 44 13 7
03-23 21° 43° 454 182 44 13 7
03-24 34° 39° 468 186 44 13 7
03-25 31° 38° 480 188 44 13 7
03-26 28° 43° 494 192 44 13 7
03-27 26° 55° 512 200 44 13 7
03-28 37° 46° 532 210 44 13 7
03-29 32° 38° 544 213 44 13 7
03-30 36° 43° 562 220 44 13 7
03-31 30° 45° 577 225 44 13 7
04-01 25° 36° 586 225 44 13 7
04-02 32° 46° 603 232 44 13 7
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 40° 57° 629 249 51 13 7
04-04 33° 44° 646 256 51 13 7
04-05 36° 51° 668 267 52 13 7
04-06 31° 45° 684 274 52 13 7
04-07 27° 39° 695 274 52 13 7
04-08 25° 36° 704 274 52 13 7
04-09 24° 44° 716 277 52 13 7
04-10 34° 40° 731 281 52 13 7
04-11 29° 46° 746 287 52 13 7
04-12 28° 51° 764 295 52 13 7
04-13 42° 58° 792 313 60 13 7
04-14 44° 64° 824 335 72 17 7
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 38° 48° 845 346 73 17 7
04-16 35° 50° 865 356 74 17 7
04-17 29° 59° 888 368 76 17 7
04-18 50° 67° 924 395 92 25 10
04-19 42° 63° 954 415 103 27 10
04-20 35° 47° 974 424 103 27 10
04-21 43° 64° 1005 446 114 31 10
04-22 40° 61° 1034 465 123 32 10
04-23 43° 55° 1060 481 130 32 10
04-24 44° 69° 1095 506 144 38 12
04-25 45° 58° 1124 525 153 39 12
04-26 42° 51° 1149 540 158 39 12
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 35° 59° 1174 555 163 39 12
04-28 47° 71° 1211 582 180 48 16
04-29 43° 76° 1248 609 197 58 20
04-30 34° 50° 1268 619 198 58 20
05-01 42° 61° 1298 639 207 59 20
05-02 45° 53° 1325 655 214 59 20
05-03 42° 47° 1347 668 216 59 20
05-04 38° 52° 1370 681 219 59 20
05-05 46° 52° 1397 698 227 59 20
05-06 48° 56° 1427 718 236 61 20
05-07 45° 58° 1457 738 246 63 20
05-08 39° 45° 1477 748 246 63 20
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 35° 63° 1504 764 253 63 20
05-10 47° 64° 1537 788 266 68 20
05-11 42° 57° 1564 805 274 68 20
05-12 44° 70° 1600 830 289 75 22
05-13 57° 66° 1639 860 308 86 29
05-14 58° 67° 1680 890 329 99 36
05-15 53° 74° 1721 922 350 112 45
05-16 58° 77° 1766 957 376 130 57
05-17 53° 66° 1804 985 393 139 62
05-18 47° 54° 1832 1003 402 140 62
05-19 43° 49° 1857 1017 406 140 62
05-20 40° 51° 1880 1031 409 140 62
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 47° 48° 1905 1046 415 140 62
05-22 48° 52° 1933 1064 423 140 62
05-23 42° 54° 1959 1080 428 140 62
05-24 44° 58° 1988 1099 437 141 62
05-25 42° 62° 2018 1119 447 143 62
05-26 44° 62° 2049 1140 458 146 62
05-27 45° 64° 2081 1162 471 150 62
05-28 50° 61° 2115 1186 484 156 62
05-29 53° 67° 2153 1214 502 166 67
05-30 53° 71° 2193 1244 522 178 74
05-31 48° 62° 2226 1267 536 183 75
06-01 42° 66° 2258 1289 548 187 75
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 43° 76° 2296 1316 565 197 79
06-03 57° 82° 2343 1354 592 216 93
06-04 55° 76° 2387 1387 616 232 104
06-05 54° 66° 2425 1416 634 242 109
06-06 50° 67° 2461 1442 651 250 113
06-07 52° 67° 2499 1470 668 260 117
06-08 55° 71° 2539 1500 689 272 125
06-09 57° 73° 2582 1533 712 287 135
06-10 54° 65° 2620 1561 729 297 139
06-11 53° 81° 2665 1596 754 314 151
06-12 58° 66° 2705 1626 774 326 158
06-13 56° 61° 2741 1652 790 334 161
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 56° 63° 2779 1679 808 344 166
06-15 57° 66° 2818 1709 828 355 173
06-16 55° 75° 2861 1742 851 370 183
06-17 64° 84° 2913 1784 883 394 202
06-18 60° 68° 2955 1816 905 408 211
06-19 56° 72° 2998 1848 927 423 220
06-20 57° 72° 3040 1881 949 437 229
06-21 66° 87° 3094 1925 984 463 251
06-22 76° 89° 3155 1976 1025 496 278
06-23 75° 90° 3216 2027 1065 529 306
06-24 67° 85° 3270 2071 1099 555 327
06-25 63° 70° 3315 2105 1124 572 339
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 62° 66° 3357 2138 1146 586 348
06-27 64° 85° 3409 2180 1179 610 367
06-28 65° 77° 3459 2219 1208 632 384
06-29 60° 82° 3507 2258 1237 652 400
06-30 70° 79° 3560 2301 1269 677 419
07-01 67° 78° 3610 2341 1300 699 437
07-02 63° 82° 3661 2382 1330 722 454
07-03 64° 74° 3708 2419 1357 741 468
07-04 57° 80° 3754 2455 1384 759 482
07-05 69° 87° 3811 2501 1420 788 505
07-06 66° 83° 3863 2544 1452 812 524
07-07 62° 69° 3906 2577 1475 827 534
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 58° 76° 3951 2612 1500 844 546
07-09 66° 78° 4001 2652 1531 866 563
07-10 64° 75° 4049 2690 1558 886 578
07-11 65° 75° 4097 2727 1586 906 593
07-12 68° 82° 4150 2770 1619 931 613
07-13 67° 80° 4201 2812 1650 954 631
07-14 60° 82° 4250 2851 1679 975 647
07-15 64° 83° 4301 2892 1711 998 666
07-16 67° 83° 4354 2935 1744 1023 686
07-17 60° 73° 4399 2970 1768 1040 697
07-18 52° 74° 4440 3001 1789 1053 705
07-19 62° 77° 4487 3038 1817 1072 720
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 66° 76° 4536 3077 1846 1093 735
07-21 60° 71° 4580 3111 1869 1109 746
07-22 53° 77° 4623 3144 1892 1124 756
07-23 62° 85° 4674 3185 1924 1147 775
07-24 73° 89° 4734 3234 1963 1179 801
07-25 70° 77° 4785 3276 1994 1202 819
07-26 66° 78° 4835 3316 2025 1224 837
07-27 70° 86° 4891 3362 2061 1252 859
07-28 70° 86° 4947 3408 2096 1280 882
07-29 68° 82° 5000 3451 2130 1305 902
07-30 65° 75° 5048 3489 2157 1325 917
07-31 64° 73° 5095 3525 2184 1344 931
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 57° 74° 5138 3559 2208 1359 942
08-02 54° 77° 5181 3592 2231 1374 952
08-03 57° 78° 5227 3628 2257 1392 964
08-04 58° 77° 5273 3664 2282 1410 977
08-05 64° 75° 5321 3701 2310 1430 992
08-06 65° 81° 5372 3743 2341 1453 1010
08-07 64° 83° 5423 3784 2373 1476 1029
08-08 69° 85° 5479 3830 2408 1504 1051
08-09 74° 87° 5537 3878 2446 1534 1076
08-10 73° 89° 5596 3927 2485 1565 1102
08-11 73° 86° 5653 3974 2522 1594 1126
08-12 68° 80° 5705 4016 2555 1618 1145
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 68° 80° 5757 4058 2587 1642 1164
08-14 66° 78° 5807 4098 2617 1664 1181
08-15 66° 84° 5860 4141 2649 1689 1201
08-16 69° 85° 5915 4186 2684 1716 1223
08-17 63° 75° 5962 4223 2711 1735 1237
08-18 59° 75° 6007 4258 2737 1752 1249
08-19 62° 71° 6052 4293 2761 1769 1261
08-20 64° 71° 6097 4328 2787 1786 1274
08-21 64° 74° 6144 4365 2814 1805 1288
08-22 56° 79° 6190 4401 2839 1823 1300
08-23 65° 78° 6240 4441 2869 1845 1317
08-24 56° 72° 6282 4473 2891 1859 1326
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 55° 68° 6321 4502 2911 1870 1333
08-26 49° 69° 6358 4529 2927 1879 1336
08-27 46° 75° 6397 4557 2946 1890 1342
08-28 58° 70° 6439 4590 2968 1904 1351
08-29 50° 65° 6474 4615 2984 1911 1353
08-30 47° 70° 6511 4642 3000 1920 1357
08-31 49° 72° 6549 4670 3018 1930 1362
09-01 51° 73° 6589 4700 3038 1942 1369
09-02 51° 75° 6630 4731 3060 1955 1378
09-03 56° 74° 6673 4764 3083 1970 1388
09-04 49° 64° 6708 4788 3097 1977 1389
09-05 51° 65° 6744 4815 3113 1985 1392
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 50° 62° 6777 4838 3127 1990 1393
09-07 45° 65° 6810 4861 3140 1995 1393
09-08 41° 66° 6842 4883 3151 1999 1393
09-09 47° 72° 6880 4910 3169 2009 1397
09-10 50° 73° 6919 4940 3189 2020 1404
09-11 53° 70° 6959 4970 3208 2032 1411
09-12 52° 74° 7000 5001 3229 2045 1419
09-13 58° 75° 7045 5036 3254 2062 1431
09-14 53° 74° 7086 5067 3275 2075 1439
09-15 57° 72° 7128 5099 3298 2089 1448
09-16 54° 73° 7170 5131 3319 2103 1457
09-17 49° 76° 7211 5162 3340 2116 1464
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 58° 81° 7258 5199 3367 2135 1479
09-19 59° 69° 7300 5231 3389 2149 1488
09-20 57° 72° 7343 5264 3412 2164 1497
09-21 58° 69° 7384 5295 3433 2177 1506
09-22 62° 73° 7430 5331 3459 2195 1518
09-23 60° 73° 7474 5365 3484 2211 1530
09-24 63° 67° 7517 5398 3506 2226 1540
09-25 59° 71° 7560 5431 3530 2241 1550
09-26 52° 75° 7602 5463 3551 2255 1559
09-27 59° 78° 7649 5500 3578 2274 1572
09-28 55° 70° 7689 5530 3599 2286 1580
09-29 48° 74° 7728 5559 3618 2297 1586
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 53° 68° 7767 5588 3636 2308 1592
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 31° 37° 12 2 0 0 0
02-16 25° 30° 17 2 0 0 0
02-17 19° 26° 18 2 0 0 0
02-18 24° 35° 25 2 0 0 0
02-19 17° 37° 31 2 0 0 0
02-20 21° 45° 42 3 0 0 0
02-21 36° 54° 65 16 3 0 0
02-22 29° 45° 80 21 3 0 0
02-23 21° 37° 88 21 3 0 0
02-24 18° 30° 89 21 3 0 0
02-25 27° 46° 104 26 3 0 0
02-26 29° 49° 121 33 3 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 45° 68° 155 57 18 7 2
02-28 23° 57° 174 66 18 7 2
02-29 21° 33° 179 66 18 7 2
03-01 29° 49° 196 73 18 7 2
03-02 40° 52° 219 86 21 7 2
03-03 36° 56° 243 100 25 7 2
03-04 45° 66° 277 124 39 12 2
03-05 40° 61° 306 142 48 13 2
03-06 36° 41° 322 149 48 13 2
03-07 36° 43° 340 157 48 13 2
03-08 35° 45° 358 165 48 13 2
03-09 32° 43° 374 171 48 13 2
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 29° 38° 385 172 48 13 2
03-11 28° 53° 404 181 48 13 2
03-12 36° 65° 433 199 56 13 2
03-13 39° 59° 460 217 63 13 2
03-14 39° 44° 479 226 63 13 2
03-15 34° 44° 496 233 63 13 2
03-16 32° 49° 515 242 63 13 2
03-17 29° 38° 527 244 63 13 2
03-18 27° 34° 535 244 63 13 2
03-19 31° 40° 549 247 63 13 2
03-20 24° 36° 557 247 63 13 2
03-21 23° 34° 564 247 63 13 2
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 26° 30° 570 247 63 13 2
03-23 25° 34° 577 247 63 13 2
03-24 22° 36° 584 247 63 13 2
03-25 33° 59° 608 261 67 13 2
03-26 41° 57° 634 278 74 13 2
03-27 33° 42° 649 283 74 13 2
03-28 28° 44° 663 287 74 13 2
03-29 27° 47° 678 292 74 13 2
03-30 32° 39° 692 295 74 13 2
03-31 34° 40° 707 300 74 13 2
04-01 32° 43° 723 306 74 13 2
04-02 36° 42° 740 313 74 13 2
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 38° 45° 759 322 74 13 2
04-04 36° 39° 774 328 74 13 2
04-05 33° 46° 792 335 74 13 2
04-06 37° 49° 813 346 75 13 2
04-07 31° 52° 832 355 75 13 2
04-08 44° 68° 866 379 89 19 3
04-09 44° 67° 900 403 102 25 4
04-10 38° 61° 927 420 110 25 4
04-11 41° 52° 951 435 114 25 4
04-12 43° 47° 974 448 117 25 4
04-13 40° 58° 1001 465 124 25 4
04-14 45° 69° 1037 490 139 32 6
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 38° 58° 1063 506 145 32 6
04-16 39° 52° 1086 520 149 32 6
04-17 47° 60° 1118 541 161 36 6
04-18 46° 54° 1146 559 169 36 6
04-19 44° 51° 1172 575 174 36 6
04-20 37° 44° 1190 584 174 36 6
04-21 37° 46° 1210 593 174 36 6
04-22 33° 61° 1235 608 179 36 6
04-23 48° 61° 1268 631 192 41 6
04-24 32° 47° 1285 638 192 41 6
04-25 28° 44° 1299 643 192 41 6
04-26 34° 59° 1323 657 196 41 6
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 51° 75° 1364 688 217 53 14
04-28 46° 68° 1399 713 232 60 16
04-29 43° 65° 1431 734 244 64 16
04-30 47° 57° 1461 754 253 66 16
05-01 44° 72° 1497 780 270 74 19
05-02 46° 56° 1526 800 279 75 19
05-03 50° 64° 1562 825 294 83 21
05-04 46° 56° 1590 844 303 84 21
05-05 50° 64° 1625 869 318 91 23
05-06 45° 57° 1655 888 327 92 23
05-07 39° 63° 1683 907 336 93 23
05-08 50° 62° 1717 931 350 99 24
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 45° 53° 1744 948 357 99 24
05-10 42° 61° 1774 967 366 100 24
05-11 47° 52° 1801 984 373 100 24
05-12 39° 68° 1832 1006 385 103 24
05-13 52° 75° 1874 1037 406 117 33
05-14 46° 51° 1901 1054 413 117 33
05-15 48° 55° 1930 1073 423 118 33
05-16 43° 66° 1962 1095 435 122 33
05-17 57° 68° 2003 1126 455 135 40
05-18 53° 72° 2043 1157 476 147 48
05-19 58° 76° 2088 1192 501 164 60
05-20 52° 71° 2128 1221 521 176 67
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 60° 67° 2170 1253 542 190 75
05-22 62° 75° 2216 1289 569 208 89
05-23 54° 72° 2257 1321 590 221 97
05-24 51° 66° 2294 1347 606 230 100
05-25 55° 71° 2335 1378 628 243 108
05-26 52° 71° 2374 1408 647 254 115
05-27 57° 61° 2411 1434 664 263 118
05-28 55° 68° 2451 1464 683 275 125
05-29 50° 59° 2483 1486 696 279 125
05-30 44° 63° 2515 1508 707 283 125
05-31 45° 73° 2552 1535 724 292 129
06-01 51° 73° 2592 1565 744 304 136
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 56° 65° 2631 1594 763 315 142
06-03 53° 68° 2669 1622 782 325 148
06-04 61° 80° 2718 1661 810 346 163
06-05 63° 78° 2766 1699 839 366 179
06-06 60° 71° 2810 1733 863 382 189
06-07 57° 65° 2849 1762 881 393 195
06-08 53° 69° 2888 1791 900 404 201
06-09 52° 66° 2925 1818 917 413 205
06-10 50° 64° 2960 1843 932 420 207
06-11 45° 68° 2995 1868 947 427 209
06-12 60° 80° 3043 1906 975 447 224
06-13 68° 83° 3096 1949 1009 472 245
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 58° 69° 3138 1981 1030 486 253
06-15 55° 66° 3176 2009 1049 496 258
06-16 59° 82° 3225 2048 1077 517 274
06-17 69° 87° 3281 2094 1113 545 297
06-18 73° 87° 3338 2141 1151 574 322
06-19 75° 89° 3398 2192 1191 606 349
06-20 64° 72° 3445 2228 1217 625 362
06-21 64° 79° 3494 2267 1246 646 378
06-22 67° 76° 3544 2307 1276 668 395
06-23 67° 74° 3593 2346 1305 689 411
06-24 61° 76° 3639 2383 1332 707 425
06-25 64° 79° 3689 2422 1361 729 441
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 63° 77° 3737 2460 1389 749 456
06-27 56° 69° 3777 2491 1410 761 464
06-28 55° 69° 3818 2521 1430 774 471
06-29 67° 81° 3869 2562 1462 797 490
06-30 55° 72° 3911 2594 1483 811 498
07-01 51° 72° 3950 2624 1503 822 505
07-02 56° 73° 3993 2656 1525 837 514
07-03 66° 81° 4045 2698 1557 861 533
07-04 65° 79° 4095 2738 1587 883 550
07-05 64° 77° 4144 2777 1616 904 566
07-06 63° 75° 4191 2814 1643 923 580
07-07 62° 78° 4238 2852 1671 942 595
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 69° 79° 4290 2893 1703 966 614
07-09 69° 80° 4343 2936 1735 991 633
07-10 67° 72° 4390 2973 1762 1010 647
07-11 64° 77° 4439 3012 1791 1031 663
07-12 63° 79° 4487 3050 1820 1051 679
07-13 64° 84° 4539 3093 1852 1075 698
07-14 72° 83° 4595 3138 1887 1103 720
07-15 69° 84° 4649 3183 1922 1129 742
07-16 70° 79° 4702 3225 1955 1154 761
07-17 65° 76° 4751 3264 1983 1175 777
07-18 59° 73° 4795 3298 2008 1191 789
07-19 56° 78° 4840 3334 2033 1208 801
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 59° 81° 4889 3372 2061 1229 816
07-21 65° 76° 4937 3410 2090 1249 832
07-22 64° 78° 4986 3449 2119 1270 848
07-23 64° 81° 5037 3490 2149 1293 865
07-24 66° 75° 5085 3529 2178 1313 881
07-25 60° 76° 5132 3565 2204 1332 894
07-26 58° 77° 5178 3601 2230 1350 907
07-27 58° 80° 5225 3638 2257 1369 921
07-28 61° 83° 5275 3678 2287 1391 938
07-29 73° 82° 5330 3723 2323 1418 961
07-30 71° 82° 5385 3768 2357 1445 982
07-31 67° 85° 5439 3812 2392 1471 1003
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 70° 83° 5493 3857 2426 1497 1025
08-02 73° 82° 5549 3902 2461 1525 1047
08-03 68° 84° 5603 3946 2495 1551 1068
08-04 66° 83° 5655 3988 2528 1575 1087
08-05 69° 76° 5706 4029 2558 1598 1105
08-06 64° 74° 5753 4066 2585 1617 1119
08-07 61° 76° 5799 4102 2612 1635 1132
08-08 60° 79° 5847 4140 2639 1655 1147
08-09 64° 76° 5895 4178 2667 1675 1162
08-10 57° 69° 5936 4210 2689 1688 1171
08-11 61° 75° 5982 4245 2714 1706 1183
08-12 54° 78° 6026 4279 2738 1722 1194
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 58° 78° 6072 4315 2764 1740 1207
08-14 58° 79° 6118 4352 2791 1758 1221
08-15 59° 80° 6166 4389 2818 1778 1235
08-16 66° 76° 6215 4428 2847 1799 1251
08-17 69° 75° 6265 4468 2878 1821 1269
08-18 69° 74° 6315 4508 2907 1843 1285
08-19 59° 67° 6356 4539 2928 1856 1293
08-20 56° 69° 6397 4570 2949 1869 1301
08-21 54° 72° 6438 4601 2970 1882 1309
08-22 51° 75° 6479 4632 2992 1895 1318
08-23 54° 77° 6523 4666 3015 1911 1328
08-24 58° 79° 6570 4703 3042 1930 1342
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 62° 80° 6619 4742 3071 1951 1358
08-26 67° 88° 6674 4787 3107 1978 1381
08-27 71° 88° 6731 4835 3144 2007 1405
08-28 65° 73° 6778 4872 3171 2026 1419
08-29 64° 74° 6826 4909 3198 2046 1433
08-30 67° 80° 6877 4951 3230 2069 1452
08-31 62° 80° 6927 4990 3259 2091 1468
09-01 62° 74° 6973 5026 3285 2109 1481
09-02 53° 69° 7012 5055 3305 2120 1488
09-03 47° 75° 7051 5085 3324 2131 1494
09-04 50° 77° 7093 5116 3346 2145 1503
09-05 54° 82° 7139 5153 3372 2163 1516
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 54° 69° 7179 5182 3391 2175 1522
09-07 51° 62° 7214 5207 3406 2182 1524
09-08 45° 71° 7250 5233 3422 2190 1527
09-09 59° 77° 7295 5269 3448 2207 1540
09-10 52° 76° 7337 5301 3470 2221 1549
09-11 57° 80° 7384 5337 3497 2240 1563
09-12 55° 79° 7429 5372 3522 2257 1575
09-13 57° 77° 7474 5407 3547 2274 1587
09-14 57° 78° 7520 5443 3572 2292 1599
09-15 60° 80° 7568 5481 3600 2312 1614
09-16 57° 80° 7614 5517 3626 2330 1627
09-17 56° 77° 7658 5551 3650 2346 1638
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 56° 76° 7702 5585 3675 2362 1650
09-19 55° 76° 7746 5619 3699 2378 1660
09-20 61° 81° 7795 5658 3727 2399 1676
09-21 60° 80° 7843 5696 3756 2419 1692
09-22 60° 73° 7888 5731 3781 2436 1704
09-23 58° 65° 7928 5761 3800 2448 1710
09-24 60° 69° 7970 5794 3823 2462 1720
09-25 61° 72° 8015 5828 3848 2479 1732
09-26 53° 70° 8055 5858 3868 2491 1739
09-27 52° 73° 8096 5889 3889 2504 1746
09-28 65° 72° 8143 5926 3915 2523 1760
09-29 64° 73° 8189 5962 3941 2541 1773
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 61° 73° 8234 5997 3966 2558 1785

 

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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