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Japanese Beetle Adults Emerge, Breed and Feed (GDD 50)
through Sun, Dec. 14. 2025

 
  

Lafayette, IN

        

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 29° 37° 11 1 0 0 0
02-16 17° 31° 13 1 0 0 0
02-17 7° 16° 13 1 0 0 0
02-18 3° 17° 13 1 0 0 0
02-19 10° 19° 13 1 0 0 0
02-20 4° 24° 13 1 0 0 0
02-21 11° 32° 13 1 0 0 0
02-22 13° 39° 17 1 0 0 0
02-23 21° 47° 29 3 0 0 0
02-24 34° 54° 51 15 2 0 0
02-25 34° 58° 76 30 7 0 0
02-26 28° 52° 93 37 7 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 52° 114 48 7 0 0
02-28 30° 63° 139 63 12 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 19° 39° 146 63 12 0 0
03-02 14° 36° 149 63 12 0 0
03-03 27° 46° 163 67 12 0 0
03-04 42° 55° 190 84 19 0 0
03-05 32° 53° 211 94 19 0 0
03-06 30° 40° 224 97 19 0 0
03-07 30° 41° 237 101 19 0 0
03-08 30° 48° 254 107 19 0 0
03-09 30° 58° 276 120 21 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 34° 68° 305 139 30 1 0
03-11 43° 64° 336 160 41 4 0
03-12 35° 64° 364 177 49 4 0
03-13 35° 73° 396 199 61 8 0
03-14 45° 78° 435 229 80 20 7
03-15 56° 70° 476 260 101 33 15
03-16 32° 55° 498 272 103 33 15
03-17 27° 52° 516 279 103 33 15
03-18 43° 73° 552 305 119 41 18
03-19 50° 68° 588 332 136 49 21
03-20 32° 48° 606 339 136 49 21
03-21 28° 56° 626 350 136 49 21
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 37° 50° 648 361 138 49 21
03-23 33° 47° 666 369 138 49 21
03-24 34° 52° 687 380 139 49 21
03-25 34° 49° 706 390 139 49 21
03-26 28° 55° 725 399 139 49 21
03-27 38° 56° 750 414 144 49 21
03-28 47° 80° 792 445 165 63 30
03-29 59° 66° 832 476 186 75 37
03-30 54° 72° 874 507 207 89 46
03-31 34° 49° 893 517 207 89 46
04-01 29° 49° 910 524 207 89 46
04-02 43° 78° 949 552 226 99 51
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 48° 64° 983 576 240 105 52
04-04 41° 53° 1007 591 244 105 52
04-05 43° 56° 1035 608 252 105 52
04-06 39° 47° 1055 619 252 105 52
04-07 30° 52° 1074 627 252 105 52
04-08 23° 45° 1086 629 252 105 52
04-09 30° 46° 1102 635 252 105 52
04-10 35° 53° 1124 647 254 105 52
04-11 37° 51° 1146 660 257 105 52
04-12 29° 58° 1168 671 258 105 52
04-13 46° 64° 1200 694 271 110 52
04-14 53° 68° 1239 722 289 120 57
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 43° 55° 1266 739 296 120 57
04-16 34° 55° 1289 752 299 120 57
04-17 39° 66° 1320 773 310 123 57
04-18 53° 79° 1364 807 334 139 68
04-19 51° 70° 1402 835 352 149 74
04-20 48° 69° 1439 862 369 158 78
04-21 49° 67° 1475 888 385 166 81
04-22 40° 72° 1509 912 399 172 81
04-23 50° 78° 1551 944 421 186 90
04-24 50° 82° 1595 978 445 202 101
04-25 46° 68° 1630 1003 460 209 104
04-26 43° 59° 1659 1022 469 210 104
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 36° 68° 1688 1042 479 212 104
04-28 51° 81° 1732 1076 503 228 115
04-29 57° 80° 1779 1112 529 246 128
04-30 47° 64° 1812 1136 543 252 129
05-01 59° 72° 1856 1169 566 267 139
05-02 56° 70° 1897 1200 587 280 147
05-03 47° 63° 1930 1223 600 285 147
05-04 45° 49° 1955 1238 605 285 147
05-05 49° 63° 1989 1262 619 291 148
05-06 48° 73° 2027 1290 637 302 153
05-07 50° 75° 2068 1321 658 314 161
05-08 50° 69° 2105 1349 676 324 166
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 41° 68° 2138 1371 689 329 166
05-10 39° 80° 2176 1399 706 338 170
05-11 43° 79° 2215 1428 725 349 177
05-12 52° 78° 2258 1462 749 365 187
05-13 58° 74° 2302 1496 773 381 198
05-14 60° 78° 2350 1533 800 400 212
05-15 63° 89° 2404 1578 835 427 234
05-16 62° 86° 2456 1619 866 451 253
05-17 56° 71° 2497 1651 888 464 261
05-18 49° 72° 2536 1679 906 474 267
05-19 49° 73° 2575 1708 925 486 273
05-20 51° 64° 2610 1734 941 493 275
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 52° 59° 2644 1757 954 498 275
05-22 47° 56° 2673 1776 963 499 275
05-23 41° 65° 2704 1798 975 503 275
05-24 44° 70° 2739 1822 990 510 277
05-25 52° 64° 2775 1848 1006 518 280
05-26 46° 71° 2811 1875 1022 526 284
05-27 56° 70° 2852 1906 1043 539 292
05-28 57° 66° 2892 1935 1063 551 298
05-29 51° 69° 2930 1963 1081 561 303
05-30 56° 75° 2974 1997 1104 576 314
05-31 50° 71° 3012 2026 1123 587 320
06-01 41° 73° 3048 2051 1138 594 322
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 47° 81° 3090 2083 1160 608 331
06-03 61° 87° 3141 2125 1192 632 350
06-04 65° 78° 3191 2164 1221 653 366
06-05 61° 72° 3235 2199 1246 670 377
06-06 63° 77° 3283 2237 1274 690 392
06-07 57° 78° 3329 2272 1299 707 405
06-08 61° 80° 3377 2311 1328 728 420
06-09 57° 76° 3422 2345 1352 745 432
06-10 51° 77° 3464 2377 1374 759 441
06-11 56° 86° 3513 2416 1403 780 457
06-12 62° 84° 3564 2458 1435 803 475
06-13 68° 74° 3613 2497 1464 824 491
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 62° 71° 3658 2531 1488 841 503
06-15 64° 80° 3708 2572 1519 863 520
06-16 64° 83° 3760 2613 1550 886 539
06-17 66° 86° 3814 2657 1584 912 560
06-18 67° 86° 3868 2701 1618 939 581
06-19 66° 81° 3919 2743 1650 962 599
06-20 65° 82° 3971 2784 1681 985 618
06-21 71° 92° 4030 2834 1721 1017 644
06-22 75° 92° 4092 2885 1762 1050 673
06-23 73° 92° 4152 2936 1803 1083 700
06-24 75° 91° 4213 2987 1844 1116 728
06-25 73° 91° 4273 3037 1884 1148 755
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 71° 92° 4333 3087 1924 1180 782
06-27 74° 89° 4393 3136 1963 1212 809
06-28 71° 88° 4450 3184 2001 1241 833
06-29 69° 88° 4507 3231 2038 1270 857
06-30 72° 87° 4565 3278 2076 1300 882
07-01 71° 84° 4620 3324 2111 1327 905
07-02 63° 85° 4672 3366 2143 1351 923
07-03 65° 88° 4727 3410 2178 1378 945
07-04 66° 89° 4783 3456 2213 1405 968
07-05 68° 91° 4840 3504 2251 1435 992
07-06 72° 89° 4899 3552 2289 1465 1018
07-07 66° 81° 4950 3594 2321 1489 1037
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 59° 86° 5001 3635 2352 1512 1054
07-09 71° 83° 5056 3680 2387 1539 1076
07-10 65° 87° 5110 3724 2421 1565 1097
07-11 72° 90° 5169 3773 2460 1596 1123
07-12 74° 85° 5227 3820 2497 1625 1148
07-13 67° 84° 5281 3864 2531 1651 1169
07-14 65° 85° 5333 3907 2564 1676 1189
07-15 68° 89° 5390 3953 2600 1704 1212
07-16 71° 88° 5447 4001 2638 1734 1236
07-17 69° 83° 5501 4045 2672 1760 1257
07-18 64° 81° 5552 4085 2702 1782 1275
07-19 67° 82° 5604 4127 2735 1807 1294
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 69° 81° 5657 4171 2768 1832 1314
07-21 69° 82° 5711 4214 2802 1858 1335
07-22 65° 84° 5764 4257 2834 1882 1355
07-23 65° 90° 5819 4302 2870 1910 1377
07-24 74° 93° 5880 4354 2911 1943 1406
07-25 73° 89° 5940 4403 2950 1974 1432
07-26 71° 91° 5999 4452 2989 2005 1458
07-27 75° 88° 6058 4502 3029 2037 1484
07-28 73° 88° 6117 4550 3068 2068 1510
07-29 70° 91° 6176 4599 3106 2098 1536
07-30 70° 88° 6233 4646 3143 2127 1560
07-31 63° 72° 6278 4682 3169 2145 1572
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 58° 77° 6324 4717 3194 2162 1585
08-02 56° 76° 6368 4751 3218 2178 1596
08-03 53° 77° 6411 4785 3242 2194 1606
08-04 62° 81° 6461 4824 3271 2215 1623
08-05 61° 82° 6510 4863 3301 2237 1639
08-06 62° 86° 6562 4905 3332 2261 1658
08-07 66° 87° 6617 4950 3367 2287 1680
08-08 68° 89° 6673 4996 3403 2316 1703
08-09 68° 90° 6730 5043 3440 2344 1727
08-10 69° 89° 6787 5090 3477 2373 1751
08-11 70° 88° 6844 5137 3514 2402 1775
08-12 69° 88° 6900 5184 3551 2431 1799
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 68° 86° 6955 5229 3586 2458 1820
08-14 61° 85° 7006 5270 3617 2481 1839
08-15 65° 90° 7062 5315 3653 2509 1861
08-16 71° 92° 7122 5365 3692 2540 1888
08-17 68° 87° 7177 5411 3728 2568 1910
08-18 68° 84° 7231 5455 3762 2594 1931
08-19 71° 83° 7286 5500 3797 2621 1953
08-20 66° 77° 7336 5540 3827 2643 1970
08-21 65° 77° 7385 5578 3856 2664 1986
08-22 58° 76° 7430 5614 3881 2681 1998
08-23 58° 81° 7477 5651 3908 2700 2012
08-24 58° 74° 7521 5685 3932 2716 2023
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 49° 70° 7559 5712 3949 2725 2028
08-26 48° 72° 7596 5740 3967 2735 2033
08-27 48° 75° 7636 5769 3986 2747 2039
08-28 57° 78° 7681 5805 4012 2764 2051
08-29 50° 74° 7721 5835 4032 2776 2058
08-30 51° 75° 7762 5866 4053 2789 2066
08-31 50° 76° 7803 5897 4074 2802 2074
09-01 49° 79° 7845 5929 4096 2816 2084
09-02 53° 82° 7891 5964 4122 2834 2096
09-03 52° 80° 7935 5999 4146 2850 2107
09-04 48° 67° 7971 6024 4161 2857 2110
09-05 51° 70° 8009 6053 4180 2868 2115
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 46° 68° 8044 6078 4195 2875 2117
09-07 45° 69° 8079 6102 4209 2881 2119
09-08 41° 71° 8113 6126 4224 2888 2120
09-09 44° 76° 8151 6154 4241 2898 2125
09-10 55° 82° 8198 6191 4268 2916 2139
09-11 59° 83° 8246 6230 4297 2937 2154
09-12 53° 85° 8293 6267 4324 2956 2169
09-13 58° 72° 8336 6300 4347 2971 2178
09-14 62° 87° 8389 6342 4379 2995 2198
09-15 58° 87° 8439 6383 4410 3018 2215
09-16 57° 83° 8488 6421 4438 3038 2231
09-17 55° 86° 8536 6459 4466 3058 2246
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 56° 89° 8586 6499 4497 3081 2263
09-19 58° 89° 8637 6541 4528 3104 2282
09-20 60° 86° 8689 6582 4559 3127 2300
09-21 65° 83° 8741 6624 4591 3151 2319
09-22 65° 74° 8788 6662 4619 3171 2333
09-23 61° 80° 8837 6700 4647 3191 2349
09-24 63° 77° 8884 6738 4675 3211 2364
09-25 60° 75° 8930 6773 4701 3229 2376
09-26 52° 81° 8974 6808 4725 3245 2388
09-27 52° 86° 9022 6845 4752 3264 2402
09-28 55° 88° 9071 6885 4782 3286 2418
09-29 58° 89° 9123 6926 4813 3309 2437
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 57° 85° 9172 6965 4842 3330 2453
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 32° 45° 17 7 0 0 0
02-16 21° 31° 21 7 0 0 0
02-17 12° 24° 21 7 0 0 0
02-18 15° 33° 23 7 0 0 0
02-19 17° 44° 31 7 0 0 0
02-20 25° 55° 48 14 0 0 0
02-21 37° 63° 76 32 8 0 0
02-22 40° 55° 102 48 13 0 0
02-23 35° 50° 122 58 14 0 0
02-24 25° 36° 131 58 14 0 0
02-25 27° 56° 150 68 14 0 0
02-26 34° 71° 181 88 25 3 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 55° 67° 220 117 44 14 6
02-28 26° 64° 243 130 47 14 6
02-29 18° 41° 250 130 47 14 6
03-01 28° 44° 264 134 47 14 6
03-02 38° 56° 290 150 52 14 6
03-03 38° 71° 322 172 64 18 6
03-04 53° 74° 363 203 85 31 14
03-05 42° 62° 393 223 95 33 14
03-06 40° 50° 416 236 98 33 14
03-07 42° 48° 439 249 101 33 14
03-08 45° 58° 468 268 110 34 14
03-09 37° 52° 491 280 113 34 14
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 45° 506 286 113 34 14
03-11 26° 61° 528 298 114 34 14
03-12 41° 68° 560 320 127 39 14
03-13 44° 73° 597 347 143 48 18
03-14 48° 71° 635 375 161 58 23
03-15 41° 56° 662 391 168 58 23
03-16 36° 63° 689 409 175 58 23
03-17 33° 42° 705 414 175 58 23
03-18 29° 35° 714 414 175 58 23
03-19 25° 58° 734 424 175 58 23
03-20 29° 47° 750 430 175 58 23
03-21 24° 41° 761 431 175 58 23
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 31° 50° 779 439 175 58 23
03-23 29° 42° 793 443 175 58 23
03-24 29° 51° 811 451 175 58 23
03-25 43° 67° 844 474 188 63 23
03-26 40° 58° 871 491 195 63 23
03-27 32° 42° 886 496 195 63 23
03-28 28° 57° 906 506 195 63 23
03-29 36° 64° 934 524 203 63 23
03-30 46° 71° 971 550 220 71 27
03-31 40° 65° 1001 571 230 74 27
04-01 45° 53° 1029 588 238 74 27
04-02 37° 63° 1057 607 246 74 27
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 35° 40° 1072 612 246 74 27
04-04 35° 40° 1088 618 246 74 27
04-05 35° 46° 1107 627 246 74 27
04-06 29° 54° 1127 637 246 74 27
04-07 38° 58° 1153 653 252 74 27
04-08 43° 73° 1189 679 268 82 30
04-09 51° 70° 1228 707 287 92 35
04-10 46° 65° 1261 731 300 98 35
04-11 49° 54° 1291 751 310 100 35
04-12 47° 60° 1323 773 322 103 35
04-13 40° 68° 1355 795 334 108 35
04-14 57° 81° 1402 832 361 126 49
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 55° 71° 1442 862 381 139 57
04-16 53° 79° 1487 897 406 156 68
04-17 66° 71° 1533 933 432 174 82
04-18 45° 69° 1568 958 447 181 84
04-19 46° 56° 1598 977 457 182 84
04-20 36° 49° 1618 988 457 182 84
04-21 34° 46° 1636 996 457 182 84
04-22 35° 64° 1664 1014 465 182 84
04-23 50° 54° 1694 1034 475 184 84
04-24 38° 50° 1716 1046 477 184 84
04-25 32° 56° 1738 1058 479 184 84
04-26 41° 63° 1768 1078 489 187 84
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 60° 75° 1813 1113 514 204 96
04-28 65° 80° 1864 1154 545 226 113
04-29 60° 69° 1906 1186 567 241 123
04-30 52° 75° 1948 1218 589 254 131
05-01 60° 79° 1995 1255 616 273 146
05-02 53° 84° 2042 1292 643 292 160
05-03 61° 75° 2088 1328 669 310 173
05-04 53° 80° 2133 1363 694 327 185
05-05 55° 67° 2172 1392 713 338 191
05-06 51° 76° 2213 1423 734 351 199
05-07 57° 77° 2258 1458 759 368 211
05-08 56° 78° 2303 1493 784 385 223
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 54° 68° 2342 1522 803 396 229
05-10 47° 66° 2376 1546 817 403 230
05-11 53° 70° 2416 1576 837 414 237
05-12 46° 81° 2457 1607 858 427 245
05-13 55° 78° 2502 1642 883 444 257
05-14 61° 68° 2544 1674 906 459 266
05-15 58° 69° 2586 1706 928 473 275
05-16 51° 74° 2627 1737 948 485 283
05-17 61° 78° 2675 1774 976 505 297
05-18 62° 81° 2724 1814 1005 526 314
05-19 62° 87° 2777 1857 1038 551 333
05-20 64° 86° 2830 1900 1071 576 353
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 64° 87° 2884 1943 1105 602 374
05-22 64° 80° 2934 1984 1135 624 392
05-23 53° 80° 2978 2018 1159 641 403
05-24 61° 82° 3028 2058 1189 662 420
05-25 61° 79° 3076 2096 1217 682 435
05-26 58° 74° 3120 2130 1241 698 445
05-27 58° 72° 3163 2163 1264 713 456
05-28 55° 73° 3205 2195 1286 727 464
05-29 53° 71° 3245 2225 1306 739 472
05-30 46° 75° 3284 2254 1325 750 478
05-31 53° 77° 3327 2287 1348 765 488
06-01 60° 72° 3371 2321 1372 781 499
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 63° 74° 3418 2358 1399 800 513
06-03 58° 84° 3467 2397 1428 821 529
06-04 64° 84° 3519 2439 1460 845 548
06-05 65° 78° 3568 2478 1489 866 564
06-06 61° 81° 3617 2517 1518 888 580
06-07 56° 81° 3664 2554 1545 906 594
06-08 56° 82° 3711 2591 1572 926 608
06-09 53° 79° 3755 2625 1596 941 619
06-10 53° 69° 3794 2654 1615 952 625
06-11 42° 76° 3831 2681 1632 961 629
06-12 56° 88° 3881 2721 1662 983 646
06-13 68° 91° 3938 2768 1699 1013 670
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 66° 86° 3992 2812 1733 1039 691
06-15 61° 84° 4043 2853 1764 1062 709
06-16 63° 93° 4099 2899 1800 1089 732
06-17 74° 94° 4161 2951 1842 1123 761
06-18 74° 88° 4220 3000 1881 1154 787
06-19 74° 92° 4281 3051 1922 1187 815
06-20 71° 92° 4341 3101 1962 1219 842
06-21 69° 92° 4400 3150 2001 1250 867
06-22 72° 92° 4459 3199 2041 1282 894
06-23 70° 84° 4515 3244 2076 1309 916
06-24 63° 85° 4567 3287 2108 1333 935
06-25 72° 79° 4620 3330 2141 1359 956
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 68° 80° 4672 3372 2173 1383 975
06-27 63° 78° 4721 3410 2202 1403 990
06-28 63° 84° 4772 3452 2233 1427 1009
06-29 75° 86° 4831 3500 2272 1457 1034
06-30 57° 77° 4875 3535 2296 1473 1045
07-01 50° 75° 4915 3565 2316 1485 1053
07-02 58° 84° 4964 3604 2345 1507 1069
07-03 73° 85° 5021 3651 2382 1536 1093
07-04 69° 76° 5072 3692 2413 1558 1110
07-05 65° 83° 5124 3734 2445 1582 1129
07-06 61° 82° 5173 3773 2474 1603 1146
07-07 61° 86° 5225 3814 2506 1627 1164
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 66° 87° 5279 3859 2540 1653 1186
07-09 66° 74° 5327 3897 2568 1673 1201
07-10 64° 81° 5378 3937 2599 1696 1218
07-11 66° 80° 5428 3978 2629 1719 1236
07-12 63° 84° 5480 4020 2661 1742 1255
07-13 66° 88° 5535 4065 2696 1769 1277
07-14 70° 84° 5590 4110 2731 1796 1299
07-15 67° 88° 5645 4155 2766 1824 1321
07-16 68° 83° 5699 4199 2800 1849 1342
07-17 67° 82° 5751 4241 2832 1874 1361
07-18 58° 74° 5796 4276 2857 1890 1372
07-19 54° 76° 5839 4309 2880 1905 1383
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 56° 78° 5884 4344 2905 1922 1395
07-21 62° 79° 5932 4382 2933 1943 1410
07-22 62° 82° 5982 4422 2963 1965 1427
07-23 62° 82° 6032 4462 2994 1987 1444
07-24 65° 78° 6082 4502 3023 2008 1461
07-25 64° 80° 6132 4542 3053 2030 1478
07-26 55° 80° 6178 4577 3079 2048 1490
07-27 57° 82° 6225 4615 3106 2068 1505
07-28 66° 81° 6277 4657 3138 2091 1524
07-29 67° 83° 6330 4700 3171 2116 1544
07-30 68° 87° 6385 4745 3206 2144 1566
07-31 67° 83° 6439 4789 3240 2169 1587
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 67° 83° 6492 4831 3273 2194 1606
08-02 68° 83° 6545 4875 3306 2219 1627
08-03 65° 88° 6599 4919 3341 2246 1648
08-04 68° 88° 6655 4965 3376 2274 1671
08-05 71° 90° 6714 5014 3415 2304 1696
08-06 70° 89° 6771 5061 3452 2334 1721
08-07 65° 77° 6820 5100 3482 2355 1737
08-08 61° 82° 6870 5140 3511 2376 1754
08-09 60° 75° 6916 5176 3537 2394 1767
08-10 51° 74° 6957 5207 3558 2407 1774
08-11 51° 77° 6999 5239 3580 2421 1783
08-12 53° 79° 7042 5272 3603 2437 1794
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 57° 82° 7090 5310 3631 2456 1808
08-14 55° 84° 7137 5347 3659 2476 1823
08-15 65° 76° 7186 5386 3687 2497 1839
08-16 67° 84° 7240 5429 3721 2522 1859
08-17 65° 78° 7289 5469 3750 2543 1876
08-18 64° 77° 7337 5507 3779 2564 1891
08-19 61° 76° 7384 5544 3805 2582 1905
08-20 53° 71° 7424 5574 3825 2594 1912
08-21 50° 72° 7463 5603 3844 2605 1918
08-22 47° 76° 7503 5633 3864 2617 1924
08-23 50° 81° 7546 5666 3887 2632 1935
08-24 59° 89° 7598 5708 3919 2656 1954
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 64° 90° 7653 5753 3954 2683 1976
08-26 68° 91° 7710 5800 3992 2713 2000
08-27 70° 93° 7770 5850 4031 2744 2027
08-28 68° 85° 7824 5894 4066 2771 2048
08-29 66° 89° 7880 5940 4101 2798 2071
08-30 69° 91° 7938 5988 4139 2829 2096
08-31 63° 80° 7988 6027 4169 2850 2112
09-01 59° 78° 8034 6064 4195 2868 2126
09-02 52° 74° 8075 6095 4216 2881 2134
09-03 49° 74° 8115 6125 4236 2893 2141
09-04 50° 83° 8159 6159 4260 2909 2152
09-05 63° 86° 8211 6201 4292 2934 2171
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 56° 75° 8255 6234 4316 2949 2181
09-07 48° 65° 8289 6259 4330 2955 2183
09-08 41° 68° 8321 6281 4343 2960 2183
09-09 44° 76° 8360 6310 4361 2970 2188
09-10 47° 81° 8402 6342 4383 2984 2198
09-11 49° 86° 8448 6378 4409 3002 2210
09-12 54° 88° 8497 6416 4438 3023 2226
09-13 59° 84° 8546 6456 4467 3044 2243
09-14 63° 89° 8600 6500 4501 3071 2264
09-15 60° 88° 8652 6542 4533 3094 2283
09-16 54° 88° 8701 6581 4562 3115 2299
09-17 55° 85° 8749 6619 4590 3135 2314
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 51° 86° 8796 6656 4617 3154 2327
09-19 54° 88° 8845 6695 4646 3175 2343
09-20 58° 88° 8896 6736 4677 3198 2362
09-21 59° 90° 8949 6778 4710 3223 2381
09-22 62° 76° 8995 6815 4737 3242 2395
09-23 65° 68° 9040 6850 4761 3258 2407
09-24 64° 74° 9087 6887 4788 3277 2420
09-25 62° 74° 9133 6923 4814 3295 2433
09-26 57° 80° 9179 6959 4841 3314 2447
09-27 63° 72° 9225 6995 4866 3331 2460
09-28 63° 77° 9273 7033 4894 3351 2474
09-29 65° 79° 9323 7073 4924 3373 2491
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 64° 75° 9371 7111 4952 3393 2506

 

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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