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Japanese Beetle Adults Emerge, Breed and Feed (GDD 50)
through Fri, Dec. 12. 2025

 
  

Marion, OH

        

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 28° 38° 11 1 0 0 0
02-16 23° 36° 19 1 0 0 0
02-17 9° 22° 19 1 0 0 0
02-18 3° 15° 19 1 0 0 0
02-19 10° 18° 19 1 0 0 0
02-20 12° 21° 19 1 0 0 0
02-21 20° 27° 20 1 0 0 0
02-22 13° 31° 20 1 0 0 0
02-23 20° 38° 27 1 0 0 0
02-24 33° 49° 46 10 0 0 0
02-25 36° 54° 69 23 3 0 0
02-26 29° 41° 82 26 3 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 48° 101 35 3 0 0
02-28 30° 56° 122 46 4 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 22° 46° 134 48 4 0 0
03-02 16° 29° 135 48 4 0 0
03-03 20° 39° 142 48 4 0 0
03-04 36° 63° 170 65 11 0 0
03-05 35° 57° 193 79 15 0 0
03-06 26° 35° 202 79 15 0 0
03-07 25° 42° 213 80 15 0 0
03-08 26° 38° 223 80 15 0 0
03-09 27° 55° 242 89 15 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 33° 65° 269 106 22 0 0
03-11 39° 68° 301 128 34 4 0
03-12 33° 62° 326 143 39 4 0
03-13 26° 70° 352 159 45 4 0
03-14 41° 77° 389 187 62 13 4
03-15 56° 71° 431 218 84 26 13
03-16 36° 59° 456 234 90 26 13
03-17 29° 47° 473 240 90 26 13
03-18 36° 68° 503 260 100 29 13
03-19 57° 69° 544 291 121 42 21
03-20 35° 64° 571 309 128 42 21
03-21 25° 52° 588 315 128 42 21
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 35° 49° 608 325 128 42 21
03-23 24° 42° 619 327 128 42 21
03-24 35° 49° 639 337 128 42 21
03-25 29° 49° 656 344 128 42 21
03-26 26° 48° 671 349 128 42 21
03-27 28° 60° 694 361 131 42 21
03-28 46° 67° 729 386 145 48 23
03-29 58° 75° 773 421 170 65 34
03-30 56° 69° 814 451 191 78 42
03-31 40° 56° 840 467 197 78 42
04-01 34° 47° 858 475 197 78 42
04-02 39° 73° 892 499 210 84 43
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 52° 69° 930 527 229 94 48
04-04 45° 57° 959 546 238 95 48
04-05 46° 62° 991 568 249 98 48
04-06 33° 46° 1008 575 249 98 48
04-07 27° 51° 1024 582 249 98 48
04-08 24° 39° 1034 582 249 98 48
04-09 25° 46° 1048 585 249 98 48
04-10 37° 49° 1069 596 251 98 48
04-11 33° 43° 1085 602 251 98 48
04-12 27° 52° 1102 610 251 98 48
04-13 32° 58° 1125 623 254 98 48
04-14 52° 73° 1166 653 274 111 55
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 40° 54° 1191 668 279 111 55
04-16 33° 52° 1211 679 280 111 55
04-17 30° 63° 1236 693 284 111 55
04-18 56° 82° 1283 730 311 130 69
04-19 53° 72° 1324 761 332 143 77
04-20 47° 66° 1358 786 346 149 79
04-21 53° 72° 1399 816 367 162 87
04-22 48° 69° 1435 843 384 170 90
04-23 48° 78° 1477 874 405 184 98
04-24 52° 84° 1522 910 431 202 111
04-25 61° 74° 1568 946 457 219 124
04-26 45° 64° 1601 968 469 224 124
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 36° 65° 1629 987 478 224 124
04-28 44° 77° 1668 1015 496 235 129
04-29 64° 79° 1717 1055 526 256 146
04-30 45° 68° 1752 1080 540 263 148
05-01 54° 77° 1796 1113 564 279 158
05-02 58° 73° 1839 1147 587 294 169
05-03 45° 61° 1870 1168 599 298 169
05-04 46° 60° 1901 1189 610 300 169
05-05 47° 64° 1935 1213 623 306 169
05-06 51° 56° 1967 1234 635 310 169
05-07 49° 70° 2005 1262 653 320 174
05-08 45° 58° 2034 1282 663 321 174
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 42° 61° 2064 1301 672 323 174
05-10 40° 76° 2100 1327 688 331 177
05-11 47° 74° 2138 1356 707 341 183
05-12 51° 76° 2180 1388 728 355 192
05-13 62° 72° 2225 1422 753 372 203
05-14 60° 74° 2269 1457 778 389 215
05-15 62° 84° 2320 1498 809 412 233
05-16 63° 83° 2371 1539 840 435 251
05-17 58° 68° 2412 1570 861 448 259
05-18 56° 69° 2453 1600 881 460 266
05-19 48° 66° 2488 1626 896 467 269
05-20 45° 60° 2519 1646 907 470 269
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 51° 64° 2555 1672 923 478 272
05-22 48° 56° 2584 1692 933 479 272
05-23 41° 61° 2613 1711 942 480 272
05-24 41° 65° 2644 1732 953 484 272
05-25 43° 65° 2676 1754 965 487 272
05-26 43° 69° 2710 1778 979 493 272
05-27 54° 69° 2750 1807 998 505 279
05-28 54° 61° 2785 1833 1014 512 281
05-29 51° 74° 2826 1863 1034 525 289
05-30 54° 69° 2865 1893 1054 536 295
05-31 51° 65° 2901 1919 1070 545 299
06-01 43° 68° 2935 1942 1083 550 299
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 42° 79° 2973 1971 1102 560 305
06-03 56° 86° 3022 2010 1131 581 320
06-04 70° 87° 3079 2056 1167 610 344
06-05 67° 77° 3129 2096 1197 632 361
06-06 65° 73° 3176 2134 1224 651 375
06-07 61° 80° 3225 2172 1253 672 391
06-08 61° 78° 3272 2209 1280 691 405
06-09 62° 74° 3318 2246 1307 709 418
06-10 52° 75° 3360 2277 1328 723 427
06-11 56° 84° 3408 2315 1356 743 442
06-12 65° 87° 3462 2360 1390 769 463
06-13 65° 81° 3513 2400 1421 792 481
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 63° 74° 3560 2437 1448 811 495
06-15 62° 80° 3609 2476 1477 832 511
06-16 62° 82° 3659 2516 1507 854 528
06-17 69° 80° 3711 2558 1539 878 547
06-18 66° 86° 3765 2602 1573 904 568
06-19 64° 72° 3811 2638 1599 922 581
06-20 61° 84° 3861 2679 1630 945 599
06-21 68° 89° 3918 2725 1666 973 622
06-22 74° 93° 3980 2777 1708 1007 651
06-23 73° 94° 4041 2828 1749 1040 679
06-24 73° 94° 4102 2880 1791 1073 707
06-25 73° 89° 4162 2929 1830 1105 734
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 70° 90° 4220 2977 1868 1135 759
06-27 72° 91° 4279 3027 1908 1166 785
06-28 73° 87° 4337 3075 1945 1196 810
06-29 68° 88° 4393 3120 1981 1224 833
06-30 72° 82° 4448 3166 2017 1251 855
07-01 71° 82° 4502 3210 2051 1277 877
07-02 64° 84° 4554 3252 2083 1302 896
07-03 67° 86° 4609 3296 2117 1328 917
07-04 65° 89° 4664 3342 2153 1355 939
07-05 68° 89° 4721 3389 2190 1384 963
07-06 70° 91° 4779 3437 2228 1415 989
07-07 71° 84° 4835 3482 2263 1442 1011
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 69° 83° 4889 3527 2297 1468 1032
07-09 68° 86° 4944 3571 2332 1495 1054
07-10 69° 86° 4999 3617 2368 1522 1076
07-11 69° 88° 5056 3663 2404 1551 1100
07-12 72° 89° 5114 3712 2443 1582 1126
07-13 68° 87° 5170 3758 2478 1609 1148
07-14 71° 86° 5227 3804 2515 1638 1172
07-15 62° 88° 5280 3848 2549 1663 1192
07-16 74° 85° 5337 3895 2586 1693 1217
07-17 71° 84° 5393 3941 2622 1720 1239
07-18 66° 73° 5440 3978 2649 1739 1254
07-19 61° 83° 5491 4018 2679 1762 1271
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 70° 80° 5544 4061 2712 1787 1291
07-21 63° 79° 5592 4100 2741 1807 1307
07-22 56° 81° 5639 4137 2768 1826 1320
07-23 59° 87° 5690 4178 2799 1849 1338
07-24 66° 91° 5747 4225 2835 1878 1362
07-25 72° 89° 5805 4273 2874 1908 1387
07-26 71° 88° 5863 4320 2911 1938 1412
07-27 72° 83° 5918 4366 2947 1965 1434
07-28 71° 86° 5975 4412 2983 1994 1458
07-29 69° 88° 6032 4459 3020 2023 1482
07-30 69° 90° 6089 4507 3057 2052 1506
07-31 63° 73° 6135 4543 3084 2070 1519
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 56° 74° 6178 4576 3107 2086 1530
08-02 55° 75° 6221 4609 3130 2100 1540
08-03 54° 79° 6265 4643 3154 2117 1551
08-04 57° 80° 6312 4680 3180 2135 1564
08-05 59° 84° 6361 4719 3210 2156 1580
08-06 65° 84° 6414 4762 3243 2181 1600
08-07 64° 84° 6466 4804 3275 2205 1620
08-08 66° 86° 6520 4848 3309 2231 1640
08-09 65° 87° 6574 4892 3343 2257 1662
08-10 66° 89° 6630 4937 3378 2285 1684
08-11 68° 90° 6687 4984 3415 2314 1708
08-12 69° 90° 6744 5031 3452 2343 1732
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 69° 83° 6798 5075 3486 2369 1753
08-14 66° 85° 6851 5119 3520 2394 1774
08-15 64° 87° 6905 5162 3553 2420 1794
08-16 66° 90° 6961 5209 3590 2448 1817
08-17 70° 84° 7016 5254 3625 2475 1839
08-18 63° 83° 7067 5295 3656 2498 1857
08-19 63° 88° 7121 5338 3689 2524 1878
08-20 67° 74° 7169 5377 3718 2545 1894
08-21 64° 72° 7215 5413 3743 2562 1906
08-22 58° 80° 7262 5450 3771 2581 1921
08-23 62° 80° 7311 5489 3799 2602 1936
08-24 58° 76° 7356 5524 3825 2619 1949
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 52° 70° 7395 5553 3844 2631 1955
08-26 47° 70° 7432 5580 3861 2639 1958
08-27 46° 72° 7469 5607 3877 2648 1962
08-28 50° 65° 7504 5632 3893 2655 1964
08-29 54° 68° 7543 5661 3912 2667 1971
08-30 45° 71° 7579 5687 3928 2674 1974
08-31 46° 75° 7618 5715 3946 2685 1979
09-01 49° 79° 7660 5747 3968 2699 1988
09-02 49° 80° 7702 5779 3990 2713 1997
09-03 51° 81° 7746 5813 4014 2729 2008
09-04 52° 71° 7785 5843 4034 2740 2014
09-05 47° 78° 7826 5873 4054 2753 2022
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 51° 69° 7864 5901 4072 2763 2027
09-07 43° 69° 7897 5925 4086 2769 2028
09-08 40° 72° 7931 5949 4100 2775 2029
09-09 44° 76° 7970 5977 4118 2785 2034
09-10 48° 79° 8011 6009 4140 2798 2042
09-11 54° 79° 8056 6043 4164 2815 2054
09-12 48° 81° 8098 6076 4187 2829 2063
09-13 51° 80° 8142 6109 4210 2845 2074
09-14 53° 84° 8189 6146 4237 2864 2088
09-15 55° 86° 8237 6185 4265 2884 2103
09-16 56° 86° 8286 6223 4294 2905 2119
09-17 54° 84° 8333 6260 4321 2924 2133
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 52° 86° 8380 6297 4348 2943 2147
09-19 55° 88° 8429 6337 4378 2965 2164
09-20 58° 87° 8480 6378 4408 2987 2181
09-21 65° 85° 8533 6421 4442 3012 2202
09-22 65° 74° 8581 6458 4469 3032 2216
09-23 65° 79° 8631 6498 4499 3054 2233
09-24 64° 74° 8678 6535 4526 3073 2247
09-25 60° 72° 8722 6569 4550 3089 2258
09-26 55° 78° 8766 6604 4575 3105 2269
09-27 53° 82° 8812 6639 4600 3123 2282
09-28 55° 87° 8861 6679 4630 3145 2299
09-29 57° 85° 8911 6718 4659 3166 2315
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 49° 82° 8954 6752 4683 3182 2326
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 26° 48° 15 5 0 0 0
02-16 23° 33° 21 5 0 0 0
02-17 13° 26° 21 5 0 0 0
02-18 13° 34° 23 5 0 0 0
02-19 11° 43° 28 5 0 0 0
02-20 22° 51° 43 10 0 0 0
02-21 29° 61° 66 23 3 0 0
02-22 44° 54° 93 40 10 0 0
02-23 35° 53° 115 52 13 0 0
02-24 21° 33° 120 52 13 0 0
02-25 21° 51° 135 56 13 0 0
02-26 34° 66° 162 74 20 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 54° 69° 202 103 40 12 7
02-28 24° 62° 223 114 41 12 7
02-29 22° 40° 231 114 41 12 7
03-01 24° 45° 244 117 41 12 7
03-02 40° 49° 267 130 43 12 7
03-03 44° 64° 298 151 55 15 7
03-04 50° 74° 338 181 75 27 14
03-05 53° 69° 378 210 94 38 20
03-06 40° 50° 400 223 97 38 20
03-07 40° 47° 422 234 98 38 20
03-08 40° 56° 448 251 104 38 20
03-09 33° 54° 469 262 106 38 20
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 31° 37° 482 265 106 38 20
03-11 25° 55° 500 272 106 38 20
03-12 40° 68° 532 294 118 42 20
03-13 45° 72° 568 321 134 51 23
03-14 51° 68° 605 348 151 60 27
03-15 41° 60° 633 366 160 60 27
03-16 33° 61° 659 382 165 60 27
03-17 33° 48° 677 390 165 60 27
03-18 29° 34° 686 390 165 60 27
03-19 26° 49° 702 396 165 60 27
03-20 28° 44° 716 400 165 60 27
03-21 20° 40° 724 400 165 60 27
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 25° 44° 736 402 165 60 27
03-23 27° 37° 746 402 165 60 27
03-24 22° 47° 759 405 165 60 27
03-25 37° 69° 790 426 176 63 27
03-26 47° 60° 821 447 187 66 27
03-27 31° 46° 838 454 187 66 27
03-28 24° 50° 853 459 187 66 27
03-29 35° 57° 877 473 191 66 27
03-30 42° 64° 908 494 202 70 27
03-31 43° 59° 937 513 211 70 27
04-01 43° 52° 963 529 217 70 27
04-02 47° 64° 997 552 230 76 28
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 38° 54° 1021 566 234 76 28
04-04 35° 45° 1039 574 234 76 28
04-05 37° 45° 1057 583 234 76 28
04-06 33° 54° 1079 595 236 76 28
04-07 32° 60° 1103 609 240 76 28
04-08 51° 75° 1144 639 261 89 36
04-09 54° 74° 1186 671 283 103 45
04-10 55° 60° 1221 697 298 110 47
04-11 51° 64° 1257 723 314 118 50
04-12 46° 55° 1285 741 322 118 50
04-13 42° 63° 1316 761 333 121 50
04-14 49° 81° 1359 795 356 136 60
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 55° 68° 1399 824 376 148 67
04-16 49° 78° 1440 856 397 161 76
04-17 64° 75° 1487 893 424 180 90
04-18 54° 72° 1528 924 445 193 98
04-19 50° 62° 1562 948 459 199 99
04-20 45° 52° 1588 964 465 199 99
04-21 38° 44° 1607 973 465 199 99
04-22 32° 62° 1632 988 470 199 99
04-23 48° 63° 1666 1011 484 205 99
04-24 39° 51° 1689 1025 487 205 99
04-25 30° 57° 1711 1036 489 205 99
04-26 36° 72° 1743 1059 501 209 99
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 63° 81° 1793 1098 531 231 116
04-28 66° 83° 1845 1141 563 255 135
04-29 62° 82° 1895 1181 593 277 152
04-30 57° 72° 1938 1213 616 292 162
05-01 50° 81° 1982 1247 640 308 173
05-02 53° 85° 2029 1284 667 327 187
05-03 62° 76° 2075 1321 693 345 201
05-04 62° 74° 2122 1357 720 364 214
05-05 63° 78° 2170 1396 748 384 229
05-06 58° 71° 2212 1428 770 398 238
05-07 56° 78° 2257 1463 795 415 250
05-08 61° 81° 2306 1502 824 436 266
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 51° 64° 2342 1528 840 444 269
05-10 49° 64° 2376 1552 854 450 271
05-11 47° 63° 2409 1575 867 455 271
05-12 44° 72° 2445 1600 883 463 273
05-13 56° 80° 2491 1636 909 481 286
05-14 58° 67° 2531 1667 929 493 294
05-15 59° 66° 2572 1698 950 506 301
05-16 52° 77° 2614 1730 972 520 311
05-17 63° 71° 2659 1765 997 537 323
05-18 59° 82° 2708 1804 1026 558 338
05-19 57° 87° 2758 1844 1056 580 355
05-20 63° 88° 2811 1887 1089 605 376
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 65° 89° 2867 1932 1125 633 398
05-22 70° 86° 2923 1978 1161 661 421
05-23 59° 80° 2970 2016 1188 680 436
05-24 60° 85° 3021 2057 1219 703 453
05-25 66° 84° 3074 2100 1252 728 473
05-26 58° 82° 3122 2138 1280 748 489
05-27 60° 72° 3166 2172 1304 764 499
05-28 56° 71° 3207 2203 1325 777 508
05-29 53° 67° 3245 2231 1343 787 513
05-30 50° 69° 3283 2258 1361 797 517
05-31 45° 75° 3321 2287 1379 807 522
06-01 50° 81° 3364 2320 1402 822 533
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 62° 74° 3410 2356 1428 840 546
06-03 62° 82° 3460 2396 1458 862 563
06-04 63° 87° 3513 2439 1491 887 583
06-05 69° 83° 3568 2483 1526 914 604
06-06 63° 79° 3617 2523 1555 935 620
06-07 59° 77° 3663 2558 1581 953 633
06-08 53° 80° 3707 2593 1605 969 644
06-09 59° 76° 3753 2628 1631 987 657
06-10 53° 62° 3788 2654 1646 994 659
06-11 47° 75° 3827 2683 1665 1005 665
06-12 57° 84° 3875 2721 1693 1025 681
06-13 62° 88° 3929 2764 1727 1051 701
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 69° 83° 3983 2809 1761 1077 722
06-15 55° 81° 4029 2844 1787 1095 735
06-16 56° 88° 4079 2885 1817 1117 753
06-17 71° 95° 4140 2936 1858 1150 780
06-18 73° 93° 4201 2987 1899 1183 809
06-19 74° 91° 4262 3037 1940 1216 836
06-20 72° 93° 4322 3088 1980 1248 864
06-21 73° 95° 4384 3140 2022 1282 893
06-22 72° 92° 4444 3190 2062 1314 920
06-23 70° 84° 4499 3235 2097 1341 942
06-24 64° 81° 4550 3275 2128 1364 959
06-25 64° 79° 4599 3315 2157 1385 976
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 63° 78° 4647 3353 2185 1405 991
06-27 61° 77° 4695 3390 2213 1425 1005
06-28 59° 85° 4744 3430 2242 1446 1022
06-29 76° 82° 4801 3477 2279 1475 1046
06-30 60° 75° 4847 3513 2305 1493 1058
07-01 55° 74° 4889 3545 2327 1507 1068
07-02 55° 83° 4936 3582 2354 1526 1082
07-03 72° 87° 4993 3629 2391 1555 1106
07-04 70° 81° 5047 3673 2425 1581 1127
07-05 65° 79° 5097 3713 2455 1603 1144
07-06 64° 81° 5148 3754 2486 1626 1161
07-07 61° 84° 5199 3794 2517 1649 1179
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 64° 87° 5253 3838 2551 1675 1200
07-09 70° 83° 5307 3883 2585 1701 1222
07-10 66° 78° 5357 3923 2615 1723 1239
07-11 60° 83° 5407 3962 2645 1745 1255
07-12 67° 87° 5461 4007 2679 1771 1277
07-13 67° 88° 5517 4052 2715 1799 1299
07-14 68° 86° 5572 4097 2750 1826 1321
07-15 69° 88° 5628 4144 2786 1854 1344
07-16 75° 85° 5686 4192 2824 1884 1369
07-17 70° 83° 5741 4236 2859 1911 1391
07-18 60° 75° 5787 4272 2885 1929 1404
07-19 54° 78° 5831 4307 2909 1945 1416
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 55° 81° 5877 4343 2935 1963 1429
07-21 58° 81° 5925 4380 2963 1983 1443
07-22 65° 79° 5975 4420 2993 2005 1460
07-23 63° 84° 6026 4462 3024 2028 1479
07-24 66° 84° 6079 4505 3057 2053 1499
07-25 64° 81° 6130 4545 3088 2076 1516
07-26 57° 79° 6176 4581 3114 2094 1529
07-27 54° 84° 6223 4619 3141 2113 1543
07-28 59° 89° 6275 4660 3173 2137 1562
07-29 72° 86° 6331 4707 3209 2165 1586
07-30 70° 86° 6387 4753 3245 2193 1609
07-31 68° 89° 6444 4800 3282 2222 1632
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 68° 90° 6501 4847 3319 2251 1657
08-02 68° 83° 6555 4890 3353 2277 1677
08-03 69° 86° 6610 4936 3388 2304 1699
08-04 64° 87° 6664 4979 3422 2330 1720
08-05 69° 88° 6720 5026 3458 2358 1743
08-06 69° 90° 6778 5073 3496 2388 1768
08-07 67° 78° 6828 5114 3526 2410 1786
08-08 67° 84° 6881 5157 3559 2435 1806
08-09 65° 80° 6932 5198 3590 2458 1823
08-10 54° 74° 6974 5230 3612 2472 1833
08-11 53° 75° 7017 5262 3635 2487 1842
08-12 53° 80° 7061 5297 3659 2503 1854
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 60° 81° 7110 5335 3688 2524 1869
08-14 56° 83° 7157 5373 3715 2543 1884
08-15 58° 83° 7206 5411 3744 2564 1899
08-16 69° 83° 7260 5456 3778 2590 1920
08-17 67° 86° 7315 5501 3813 2617 1942
08-18 66° 80° 7366 5542 3844 2640 1960
08-19 61° 72° 7410 5576 3868 2656 1972
08-20 52° 70° 7449 5605 3887 2667 1977
08-21 47° 72° 7486 5632 3904 2676 1982
08-22 46° 76° 7526 5661 3924 2688 1988
08-23 50° 81° 7569 5695 3947 2703 1999
08-24 54° 86° 7617 5733 3975 2723 2014
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 62° 89° 7671 5777 4009 2749 2035
08-26 65° 91° 7727 5823 4045 2777 2058
08-27 68° 94° 7786 5872 4084 2808 2084
08-28 69° 92° 7845 5921 4123 2839 2110
08-29 71° 90° 7904 5969 4162 2870 2135
08-30 68° 94° 7963 6018 4201 2901 2161
08-31 68° 80° 8015 6061 4233 2925 2180
09-01 60° 83° 8065 6100 4263 2947 2197
09-02 55° 72° 8106 6132 4284 2960 2206
09-03 47° 76° 8146 6161 4304 2972 2212
09-04 49° 83° 8190 6196 4328 2988 2223
09-05 53° 86° 8237 6233 4355 3007 2238
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 59° 79° 8284 6270 4382 3026 2252
09-07 50° 63° 8318 6294 4396 3032 2253
09-08 40° 69° 8351 6317 4409 3037 2253
09-09 45° 78° 8390 6346 4428 3048 2259
09-10 50° 82° 8434 6380 4452 3064 2270
09-11 54° 85° 8482 6418 4480 3084 2285
09-12 57° 88° 8532 6458 4510 3106 2302
09-13 58° 85° 8582 6498 4540 3128 2319
09-14 60° 87° 8634 6539 4572 3152 2338
09-15 59° 88° 8685 6581 4603 3175 2356
09-16 57° 84° 8733 6619 4631 3195 2371
09-17 55° 81° 8780 6655 4658 3214 2385
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 63° 86° 8832 6698 4690 3238 2404
09-19 57° 86° 8882 6738 4720 3260 2421
09-20 58° 89° 8934 6779 4752 3284 2440
09-21 64° 90° 8989 6824 4787 3311 2462
09-22 57° 90° 9041 6866 4819 3335 2481
09-23 64° 70° 9086 6902 4844 3352 2493
09-24 63° 76° 9134 6939 4872 3372 2508
09-25 64° 75° 9181 6977 4899 3391 2522
09-26 62° 72° 9227 7012 4925 3409 2535
09-27 66° 72° 9273 7049 4951 3427 2548
09-28 64° 75° 9321 7086 4979 3447 2563
09-29 65° 71° 9367 7122 5005 3465 2576
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 65° 72° 9413 7158 5031 3483 2589

 

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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