Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to August 29, 2024​​​​​​​​​

​Location​​
​Mod 50°F
Corn development, 
Codling moth, 
European corn borer​​
​2023 GDDs
Mod base 50F
​30-yr avg.

1991-2020


​Sine B48
Alfalfa weevil
​Mod B40
Onion maggot
​Simple B50
Flea beetles, Imported cabbageworm,​ Squash vine borer
​Simple B52
Colorado potato beetle, Corn rootworm adults
​​Simple B43
Cabbage maggot
​Sine B39
Seedcorn maggot
​​Mod B38
​Western bean cutworm
Dubuque IA
2745
2663
2382
2987
4378
2623
2335
3719
4452
4389
Lone Rock2511
2449
2711
4065
2338
2060
3385
4129
4123
​​Beloit
2618
2467
2366
2852
4210
2506
2223
3565
4286
4223
Sullivan
2452
2356
2662
3973
2318
2041
3341
4052
4037
Madison
2473
2440
2348
2694
4008
2347
2069
3386
4095
4086
Juneau
2371
2293
2574
3870
2226
1949
3242
3950
3961
Racine2474
2271
2705
4019
2374
2093
3418
4105
4094
Waukesha2369
2280
2580
3875
2240
1959
3267
3967
3977
Milwaukee2457
2364
2262
2683
3990
2351
2070
3393
4072
4051
Hartford
2291
2243
2098
2499
3777
2161
1886
3172
3867
3881
Appleton2303
2276
2188
2510
3787
2168
1894
3181
3881
3899
Green Bay2289
2238
2107
2491
3764
2144
1873
3155
3851
3854
Big Flats​
2271
2243
2437
3754
2061
1796
3060
3804
3855
Ha​ncock​2157
2178
2173
2327
3616
1963
1698
2951
3675
3736
P​t Edwards2171
2172
2337
3637
1967
1706
2962
3692
3751
La Crosse2461
2489
2562
2671
4011
2311
2035
3351
4090
4104
Eau Claire2295
2391
2261
2482
3783
2120
1859
3134
3853
3889
Cumberland
1954
2006
2047
2121
3346
1774
1526
2737
3422
3520
Bayfield1594
1662

1713
2855
1377
1158
2248
2908
3040
Wausau1898
1930
2087
2053
3288
1700
1449
2662
3357
3459
Medford
1846
1860
1911
1990
3212
1636
1388
2587
3280
3398
Crivitz2013
1989
2147
3393
1774
1528
2731
3436
3481
Crandon1686
1748
1817
3002
1468
1233
2372
3052
3193
​Key​ to GDD calculation methods: Modified B50°F; 2023 Modified B50°F; 30-Year Average 1991-2020; Sine B48°F; Modified​ B40°F; Simple B50​​°F; Simple B52°F; Simple B43°F, Sine B39°F; Modified B38°F.   ​ ​ ​ ​ ​ ​ ​ ​ ​ 

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