Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to October 12, 2025​​​​​​​​​

​Location​​
​Mod 50°F
Corn development, 
Codling moth, 
European corn borer​​
​2024 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
3470
3466
2939
3774
5482
3332
2966
4696
5588
5413
Lone Rock3172
3145
3418
5072
2948
2601
4271
5166
5064
​​Beloit
3206
3305
2944
3478
5135
3031
2677
4358
5231
5094
Sullivan
3068
3112

3319
4934
2867
2528
4171
5033
4957
Madison
3111
3134
2898
3377
5003
2933
2588
4244
5119
5052
Juneau
2984
3015
3223
4824
2769
2440
4055
4918
4858
Racine3015
3167
3287
4905
2874
2544
4164
5002
4955
Waukesha2936
3020
3188
4775
2749
2420
4030
4887
4858
Milwaukee2964
3147
2851
3233
4831
2819
2492
4088
4923
4883
Hartford
2918
2937
2609
3163
4742
2721
2398
3996
4848
4810
Appleton2821
2950
2712
3073
4628
2658
2337
3900
4737
4718
Green Bay2843
2934
2612
3099
4659
2686
2366
3935
4760
4712
Big Flats​2856
2894
3070
4652
2605
2283
3870
4734
4719
Ha​ncock​2749
2761
2683
2964
4521
2512
2197
3750
4602
4595
P​t Edwards2792
2776

3010
4568
2559
2240
3803
4651
4631
La Crosse3195
3116
3162
3456
5101
3006
2656
4322
5212
5148
Eau Claire2975
2958
2777
3223
4806
2784
2455
4055
4910
4862
Cumberland
2568
2544
2498
2786
4293
2354
2046
3558
4398
4458
Bayfield2240
2129
2401
3819
1980
1694
3080
3886
3976
Wausau2452
2434
2550
2640
4108
2205
1907
3375
4199
4274
Medford2405
2371
2346
2583
4054
2149
1852
3316
4144
4235
​Crivitz
2527
2589
2693
4187
2237
1937
3412
4247
4253
Crandon2167
2194
2328
3745
1905
1617
3020
3824
3951
​Key​ to GDD calculation methods: Modified B50°F; 2024 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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