Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to October 6, 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
3408
3390
2889
3708
5371
3282
2928
4604
5472
5291
Lone Rock3118
3083
3367
4978
2920
2581
4201
5071
4961
​​Beloit
3155
3238
2890
3427
5042
3000
2657
4285
5134
4990
Sullivan
3021
3055
3270
4843
2838
2508
4100
4938
4855
Madison
3062
3074
2848
3326
4910
2900
2566
4169
5020
4948
Juneau
2936
2959
3174
4732
2742
2420
3986
4824
4757
Racine2971
3110
3239
4812
2841
2523
4088
4902
4850
Waukesha2892
2966
3141
4685
2720
2401
3959
4791
4757
Milwaukee2914
3092
2799
3180
4734
2782
2467
4009
4820
4774
Hartford
2871
2883
2561
3115
4652
2692
2377
3925
4752
4709
Appleton2778
2899
2666
3029
4541
2632
2317
3834
4646
4621
Green Bay2800
2885
2568
3053
4570
2658
2345
3867
4668
4613
Big Flats​2814
2842
3032
4572
2589
2273
3817
4654
4630
Ha​ncock​2709
2711
2637
2928
4443
2497
2188
3701
4525
4508
P​t Edwards2752
2729
2974
4492
2546
2233
3754
4576
4546
La Crosse3145
3057
3108
3406
5009
2975
2636
42​50
5117
5046
Eau Claire2930
2904
2731
3181
4722
2763
2441
3996
4825
4769
Cumberland
2532
2497
2462
2754
4221
2344
2042
3515
4328
4378
Bayfield2213
2095
2379
3758
1975
1691
3058
3832
3908
Wausau2422
2394
2511
2616
4046
2200
1906
3345
4139
4203
Medford2370
2330
2311
2555
3986
2144
1850
3282
4080
4161
​Crivitz
2488
2543
2659
4113
2222
1928
3364
4172
4168
Crandon2146
2160
2310
3689
1901
1616
2997
3773
3889
​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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