Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to September 30, 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
3312
3212
2836
3616
5262
3188
2835
4507
5365
5254
Lone Rock3019
2973
3270
4877
2830
2488
4101
4972
4924
​​Beloit
3165
2991
2834
3462
5075
3051
2704
4334
5177
5057
Sullivan
2989
2850
3259
4824
2849
2508
4096
4933
4872
Madison
3008
2966
2797
3289
4857
2876
2534
4139
4975
4928
Juneau
2895
2774
3153
4702
2738
2398
3978
4813
4783
Racine3040
2779
3332
4901
2936
2590
4204
5018
4981
Waukesha2904
2768
3176
4725
2770
2425
4020
4848
4820
Milwaukee3023
2883
2745
3310
4873
2915
2569
4180
4986
4927
Hartford
2820
2715
2513
3084
4616
2681
2341
3915
4737
4712
Appleton2837
2746
2622
3103
4635
2695
2357
3932
4759
4747
Green Bay2821
2703
2521
3084
4612
2672
2337
3908
4730
4697
Big Flats​
2782
2723
3000
4568
2556
2227
3779
4649
4659
Ha​ncock​2652
2635
2593
2870
4410
2437
2108
3649
4500
4527
P​t Edwards2671
2627
2888
4439
2449
2125
3668
4525
4552
La Crosse2996
3020
3053
3263
4856
2836
2497
4100
4968
4956
Eau Claire2849
2902
2686
3092
4645
2663
2338
3900
4746
4741
Cumberland
2451
2456
2425
2664
4141
2247
1935
3434
4247
4326
Bayfield2057
2032
2211
3596
1799
1521
2890
3679
3797
Wausau2347
2336
2471
2546
4031
2121
1808
3306
4130
4225
Medford
2285
2257
2273
2467
3937
2039
1729
3213
4035
4151
Crivitz2486
2394
2652
4145
2206
1896
3387
4219
4222
Crandon2118​
2109
2283
3712
1858
1564
2982
3791
3927
​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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