Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to September 10, 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
2861
2924
2602
3106
4560
2730
2428
3870
4639
4526
Lone Rock2622
2672
2819
4222
2424
2137
3523
4291
4239
​​Beloit
2635
2791
2592
2852
4258
2476
2186
3580
4327
4254
Sullivan
2525
2626
2722
4087
2342
2064
3422
4157
4118
Madison
2565
2646
2564
2776
4151
2402
2120
3489
4237
4208
Juneau
2453
2537
2640
3989
2259
1989
3322
4057
4031
Racine2476
2664
2690
4055
2344
2078
3409
4120
4092
Waukesha2409
2542
2606
3942
2238
1971
3295
4023
4016
Milwaukee2432
2653
2498
2645
3990
2298
2035
3343
4052
4028
Hartford
2392
2459
2297
2584
3912
2213
1950
3263
3987
3975
Appleton2318
2480
2399
2518
3822
2172
1910
3193
3902
3898
Green Bay2341
2467
2305
2545
3854
2202
1942
3230
3928
3898
Big Flats​2357
2435
2527
3860
2138
1873
3184
3918
3919
Ha​ncock​2260
2313
2378
2431
3739
2053
1796
3075
3796
3807
P​t Edwards2302
2334
2478
3789
2104
1842
3130
3848
3843
La Crosse2642
2637
2799
2853
4248
2474
2187
3567
4330
4295
Eau Claire2449
2480
2469
2650
3984
2285
2015
3336
4062
4035
Cumberland
2100
2116
2236
2278
3539
1922
1671
2910
3620
3678
Bayfield1835
1740
1959
3133
1610
1378
2511
3181
3263
Wausau2028
2042
2277
2178
3403
1817
1575
2781
3471
3540
Medford1969
1987
2093
2113
3339
1758
1516
2714
3408
3491
​Crivitz
2101
2169
2236
3486
1859
1617
2819
3523
3535
Crandon1792
1821
1917
3090
1562
1329
2476
3148
3262
​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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