Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to May 5, 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
377
246
249
372
820
225
169
509
806
930
Lone Rock341
215
317
740
173
127
408
704
840
Beloit
359
233
245
355
771
227
177
474
757
874
Sullivan
299
205
290
671
176
130
386
649
766
Madison
302
204
237
294
676
175
129
402
661
774
Juneau
288
189
277
646
161
117
366
621
739
Racine289
197
292
667
181
130
413
663
775
Waukesha280
193
276
643
169
120
383
632
741
Milwaukee
286
212
178
285
654
176
124
405
648
760
Hartford
256
185
190
251
604
148
105
347
589
698
Appleton
239
166
178
230
581
122
80
323
567
674
Green Bay​234
164
170
219
566
106
67
305
548
657
Big Flats​
272
175
236
629
97
64
284
572
725
Ha​ncock
243
164
203
213
581
89
55
265
531
672
P​t Edwards236
160
202
580
70
42
253
527
671
La Crosse275
202
266
260
669
129
85
357
642
773
Eau Claire232
171
217
203
577
75
46
276
541
671
Cumberland
157
101
155
131
440
30
14
182
404
522
Bayfield102
82
78
324
8
3
85
278
391
Wausau167
124
177
140
463
36
17
186
419
546
Medford
162
117
150
131
442
29
10
168
399
523
Crivitz199
137
163
497
47
29
192
441
583
Crandon130
101
102
384
19
10
112
327
456
​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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