Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to April 24, 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
264
177
171
249
613
129
93
335
588
705
Lone Rock235
150
208
548
92
65
253
504
629
Beloit
235
178
169
221
555
120
88
296
533
641
Sullivan
188
156
171
469
81
54
225
441
547
Madison
195
150
160
181
480
88
60
243
457
559
Juneau
186
141
166
453
76
50
212
421
527
Racine195
165
187
481
97
64
263
468
571
Waukesha180
151
168
455
85
53
233
436
534
Milwaukee
193
172
123
183
471
95
62
259
458
559
Hartford
160
143
125
147
418
67
42
201
396
493
Appleton
154
135
112
137
407
56
30
188
385
481
Green Bay​152
137
108
132
397
45
22
177
372
470
Big Flats​
186
131
150
462
42
25
159
400
539
Ha​ncock
160
123
131
130
419
36
19
145
363
490
P​t Edwards
164
119
131
429
31
16
144
371
501
La Crosse199
136
178
179
507
78
50
230
471
590
Eau Claire169
124
139
140
435
43
25
171
391
509
Cumberland
112
72
93
88
324
13
4
104
281
386
Bayfield
66
68
48
236
0
0
44
191
288
Wausau112
96
111
88
338
12
5
102
288
402
Medford
115
88
90
89
330
13
4
96
281
391
Crivitz132
114
100
362
10
4
102
303
430
Crandon80
81
58
274
2
0
48
216
329
​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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