Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to February 16, 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
4
7
2
3
33
0
0
0
23
41
Lone Rock4
5
3
26
0
0
0
17
33
​​Beloit
3
3
3
2
23
0
0
0
15
30
Sullivan
2
2
2
18
0
0
0
12
24
Madison
3
2
1
2
21
0
0
0
14
28
Juneau
3
2
2
18
0
0
0
12
24
Racine1
5
1
20
0
0
0
13
28
Waukesha2
3
2
17
0
0
0
11
22
Milwaukee4
5
1
3
21
0
0
0
14
28
Hartford
2
3
1
1
16
0
0
0
10
22
Appleton2
1
0
1
13
0
0
0
9
18
Green Bay2
1
0
1
14
0
0
0
9
19
Big Flats​
3
4
2
17
0
0
0
11
22
Ha​ncock​2
1
0
1
14
0
0
0
9
18
P​t Edwards1
3

1
11
0
0
0
7
14
La Crosse4
5
1
3
22
0
0
0
15
29
Eau Claire0
9
0
0
8
0
0
0
5
11
Cumberland
0
0
0
0
2
0
0
0
1
4
Bayfield0
1
0
1
0
0
0
0
2
Wausau0
2
0
0
2
0
0
0
1
4
Medford0
3
0
0
2
0
0
0
1
4
Crivitz0
0
0
5
0
0
0
2
7
Crandon0
1
0
1
0
0
0
0
2
​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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