Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to February 28, 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
48
0
6
38
132
6
1
44
111
158
Lone Rock
43
0
31
116
3
1
29
91
139
Beloit
41
0
7
34
113
10
8
41
98
136
Sullivan
33
0
26
93
8
6
28
78
113
Madison
34
0
4
26
85
2
0
29
73
106
Juneau
30
0
24
80
7
5
24
68
99
Racine39
2

35
109
14
11
42
96
133
Waukesha30
0
27
93
11
9
31
79
112
Milwaukee
36
2
1
33
104
13
11
41
91
127
Hartford
24
0
4
20
76
8
6
23
65
95
Appleton
19
0
2
15
67
4
2
15
56
85
Green Bay18
0
1
14
67
0
0
9
54
84
Big Flats​
32
0
21
102
0
0
10
74
122
Ha​ncock
25
0
2
18
85
2
0
10
63
104
P​t Edwards
26
0
17
93
0
0
7
67
110
La Crosse29
0
4
21
106
0
0
13
84
130
Eau Claire22
0
2
15
91
0
0
5
69
111
Cumberland
6
0
0
4
57
0
0
0
38
72
Bayfield
3
0
2
44
0
0
2
30
58
Wausau12
0
1
9
68
0
0
2
47
83
Medford
13
0
0
9
67
0
0
2
46
82
Crivitz13
0
8
61
0
0
2
42
79
Crandon
10
0
6
58
0
0
1
38
73
​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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