Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to July 30​, 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
2072
2075
1776
2238
3357
1947
1729
2793
3399
3334
Lone Rock1905
1894
2030
3101
1724
1521
2529
3132
3106
​​Beloit
1913
1999
1750
2061
3137
1774
1568
2584
3168
3123
Sullivan
1813
1835
1939
2972
1646
1453
2433
3004
2988
Madison
1858
1852
1743
1993
3035
1706
1507
2498
3081
3068
Juneau
1767
1776
1887
2905
1595
1409
2364
2934
2927
Racine1726
1830
1861
2888
1597
1415
2369
2919
2915
Waukesha1708
1767
1830
2833
1548
1365
2311
2875
2885
Milwaukee1690
1816
1610
1822
2830
1558
1379
2308
2856
2859
Hartford
1702
1701
1548
1823
2819
1539
1360
2296
2856
2859
Appleton1627
1711
1595
1756
2727
1498
1318
2224
2767
2782
Green Bay1637
1692
1542
1769
2745
1513
1336
2246
2780
2780
Big Flats​1718
1694
1826
2829
1527
1345
2280
2847
2861
Ha​ncock​1633
1603
1607
1742
2721
1456
1278
2185
2740
2763
P​t Edwards1662
1603
1776
2758
1492
1311
2225
2778
2791
La Crosse1908
1840
1907
2045
3108
1754
1551
2553
3150
3142
Eau Claire1750
1710
1674
1880
2882
1604
1414
2361
2921
2912
Cumberland
1492
1448
1496
1604
2540
1338
1164
2039
2580
2627
Bayfield1291
1157
1366
2224
1111
954
1732
2234
2306
Wausau1444
1393
1534
1541
2444
1276
1110
1951
2473
2533
Medford1404
1361
1400
1498
2403
1237
1070
1907
2433
2502
​Crivitz
1473
1477
1559
2486
1280
1117
1948
2486
2522
Crandon1271
1225
1348
2204
1089
931
1722
2224
2317
​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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