Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to June 19, 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
1141
1017
896
1227
2039
994
848
1592
2063
2157
Lone Rock1032
911
1081
1862
845
709
1395
1867
1985
Beloit
1106
917
872
1186
1966
972
832
1534
1988
2070
Sullivan
972
841
1036
1774
829
694
1355
1793
1893
Madison
980
880
865
1052
1794
843
706
1385
1821
1921
Juneau
936
815
994
1720
786
651
1305
1737
1845
Racine959
731
1040
1778
843
704
1390
1807
1899
Waukesha931
782
996
1720
795
656
1324
1749
1847
Milwaukee
951
786
720
1025
1754
826
686
1370
1782
1873
Hartford
876
779
748
939
1646
740
607
1254
1673
1780
Appleton883
779
743
946
1653
744
612
1260
1682
1787
Green Bay862
760
726
917
1619
709
580
1224
1644
1747
Big Flats​
905
807
928
1673
690
567
1193
1659
1806
Ha​ncock​843
773
790
870
1589
647
524
1138
1583
1725
P​t Edwards833
774
855
1583
623​
505
1121
1574
1723
La Crosse969
939
959
1032
1800
810
676
1353
1817
1942
Eau Claire881
900
826
920
1649
696
578
1213
1657
1787
Cumberland
718
728
696
744
1401
539
433
1005
1408
1545
Bayfield559
607
562
1142
374
297
748
1126
1273
Wausau703
696
732
722
1390
512
403
976
1390
1534
Medford
682
674
661
694
1349
483
377
937
1348
1497
Crivitz749
705
751
1428
519
415
979
1410
1559
Crandon601
635
607
1228
404
311
811
1209
1369​​
​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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