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Growing Degree Days

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Accumulations January 1 to September 1​​​, 2021​​​​​​​​​


​Location
​Mod 50°F
Corn development, 
Codling moth, 
European corn borer​​
​2020 GDDs
​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
2879270624373132437327932519386045114706
Lone Rock25692414 2782402524192163343841194342
Beloit2682252724212909415625542289359342674475
Sullivan25832354 2799403124452185345141264345
Madison2662248124012885412025362275356542334442
Juneau24392254 2638384722842034327239394155
Racine24762319 2704390823902132337040214222
Waukesha25082387 2724394323852128337740444257
Milwaukee2563237423202800401024812225347741284330
Hartford2390222021452588379622431994322038874104
Appleton2466233622402679389423412087333139984206
Green Bay2438229721552647385423072061328639534166
Big Flats24132254 2606384222421992322739184154
Hancock2304216122242491371321361890310037894020
Port Edwards23162157 2493372421321887309237894032
La Crosse2575247026212777402424192163342941194345
Eau Claire2644245523132854408225042249351341764400
Cumberland2057196220942226338119011672278534493671
Bayfield19061839 2035312417171494256131843404
Wausau2090190021342263344719321698284435153745
Medford1946182819552093326717601529264633223562
Crivitz22012087 2366354520271795293736103844
Crandon19401849 2093324217721546264933033534
​Key to G DD calculation methods: Modified B50°F; 2020 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   ​ ​ ​ ​ ​ ​ ​ ​ ​ ​