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Period of Record General Climate Summary - Growing Degree Days

Station:(216276) OTTERTAIL
From Year=1940 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	0	1	22	168	524	786	961	901	570	250	27	1	4211
40 S	0	1	22	190	714	1500	2462	3363	3933	4183	4210	4211	4211
45 M	0	0	8	90	378	636	806	746	424	145	9	0	3243
45 S	0	0	8	98	477	1113	1919	2666	3089	3234	3243	3243	3243
50 M	0	0	3	43	248	487	651	591	287	72	2	0	2384
50 S	0	0	3	45	293	780	1431	2023	2310	2382	2384	2384	2384
55 M	0	0	1	17	142	341	497	437	172	29	0	0	1636
55 S	0	0	1	18	160	501	997	1434	1607	1636	1636	1636	1636
60 M	0	0	0	5	68	207	344	288	90	9	0	0	1012
60 S	0	0	0	5	73	280	624	912	1003	1012	1012	1012	1012

Corn Growing Degree Days
50 M	0	0	15	111	317	497	638	586	337	140	15	0	2658
50 S	0	0	16	127	444	941	1579	2165	2502	2643	2657	2658	2658

M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu