OWATONNA, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(216287) OWATONNA
From Year=1961 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	3	52	236	578	855	1013	935	647	318	55	3	4694
40 S	0	3	54	290	868	1723	2736	3671	4318	4636	4691	4694	4694
45 M	0	1	25	140	429	705	858	780	499	203	24	1	3665
45 S	0	1	26	166	595	1300	2158	2937	3436	3639	3664	3665	3665
50 M	0	0	11	74	292	555	703	625	357	115	8	0	2741
50 S	0	0	11	85	377	933	1635	2260	2617	2732	2740	2741	2741
55 M	0	0	4	35	177	408	548	470	230	57	2	0	1931
55 S	0	0	4	39	216	624	1172	1642	1872	1929	1931	1931	1931
60 M	0	0	1	15	96	269	393	319	130	24	0	0	1246
60 S	0	0	1	16	111	380	773	1092	1222	1246	1246	1246	1246

Corn Growing Degree Days
50 M	0	2	34	150	351	553	679	616	400	192	32	2	3010
50 S	0	2	36	186	537	1090	1768	2384	2785	2977	3009	3010	3010

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