CLARK, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(391739) CLARK
From Year=1893 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	2	35	200	505	766	977	921	600	278	35	1	4320
40 S	0	2	37	237	742	1508	2484	3406	4006	4284	4319	4320	4320
45 M	0	0	14	117	363	616	822	766	455	171	12	0	3335
45 S	0	0	14	131	494	1110	1931	2698	3152	3323	3335	3335	3335
50 M	0	0	5	60	236	467	667	611	319	91	3	0	2460
50 S	0	0	5	65	302	769	1436	2047	2366	2457	2460	2460	2460
55 M	0	0	2	26	135	324	512	457	201	40	0	0	1697
55 S	0	0	2	28	162	487	999	1456	1657	1697	1697	1697	1697
60 M	0	0	0	9	65	197	360	309	111	14	0	0	1064
60 S	0	0	0	9	74	270	630	939	1050	1064	1064	1064	1064

Corn Growing Degree Days
50 M	1	2	30	139	308	478	638	595	373	182	29	1	2776
50 S	1	3	33	172	480	958	1596	2191	2563	2745	2775	2776	2776

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