CASTLEWOOD, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(391519) CASTLEWOOD
From Year=1893 To Year=2011
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	32	191	496	765	959	897	589	265	30	1	4226
40 S	0	2	34	225	721	1486	2445	3342	3931	4196	4226	4226	4226
45 M	0	0	13	110	354	616	804	742	445	161	10	0	3253
45 S	0	0	13	123	477	1093	1896	2638	3083	3243	3253	3253	3253
50 M	0	0	4	55	229	467	649	587	311	84	2	0	2388
50 S	0	0	4	60	289	756	1405	1991	2302	2386	2388	2388	2388
55 M	0	0	1	24	130	325	494	434	196	37	0	0	1641
55 S	0	0	1	25	155	480	974	1408	1604	1640	1641	1641	1641
60 M	0	0	0	8	62	198	342	288	108	12	0	0	1019
60 S	0	0	0	8	71	269	611	898	1007	1019	1019	1019	1019

Corn Growing Degree Days
50 M	1	3	29	140	313	483	624	581	377	189	31	1	2771
50 S	1	3	33	173	485	968	1593	2173	2550	2739	2769	2771	2771

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