MELLETTE 4 W, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(395456) MELLETTE
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	39	215	529	795	1011	947	615	281	34	1	4469
40 S	0	2	41	256	785	1580	2591	3538	4153	4434	4469	4469	4469
45 M	0	0	16	126	384	645	856	792	470	173	11	0	3473
45 S	0	0	16	142	525	1170	2026	2818	3288	3462	3473	3473	3473
50 M	0	0	6	66	252	496	701	637	334	93	3	0	2587
50 S	0	0	6	71	323	819	1520	2157	2491	2584	2587	2587	2587
55 M	0	0	2	29	146	351	546	483	215	42	0	0	1815
55 S	0	0	2	31	177	528	1075	1557	1773	1814	1815	1815	1815
60 M	0	0	1	10	72	220	393	334	122	15	0	0	1168
60 S	0	0	1	11	83	304	696	1030	1152	1168	1168	1168	1168

Corn Growing Degree Days
50 M	1	4	38	160	335	501	654	609	395	204	37	2	2941
50 S	1	6	43	203	538	1039	1693	2302	2697	2901	2938	2941	2941

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