REDFIELD, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(397047) REDFIELD
From Year=1897 To Year=1977
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	1	2	43	229	541	820	1042	984	645	314	38	2	4661
40 S	1	3	46	275	816	1636	2678	3662	4307	4621	4659	4661	4661
45 M	0	0	18	138	396	670	887	829	499	199	12	0	3648
45 S	0	0	18	156	552	1222	2109	2938	3437	3636	3648	3648	3648
50 M	0	0	7	74	263	521	732	674	361	111	3	0	2746
50 S	0	0	7	81	344	865	1597	2271	2632	2743	2746	2746	2746
55 M	0	0	2	34	155	376	577	519	238	52	0	0	1954
55 S	0	0	2	36	191	567	1144	1663	1902	1953	1954	1954	1954
60 M	0	0	0	12	77	241	424	368	140	19	0	0	1281
60 S	0	0	0	12	90	331	755	1123	1263	1281	1281	1281	1281

Corn Growing Degree Days
50 M	2	5	40	165	341	516	672	631	413	221	42	4	3052
50 S	2	7	47	212	553	1069	1740	2372	2785	3006	3048	3052	3052

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