BRITTON, SOUTH DAKOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(391049) BRITTON
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	34	211	537	799	1009	958	621	290	36	1	4498
40 S	0	2	36	248	785	1584	2592	3550	4171	4461	4497	4498	4498
45 M	0	0	14	125	392	649	854	803	476	182	13	0	3509
45 S	0	0	15	140	532	1181	2035	2838	3313	3495	3509	3509	3509
50 M	0	0	5	66	263	500	699	648	339	101	4	0	2625
50 S	0	0	5	72	335	835	1533	2181	2520	2622	2625	2625	2625
55 M	0	0	2	31	156	356	544	494	221	48	1	0	1851
55 S	0	0	2	33	189	544	1088	1582	1802	1850	1851	1851	1851
60 M	0	0	0	12	81	224	391	344	128	19	0	0	1199
60 S	0	0	0	12	93	316	707	1052	1180	1199	1199	1199	1199

Corn Growing Degree Days
50 M	0	2	27	145	337	508	662	624	393	191	28	1	2919
50 S	0	2	29	174	511	1019	1681	2305	2698	2890	2917	2919	2919

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