ELK CITY RANGER STN, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(102875) ELK CITY RANGER STN
From Year=1950 To Year=2006
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	13	78	251	447	648	616	375	140	12	0	2583
40 S	1	2	15	94	345	791	1439	2056	2431	2571	2583	2583	2583
45 M	0	0	1	28	137	303	493	462	238	59	1	0	1722
45 S	0	0	1	29	167	470	963	1425	1662	1721	1722	1722	1722
50 M	0	0	0	7	61	177	340	310	123	16	0	0	1034
50 S	0	0	0	7	68	245	586	896	1018	1034	1034	1034	1034
55 M	0	0	0	1	20	84	199	171	45	2	0	0	521
55 S	0	0	0	1	21	105	303	475	519	521	521	521	521
60 M	0	0	0	0	4	29	86	68	10	0	0	0	197
60 S	0	0	0	0	4	33	119	187	196	197	197	197	197

Corn Growing Degree Days
50 M	1	9	35	94	204	310	464	462	332	169	20	1	2100
50 S	1	10	45	139	343	653	1116	1578	1911	2080	2100	2100	2100

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 Jul 28, 2006
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