HEADQUARTERS, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(104150) HEADQUARTERS
From Year=1959 To Year=2010
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	1	17	91	285	495	712	682	408	139	17	0	2848
40 S	0	2	19	109	395	889	1602	2284	2691	2830	2848	2848	2848
45 M	0	0	2	36	165	349	557	527	269	57	2	0	1964
45 S	0	0	2	39	203	552	1109	1636	1905	1962	1964	1964	1964
50 M	0	0	0	12	80	215	404	375	154	17	0	0	1256
50 S	0	0	0	12	92	307	710	1085	1239	1256	1256	1256	1256
55 M	0	0	0	3	31	110	258	233	72	3	0	0	710
55 S	0	0	0	3	34	144	402	635	707	710	710	710	710
60 M	0	0	0	1	9	44	136	116	24	0	0	0	329
60 S	0	0	0	1	9	54	189	305	329	329	329	329	329

Corn Growing Degree Days
50 M	0	4	26	86	209	314	467	457	303	126	15	0	2008
50 S	0	5	30	116	325	639	1107	1563	1867	1992	2008	2008	2008

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