HEADQUARTERS, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(104150) HEADQUARTERS
From Year=1959 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	0	2	17	92	283	495	705	685	406	144	17	0	2846
40 S	0	2	19	111	394	889	1594	2279	2684	2828	2845	2846	2846
45 M	0	0	2	37	162	348	550	530	267	59	2	0	1958
45 S	0	0	2	39	201	550	1099	1629	1896	1956	1958	1958	1958
50 M	0	0	0	13	77	215	396	378	153	17	0	0	1249
50 S	0	0	0	13	90	305	701	1079	1232	1249	1249	1249	1249
55 M	0	0	0	3	29	110	252	236	72	3	0	0	705
55 S	0	0	0	3	32	143	394	630	702	705	705	705	705
60 M	0	0	0	1	8	44	130	119	23	0	0	0	326
60 S	0	0	0	1	9	53	183	302	325	326	326	326	326

Corn Growing Degree Days
50 M	0	5	26	87	208	315	463	459	301	130	16	0	2010
50 S	0	5	31	119	326	641	1104	1563	1864	1994	2010	2010	2010

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