COUNCIL, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(102187) COUNCIL
From Year=1948 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	6	59	248	509	731	1020	977	645	308	49	3	4557
40 S	1	7	66	314	823	1554	2574	3551	4196	4504	4554	4557	4557
45 M	0	1	17	131	359	581	865	822	496	178	12	0	3461
45 S	0	1	18	149	507	1088	1953	2775	3271	3449	3461	3461	3461
50 M	0	0	3	53	225	433	710	667	353	84	1	0	2529
50 S	0	0	3	57	281	714	1424	2091	2443	2527	2529	2529	2529
55 M	0	0	0	15	118	292	555	513	223	29	0	0	1746
55 S	0	0	0	16	134	426	981	1494	1717	1746	1746	1746	1746
60 M	0	0	0	3	50	172	402	363	118	7	0	0	1116
60 S	0	0	0	3	54	226	628	991	1109	1116	1116	1116	1116

Corn Growing Degree Days
50 M	0	6	45	179	338	461	630	602	429	238	37	1	2966
50 S	0	6	51	230	568	1029	1659	2261	2691	2929	2966	2966	2966

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