RIGGINS, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(107706) RIGGINS
From Year=1896 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	28	73	191	368	599	783	1080	1064	758	437	127	34	5543
40 S	28	101	293	661	1259	2042	3123	4187	4945	5382	5509	5543	5543
45 M	5	20	88	228	445	633	925	909	608	290	49	8	4209
45 S	5	25	113	341	786	1419	2345	3254	3862	4152	4201	4209	4209
50 M	0	3	29	119	299	484	770	754	460	164	12	1	3096
50 S	0	4	33	152	451	935	1705	2459	2919	3083	3095	3096	3096
55 M	0	0	7	50	176	339	615	599	318	75	2	0	2182
55 S	0	0	7	57	233	572	1187	1786	2105	2180	2182	2182	2182
60 M	0	0	1	16	87	209	462	446	195	27	0	0	1442
60 S	0	0	1	16	103	312	773	1220	1415	1442	1442	1442	1442

Corn Growing Degree Days
50 M	6	37	119	232	367	481	659	646	470	266	56	8	3348
50 S	6	43	162	394	761	1242	1901	2547	3017	3283	3339	3348	3348

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