PRIEST RIVER EXP STN, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(107386) PRIEST RIVER EXP STN
From Year=1898 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	0	1	17	137	376	553	760	719	444	157	12	1	3176
40 S	0	1	18	155	531	1084	1844	2563	3006	3163	3175	3176	3176
45 M	0	0	2	56	233	403	605	564	299	66	2	0	2228
45 S	0	0	2	57	290	693	1298	1862	2160	2226	2227	2228	2228
50 M	0	0	0	17	118	259	450	409	170	18	0	0	1441
50 S	0	0	0	17	135	394	843	1253	1423	1441	1441	1441	1441
55 M	0	0	0	4	46	135	298	260	75	3	0	0	821
55 S	0	0	0	4	50	185	483	743	818	821	821	821	821
60 M	0	0	0	1	12	53	162	130	21	0	0	0	379
60 S	0	0	0	1	13	66	228	357	379	379	379	379	379

Corn Growing Degree Days
50 M	0	1	22	121	262	355	495	480	317	112	3	0	2168
50 S	0	1	23	144	406	761	1256	1736	2053	2165	2167	2168	2168

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