SANDPOINT EXPERMNT STN, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(108137) SANDPOINT EXPERMNT STN
From Year=1910 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	4	33	181	411	586	782	744	473	190	22	4	3431
40 S	1	5	38	219	630	1217	1999	2742	3215	3405	3427	3431	3431
45 M	0	0	6	82	263	437	627	589	325	84	4	0	2416
45 S	0	0	6	88	350	787	1414	2003	2328	2412	2416	2416	2416
50 M	0	0	0	27	140	290	472	434	192	25	0	0	1582
50 S	0	0	0	28	168	458	930	1364	1556	1581	1582	1582	1582
55 M	0	0	0	7	58	161	319	283	89	4	0	0	920
55 S	0	0	0	7	64	225	544	827	915	920	920	920	920
60 M	0	0	0	1	17	68	178	148	28	0	0	0	440
60 S	0	0	0	1	18	86	264	412	440	440	440	440	440

Corn Growing Degree Days
50 M	0	1	25	121	256	360	501	485	312	123	5	1	2188
50 S	0	1	26	146	403	762	1263	1748	2060	2182	2188	2188	2188

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