SANDPOINT EXP STN, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(108137) SANDPOINT EXPERMNT STN
From Year=1910 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	1	3	33	181	411	586	788	745	475	190	22	4	3440
40 S	1	5	38	219	629	1216	2004	2749	3225	3414	3436	3440	3440
45 M	0	0	6	82	263	437	633	591	328	83	4	0	2427
45 S	0	0	6	87	350	787	1420	2011	2339	2422	2426	2427	2427
50 M	0	0	0	27	140	291	478	436	194	25	0	0	1593
50 S	0	0	0	28	168	459	937	1373	1567	1592	1593	1593	1593
55 M	0	0	0	7	58	161	325	284	90	4	0	0	930
55 S	0	0	0	7	65	226	551	836	926	930	930	930	930
60 M	0	0	0	1	17	69	183	149	29	0	0	0	448
60 S	0	0	0	1	18	87	270	419	448	448	448	448	448

Corn Growing Degree Days
50 M	0	1	24	120	256	359	505	486	314	122	6	1	2193
50 S	0	1	25	145	401	760	1265	1751	2065	2187	2193	2193	2193

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