SAINT MARIES, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(108062) SAINT MARIES
From Year=1897 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	4	11	63	213	445	625	846	808	540	250	38	6	3848
40 S	4	15	78	291	736	1361	2207	3015	3554	3804	3842	3848	3848
45 M	0	1	17	106	296	475	691	653	392	130	8	1	2769
45 S	0	1	18	124	420	895	1586	2239	2630	2760	2768	2769	2769
50 M	0	0	2	43	167	327	536	498	253	52	1	0	1880
50 S	0	0	2	45	213	540	1076	1574	1827	1879	1880	1880	1880
55 M	0	0	0	13	77	194	382	345	136	14	0	0	1161
55 S	0	0	0	14	90	284	666	1011	1148	1161	1161	1161	1161
60 M	0	0	0	3	27	92	237	203	56	2	0	0	620
60 S	0	0	0	3	30	122	359	562	618	620	620	620	620

Corn Growing Degree Days
50 M	1	7	49	150	283	384	529	513	360	169	16	1	2462
50 S	1	8	57	207	490	874	1403	1916	2275	2444	2460	2462	2462

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