MC MILLIN RSVR, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(455224) MC MILLIN RESERVOIR
From Year=1941 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	58	74	132	238	422	553	715	720	556	332	132	63	3994
40 S	58	132	264	503	925	1478	2193	2912	3468	3799	3932	3994	3994
45 M	15	18	42	112	269	403	560	565	406	187	48	16	2641
45 S	15	33	75	187	457	859	1419	1984	2390	2576	2625	2641	2641
50 M	2	2	8	38	136	254	405	410	258	76	9	2	1601
50 S	2	4	12	50	187	441	846	1255	1513	1590	1599	1601	1601
55 M	0	0	1	9	53	123	251	256	126	20	1	0	839
55 S	0	0	1	10	64	186	438	694	819	839	839	839	839
60 M	0	0	0	1	15	44	118	118	41	3	0	0	340
60 S	0	0	0	1	17	61	179	296	337	340	340	340	340

Corn Growing Degree Days
50 M	13	25	59	119	221	295	420	426	311	159	41	13	2101
50 S	13	38	97	216	437	732	1152	1577	1888	2047	2088	2101	2101

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