SNOQUALMIE FALLS, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457773) SNOQUALMIE FALLS
From Year=1931 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	71	91	145	261	436	561	715	716	543	338	144	76	4098
40 S	71	162	307	568	1004	1566	2280	2997	3540	3877	4022	4098	4098
45 M	20	31	51	129	282	411	560	561	393	193	56	19	2708
45 S	20	51	101	230	513	924	1484	2045	2438	2632	2688	2708	2708
50 M	3	6	12	47	146	262	405	406	246	83	13	2	1632
50 S	3	10	21	69	214	477	882	1288	1534	1617	1630	1632	1632
55 M	0	1	2	13	57	128	251	252	116	23	2	0	846
55 S	0	1	3	16	73	202	453	705	821	844	846	846	846
60 M	0	0	0	3	17	45	116	114	35	4	0	0	334
60 S	0	0	0	3	20	65	180	294	330	334	334	334	334

Corn Growing Degree Days
50 M	16	32	69	139	236	305	422	427	307	164	45	14	2175
50 S	16	48	117	256	491	796	1218	1645	1952	2116	2162	2175	2175

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