SNOQUALMIE FALLS, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457773) SNOQUALMIE FALLS
From Year=1898 To Year=2010
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	65	86	147	269	448	578	738	727	544	337	147	72	4159
40 S	65	151	298	567	1015	1593	2331	3058	3603	3940	4087	4159	4159
45 M	17	28	52	136	294	428	583	572	395	193	57	18	2772
45 S	17	45	97	233	527	955	1538	2110	2505	2698	2754	2772	2772
50 M	3	5	13	51	155	279	428	417	247	81	13	2	1696
50 S	3	8	21	72	227	506	934	1352	1599	1681	1694	1696	1696
55 M	0	1	2	14	61	144	274	263	117	22	2	0	900
55 S	0	1	3	17	78	222	496	759	877	899	900	900	900
60 M	0	0	0	3	18	53	135	123	36	4	0	0	372
60 S	0	0	0	3	21	74	210	333	369	372	372	372	372

Corn Growing Degree Days
50 M	13	28	71	145	247	321	442	438	308	159	44	13	2230
50 S	13	42	113	258	505	826	1268	1706	2014	2173	2217	2230	2230

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