WHITE SWAN RS, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(459191) WHITE SWAN
From Year=1927 To Year=1981
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	19	37	147	322	558	721	925	878	653	345	73	26	4703
40 S	19	56	203	525	1083	1804	2729	3606	4259	4605	4678	4703	4703
45 M	4	9	58	185	403	571	770	723	503	207	21	7	3462
45 S	4	13	71	257	660	1231	2001	2724	3227	3434	3455	3462	3462
50 M	1	1	16	84	257	421	615	568	355	100	4	2	2424
50 S	1	2	18	102	359	780	1395	1963	2318	2418	2422	2424	2424
55 M	0	0	3	29	138	275	460	413	219	37	0	0	1574
55 S	0	0	3	32	169	444	904	1317	1536	1574	1574	1574	1574
60 M	0	0	0	7	59	150	308	263	109	10	0	0	905
60 S	0	0	0	7	66	215	524	786	896	905	905	905	905

Corn Growing Degree Days
50 M	10	26	107	228	372	460	578	556	432	249	47	14	3079
50 S	10	36	143	371	743	1203	1782	2337	2769	3018	3065	3079	3079

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