WATERVILLE, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(459012) WATERVILLE
From Year=1893 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	1	2	38	186	423	608	856	836	549	226	16	1	3742
40 S	1	3	41	227	650	1258	2114	2950	3500	3726	3741	3742	3742
45 M	0	0	10	88	276	458	701	681	402	116	2	0	2734
45 S	0	0	10	98	374	833	1534	2215	2616	2732	2734	2734	2734
50 M	0	0	2	34	155	311	547	526	263	47	0	0	1884
50 S	0	0	2	36	190	501	1048	1574	1836	1884	1884	1884	1884
55 M	0	0	0	10	72	181	393	373	147	15	0	0	1192
55 S	0	0	0	10	82	263	656	1029	1177	1192	1192	1192	1192
60 M	0	0	0	2	28	87	249	232	68	3	0	0	669
60 S	0	0	0	2	30	117	366	598	666	669	669	669	669

Corn Growing Degree Days
50 M	0	1	24	119	257	368	540	525	340	142	9	0	2325
50 S	0	1	25	145	401	769	1309	1834	2174	2316	2325	2325	2325

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