WAPATO, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(458959) WAPATO
From Year=1915 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	19	45	183	381	641	823	1064	1009	726	389	84	22	5386
40 S	19	64	247	628	1269	2092	3156	4165	4891	5280	5364	5386	5386
45 M	4	11	78	239	486	673	909	854	576	244	27	6	4109
45 S	4	15	94	333	819	1492	2401	3255	3831	4076	4103	4109	4109
50 M	1	2	24	126	335	523	754	699	427	125	6	1	3023
50 S	1	3	26	152	487	1010	1765	2463	2891	3015	3022	3023	3023
55 M	0	0	5	54	203	374	600	544	284	49	1	0	2114
55 S	0	0	6	60	263	637	1237	1781	2065	2113	2114	2114	2114
60 M	0	0	1	18	105	236	446	390	159	13	0	0	1368
60 S	0	0	1	19	124	360	806	1196	1355	1368	1368	1368	1368

Corn Growing Degree Days
50 M	11	33	126	244	399	519	680	643	461	260	52	11	3439
50 S	11	44	170	413	812	1331	2011	2654	3115	3376	3427	3439	3439

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