PROSSER, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(456763) PROSSER
From Year=1912 To Year=1963
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	32	53	185	392	626	801	1011	950	690	386	99	41	5266
40 S	32	85	270	662	1287	2088	3099	4049	4739	5126	5225	5266	5266
45 M	10	16	81	248	471	651	856	795	540	242	38	14	3961
45 S	10	26	107	355	826	1477	2333	3127	3668	3910	3947	3961	3961
50 M	2	4	25	127	319	501	701	640	392	122	9	3	2844
50 S	2	5	30	157	476	977	1678	2318	2709	2831	2841	2844	2844
55 M	0	1	4	50	184	352	546	485	249	43	1	0	1916
55 S	0	1	5	55	239	592	1138	1623	1871	1914	1916	1916	1916
60 M	0	0	0	13	86	213	392	331	126	9	0	0	1170
60 S	0	0	0	14	99	312	704	1035	1161	1170	1170	1170	1170

Corn Growing Degree Days
50 M	16	32	138	275	407	505	622	588	453	265	60	20	3379
50 S	16	48	186	461	868	1373	1994	2582	3035	3300	3360	3379	3379

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