PROSSER, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(456768) PROSSER 4 NE
From Year=1925 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	24	45	166	338	585	761	976	937	674	372	88	27	4993
40 S	24	69	234	573	1158	1919	2896	3832	4506	4878	4966	4993	4993
45 M	6	12	68	201	430	611	821	782	524	229	30	7	3721
45 S	6	17	85	286	716	1328	2149	2931	3455	3684	3714	3721	3721
50 M	1	2	20	97	282	461	666	627	376	114	7	1	2657
50 S	1	3	23	121	403	864	1531	2157	2534	2648	2655	2657	2657
55 M	0	0	4	37	158	314	512	472	238	44	1	0	1780
55 S	0	0	4	41	199	513	1025	1497	1735	1779	1780	1780	1780
60 M	0	0	0	10	73	184	359	320	124	12	0	0	1082
60 S	0	0	0	10	83	267	626	946	1070	1082	1082	1082	1082

Corn Growing Degree Days
50 M	11	26	112	226	369	477	608	586	429	236	45	11	3135
50 S	11	36	148	374	743	1220	1828	2414	2842	3079	3123	3135	3135

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