KELSO SOUTHWEST RGNL AP, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(454135) KELSO WB AIRPORT
From Year=1949 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	57	77	121	274	440	568	718	730	620	344	167	85	4200
40 S	57	134	254	528	968	1536	2254	2984	3604	3948	4116	4200	4200
45 M	21	22	29	134	285	418	563	575	472	199	71	21	2808
45 S	21	42	72	205	490	908	1471	2046	2518	2716	2787	2808	2808
50 M	3	2	5	42	144	269	408	420	324	90	14	4	1725
50 S	3	5	9	51	195	464	872	1292	1616	1706	1721	1725	1725
55 M	0	0	1	6	51	130	253	266	186	31	2	1	924
55 S	0	0	1	6	57	186	439	705	890	921	923	924	924
60 M	0	0	0	0	11	44	112	124	76	6	0	0	372
60 S	0	0	0	0	11	55	166	290	366	372	372	372	372

Corn Growing Degree Days
50 M	10	28	52	173	253	320	433	443	386	189	65	12	2364
50 S	10	38	89	263	516	836	1269	1712	2098	2287	2352	2364	2364

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