WAPATO, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(458959) WAPATO
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	20	50	179	378	647	835	1059	1012	727	376	87	18	5390
40 S	20	70	249	628	1275	2110	3169	4181	4908	5285	5372	5390	5390
45 M	4	13	75	236	493	685	904	857	577	233	28	4	4109
45 S	4	17	92	328	820	1505	2410	3266	3844	4076	4105	4109	4109
50 M	1	2	21	121	342	535	749	702	428	116	7	1	3025
50 S	1	3	24	145	487	1022	1771	2473	2901	3018	3024	3025	3025
55 M	0	0	5	51	209	386	594	547	285	46	1	0	2124
55 S	0	0	5	56	264	651	1245	1792	2077	2122	2124	2124	2124
60 M	0	0	0	16	109	248	441	393	159	12	0	0	1379
60 S	0	0	0	16	125	373	814	1207	1367	1379	1379	1379	1379

Corn Growing Degree Days
50 M	11	35	122	242	405	528	673	644	463	256	51	9	3440
50 S	11	46	168	410	815	1343	2016	2661	3124	3380	3431	3440	3440

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 Jul 28, 2006
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