POMEROY, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(456610) POMEROY
From Year=1891 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	35	49	129	283	502	697	943	913	646	356	99	40	4692
40 S	35	83	213	496	998	1695	2639	3551	4197	4553	4652	4692	4692
45 M	8	14	52	159	350	547	788	758	496	219	38	11	3441
45 S	8	23	74	233	583	1131	1919	2677	3173	3392	3430	3441	3441
50 M	1	3	15	75	215	399	633	603	351	112	10	2	2418
50 S	1	4	19	94	308	707	1340	1943	2294	2406	2416	2418	2418
55 M	0	0	3	29	112	258	479	448	220	45	2	0	1596
55 S	0	0	3	32	144	402	881	1329	1549	1594	1596	1596	1596
60 M	0	0	0	9	49	143	328	300	116	13	0	0	959
60 S	0	0	0	9	58	200	529	829	945	958	959	959	959

Corn Growing Degree Days
50 M	12	22	74	169	301	426	589	573	411	227	46	14	2863
50 S	12	34	108	277	578	1004	1593	2165	2576	2803	2849	2863	2863

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