WHITMAN MISSION, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(459200) WHITMAN MISSION
From Year=1962 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	49	68	180	324	558	750	964	931	647	335	115	50	4970
40 S	49	117	297	621	1179	1929	2892	3824	4471	4805	4920	4970	4970
45 M	16	23	76	187	403	600	809	776	497	197	47	17	3648
45 S	16	39	115	302	705	1305	2114	2890	3387	3584	3631	3648	3648
50 M	4	5	23	85	256	450	654	621	351	93	14	4	2561
50 S	4	9	32	117	373	823	1477	2098	2449	2543	2557	2561	2561
55 M	0	1	5	30	136	303	499	467	215	34	3	0	1692
55 S	0	1	6	36	171	474	973	1440	1654	1689	1692	1692	1692
60 M	0	0	1	8	58	173	346	315	107	7	0	0	1014
60 S	0	0	1	8	66	239	585	900	1006	1014	1014	1014	1014

Corn Growing Degree Days
50 M	22	40	119	211	352	466	590	576	438	250	60	23	3148
50 S	22	62	181	392	744	1210	1800	2377	2815	3065	3125	3148	3148

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