PLAIN, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(456534) PLAIN
From Year=1937 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	1	3	33	152	382	557	775	744	503	202	19	1	3372
40 S	1	4	37	188	571	1128	1902	2646	3150	3352	3371	3372	3372
45 M	0	0	6	59	237	407	620	589	355	94	3	0	2369
45 S	0	0	6	65	302	709	1329	1918	2272	2366	2369	2369	2369
50 M	0	0	0	16	119	261	465	434	215	32	0	0	1542
50 S	0	0	0	16	135	396	860	1295	1510	1542	1542	1542	1542
55 M	0	0	0	3	45	136	312	283	104	7	0	0	891
55 S	0	0	0	3	48	185	497	780	884	891	891	891	891
60 M	0	0	0	0	12	55	176	149	34	1	0	0	428
60 S	0	0	0	0	13	68	245	394	428	428	428	428	428

Corn Growing Degree Days
50 M	1	4	39	131	265	353	491	479	356	156	9	0	2287
50 S	1	5	44	175	441	794	1286	1765	2120	2277	2286	2287	2287

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