CLEARWATER, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(451496) CLEARWATER
From Year=1895 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	72	89	137	227	373	479	609	617	519	345	158	80	3704
40 S	72	161	298	525	898	1377	1986	2603	3122	3467	3625	3704	3704
45 M	18	22	42	96	220	329	454	462	369	196	60	20	2287
45 S	18	40	82	178	398	727	1180	1643	2011	2208	2267	2287	2287
50 M	1	3	6	25	91	181	299	307	221	78	10	2	1223
50 S	1	4	10	34	125	306	605	912	1133	1211	1221	1223	1223
55 M	0	0	0	4	24	62	149	156	93	16	0	0	505
55 S	0	0	0	5	29	91	240	396	489	505	505	505	505
60 M	0	0	0	0	5	13	42	44	21	1	0	0	127
60 S	0	0	0	0	6	19	61	105	126	127	127	127	127

Corn Growing Degree Days
50 M	10	28	56	109	187	243	335	346	291	163	43	10	1822
50 S	10	38	94	203	391	633	968	1314	1606	1769	1812	1822	1822

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