OROVILLE, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(456187) OROVILLE 1 S
From Year=1960 To Year=1970
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	4	14	92	292	546	777	984	933	642	307	54	4	4648
40 S	4	18	110	402	948	1725	2709	3643	4284	4591	4644	4648	4648
45 M	0	2	29	155	392	627	829	778	492	174	13	0	3491
45 S	0	3	31	186	578	1205	2034	2813	3304	3478	3491	3491	3491
50 M	0	0	6	59	246	477	674	623	343	77	1	0	2507
50 S	0	0	6	65	312	789	1463	2086	2429	2506	2507	2507	2507
55 M	0	0	0	14	127	328	519	468	205	23	0	0	1685
55 S	0	0	0	15	141	469	989	1457	1662	1685	1685	1685	1685
60 M	0	0	0	1	49	188	365	317	97	3	0	0	1021
60 S	0	0	0	1	50	238	603	921	1018	1021	1021	1021	1021

Corn Growing Degree Days
50 M	1	10	78	206	357	495	614	584	420	200	16	0	2980
50 S	1	10	89	294	652	1146	1760	2344	2764	2964	2980	2980	2980

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