WHITEHORSE RCH, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(359290) WHITEHORSE RANCH
From Year=1965 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	18	33	95	193	420	629	901	858	588	304	70	19	4130
40 S	18	51	146	340	760	1389	2290	3149	3737	4041	4110	4130	4130
45 M	4	8	34	100	278	480	746	703	440	181	22	5	3000
45 S	4	11	45	145	423	902	1649	2352	2792	2973	2996	3000	3000
50 M	0	1	8	41	161	335	591	549	301	89	5	1	2081
50 S	0	1	9	50	211	546	1138	1686	1987	2076	2080	2081	2081
55 M	0	0	1	12	78	206	437	396	179	34	1	0	1343
55 S	0	0	1	13	91	297	734	1130	1309	1343	1343	1343	1343
60 M	0	0	0	2	30	106	290	253	85	8	0	0	775
60 S	0	0	0	2	32	138	428	681	766	774	775	775	775

Corn Growing Degree Days
50 M	12	33	88	162	298	414	581	556	410	241	62	14	2872
50 S	12	45	133	296	594	1008	1588	2145	2555	2796	2858	2872	2872

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