UKIAH, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(358726) UKIAH
From Year=1922 To Year=2011
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	10	38	123	278	456	664	624	400	190	33	8	2829
40 S	4	14	52	175	453	909	1573	2198	2598	2788	2821	2829	2829
45 M	0	1	8	50	152	309	509	470	261	90	8	1	1859
45 S	0	2	10	60	212	521	1030	1500	1760	1850	1858	1859	1859
50 M	0	0	1	14	66	176	356	317	142	29	1	0	1104
50 S	0	0	1	15	82	258	614	931	1073	1103	1104	1104	1104
55 M	0	0	0	2	21	80	212	178	59	6	0	0	560
55 S	0	0	0	2	24	104	316	494	554	560	560	560	560
60 M	0	0	0	0	4	28	98	75	17	1	0	0	223
60 S	0	0	0	0	4	32	130	205	222	223	223	223	223

Corn Growing Degree Days
50 M	2	13	49	126	225	334	486	476	355	212	36	4	2319
50 S	2	15	64	191	415	749	1235	1711	2066	2278	2315	2319	2319

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