THE DALLES, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(358407) THE DALLES
From Year=1948 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	40	84	221	412	654	833	1045	1031	794	471	158	46	5789
40 S	40	124	345	757	1411	2244	3289	4320	5113	5584	5743	5789	5789
45 M	9	23	97	265	499	683	890	876	644	318	65	11	4379
45 S	9	32	128	393	892	1575	2466	3341	3985	4303	4368	4379	4379
50 M	1	3	26	137	346	533	735	721	494	181	16	2	3197
50 S	1	4	31	168	514	1047	1783	2504	2998	3179	3195	3197	3197
55 M	0	0	5	56	207	384	580	566	346	81	2	0	2228
55 S	0	0	5	61	268	652	1233	1798	2145	2226	2228	2228	2228
60 M	0	0	0	17	105	243	426	411	209	27	0	0	1440
60 S	0	0	0	17	122	365	792	1203	1412	1440	1440	1440	1440

Corn Growing Degree Days
50 M	15	41	124	236	382	511	660	651	491	282	67	15	3474
50 S	15	55	180	416	797	1308	1968	2619	3109	3392	3458	3474	3474

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 Jul 28, 2006
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