BONNEVILLE DAM, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(350897) BONNEVILLE DAM
From Year=1937 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	52	82	185	329	524	662	862	861	706	458	177	63	4961
40 S	52	134	319	649	1172	1834	2696	3557	4263	4721	4898	4961	4961
45 M	12	19	72	187	369	512	707	706	556	305	73	16	3532
45 S	12	31	103	289	658	1171	1877	2584	3139	3444	3516	3532	3532
50 M	1	2	18	81	222	362	552	551	406	165	17	2	2380
50 S	1	3	21	102	324	686	1238	1789	2195	2360	2378	2380	2380
55 M	0	0	2	26	108	218	397	396	259	65	2	0	1474
55 S	0	0	2	28	137	354	751	1147	1407	1472	1474	1474	1474
60 M	0	0	0	5	42	103	245	244	133	17	0	0	789
60 S	0	0	0	5	47	150	395	639	772	788	789	789	789

Corn Growing Degree Days
50 M	10	21	74	152	270	369	537	538	413	212	47	12	2654
50 S	10	30	104	256	526	895	1432	1970	2383	2595	2642	2654	2654

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