RIMROCK TIETON DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457038) RIMROCK TIETON DAM
From Year=1917 To Year=1977
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	3	4	24	124	309	493	718	681	462	199	22	5	3044
40 S	3	7	31	155	464	957	1675	2356	2818	3017	3038	3044	3044
45 M	0	0	5	50	179	344	564	526	318	95	4	1	2086
45 S	0	1	5	55	235	579	1142	1668	1986	2081	2085	2086	2086
50 M	0	0	0	16	88	209	410	372	189	34	0	0	1319
50 S	0	0	0	16	103	313	723	1095	1284	1318	1319	1319	1319
55 M	0	0	0	3	34	107	264	229	92	8	0	0	737
55 S	0	0	0	3	37	144	408	637	729	737	737	737	737
60 M	0	0	0	0	9	44	141	113	32	1	0	0	341
60 S	0	0	0	0	10	54	195	308	340	341	341	341	341

Corn Growing Degree Days
50 M	1	4	25	94	204	299	454	435	309	142	14	2	1981
50 S	1	5	30	124	327	626	1080	1515	1823	1965	1979	1981	1981

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