RIMROCK TIETON DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457038) RIMROCK TIETON DAM
From Year=1947 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	5	19	101	302	496	707	675	467	181	22	3	2979
40 S	3	7	26	127	429	925	1632	2307	2774	2954	2976	2979	2979
45 M	0	0	3	38	178	348	552	520	322	84	4	0	2049
45 S	0	1	4	41	219	567	1119	1639	1961	2045	2049	2049	2049
50 M	0	0	0	11	89	214	399	366	194	31	0	0	1305
50 S	0	0	0	11	100	314	713	1079	1273	1304	1305	1305	1305
55 M	0	0	0	2	35	111	257	225	96	7	0	0	734
55 S	0	0	0	2	37	148	405	631	727	734	734	734	734
60 M	0	0	0	0	10	47	138	114	35	1	0	0	345
60 S	0	0	0	0	10	57	196	310	345	345	345	345	345

Corn Growing Degree Days
50 M	1	4	20	77	198	298	443	427	315	132	12	1	1929
50 S	1	5	25	102	301	599	1042	1469	1784	1916	1928	1929	1929

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