LOWER MONUMENTAL DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(454841) LOWER MONUMENTAL DAM
From Year=1962 To Year=2007
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	80	203	371	647	866	1126	1109	805	461	141	49	5898
40 S	40	119	322	693	1340	2206	3332	4441	5247	5708	5849	5898	5898
45 M	9	22	88	223	492	716	971	954	655	310	52	10	4503
45 S	9	32	119	343	835	1551	2522	3476	4131	4441	4493	4503	4503
50 M	1	3	28	102	339	566	816	799	506	174	11	1	3344
50 S	1	4	32	134	472	1039	1854	2653	3159	3333	3343	3344	3344
55 M	0	0	5	33	201	417	661	644	359	75	1	0	2397
55 S	0	0	5	38	239	656	1317	1961	2320	2395	2397	2397	2397
60 M	0	0	0	7	99	274	506	489	223	25	0	0	1624
60 S	0	0	0	8	106	381	887	1376	1599	1624	1624	1624	1624

Corn Growing Degree Days
50 M	11	38	111	206	382	536	714	699	499	273	52	12	3532
50 S	11	50	160	366	748	1283	1997	2696	3195	3468	3520	3532	3532

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