MAYFIELD PWR PLT, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(455110) MAYFIELD POWER PLANT
From Year=1980 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	58	59	122	277	433	538	739	845	692	365	80	28	4233
40 S	58	117	238	515	948	1485	2224	3068	3760	4125	4205	4233	4233
45 M	11	9	32	151	278	388	584	690	542	215	17	6	2921
45 S	11	20	52	203	481	868	1452	2141	2683	2898	2915	2921	2921
50 M	0	0	2	76	142	238	429	535	392	92	0	0	1904
50 S	0	0	2	78	220	457	886	1421	1812	1904	1904	1904	1904
55 M	0	0	0	32	52	105	275	380	242	21	0	0	1106
55 S	0	0	0	32	84	189	464	844	1086	1106	1106	1106	1106
60 M	0	0	0	11	15	26	136	225	120	1	0	0	534
60 S	0	0	0	11	26	52	188	414	533	534	534	534	534

Corn Growing Degree Days
50 M	14	20	46	156	254	290	445	515	427	190	33	7	2395
50 S	14	34	79	235	489	779	1224	1739	2165	2355	2388	2395	2395

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