EPHRATA MUNI AP, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(452614) EPHRATA AIRPORT FCWOS
From Year=1949 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	6	22	125	326	621	830	1089	1041	744	358	57	6	5225
40 S	6	27	153	479	1100	1930	3019	4061	4804	5162	5219	5225	5225
45 M	1	4	43	190	466	680	934	886	594	220	15	1	4034
45 S	1	5	47	238	704	1384	2318	3204	3798	4018	4033	4034	4034
50 M	0	0	8	90	317	530	779	731	445	111	3	0	3014
50 S	0	0	9	99	416	946	1725	2456	2901	3012	3014	3014	3014
55 M	0	0	1	33	187	381	624	577	302	43	0	0	2148
55 S	0	0	1	34	221	602	1226	1802	2105	2148	2148	2148	2148
60 M	0	0	0	9	94	242	470	422	177	13	0	0	1428
60 S	0	0	0	9	103	345	815	1237	1415	1428	1428	1428	1428

Corn Growing Degree Days
50 M	2	11	74	195	372	521	703	672	462	206	23	2	3242
50 S	2	13	87	282	654	1175	1878	2550	3012	3217	3240	3242	3242

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