MARIETTA 3 NNW, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(455028) MARIETTA 3 NNW
From Year=1913 To Year=1958
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	55	70	137	274	452	585	694	685	515	331	138	74	4011
40 S	55	125	262	536	989	1573	2267	2952	3468	3798	3937	4011	4011
45 M	11	17	41	135	297	435	539	530	366	186	47	19	2622
45 S	11	28	69	204	501	936	1475	2005	2370	2556	2603	2622	2622
50 M	1	1	7	40	151	285	384	375	218	71	7	2	1541
50 S	1	2	9	49	200	485	869	1244	1462	1533	1540	1541	1541
55 M	0	0	1	6	46	143	230	220	89	13	0	0	750
55 S	0	0	1	7	53	197	426	647	736	749	750	750	750
60 M	0	0	0	0	7	44	89	80	18	1	0	0	240
60 S	0	0	0	0	7	51	140	220	239	240	240	240	240

Corn Growing Degree Days
50 M	12	24	60	143	245	320	404	403	293	164	47	15	2130
50 S	12	35	95	239	484	804	1208	1611	1904	2068	2115	2130	2130

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