ARLINGTON, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(450257) ARLINGTON
From Year=1922 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	48	83	121	249	385	524	680	689	635	428	112	50	4003
40 S	48	131	252	500	885	1409	2089	2778	3413	3841	3953	4003	4003
45 M	11	20	29	123	231	374	525	534	485	277	37	13	2658
45 S	11	31	60	184	415	788	1313	1847	2332	2609	2645	2658	2658
50 M	1	2	3	50	96	225	370	379	335	159	4	2	1625
50 S	1	3	6	56	152	377	747	1126	1461	1620	1624	1625	1625
55 M	0	0	0	14	22	96	217	225	190	109	0	0	873
55 S	0	0	0	14	35	132	349	573	763	872	873	873	873
60 M	0	0	0	2	3	26	89	87	82	100	0	0	389
60 S	0	0	0	2	5	31	120	208	290	389	389	389	389

Corn Growing Degree Days
50 M	12	42	52	140	198	281	386	388	393	389	58	12	2350
50 S	12	53	105	245	444	724	1110	1498	1891	2281	2339	2350	2350

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