SKWENTNA, ALASKA

Period of Record General Climate Summary - Growing Degree Days

Station:(508536) SKWENTNA
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	0	0	0	14	189	456	571	473	195	15	0	0	1912
40 S	0	0	0	14	203	659	1229	1702	1897	1912	1912	1912	1912
45 M	0	0	0	1	80	307	416	318	84	2	0	0	1208
45 S	0	0	0	1	81	388	804	1122	1206	1208	1208	1208	1208
50 M	0	0	0	0	25	167	261	170	19	0	0	0	643
50 S	0	0	0	0	25	193	454	624	643	643	643	643	643
55 M	0	0	0	0	5	67	120	57	1	0	0	0	250
55 S	0	0	0	0	5	72	192	249	250	250	250	250	250
60 M	0	0	0	0	1	18	35	9	0	0	0	0	62
60 S	0	0	0	0	1	19	53	62	62	62	62	62	62

Corn Growing Degree Days
50 M	0	0	0	13	128	259	312	247	97	4	0	0	1061
50 S	0	0	0	13	142	401	713	960	1057	1061	1061	1061	1061

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