ADAK, ALASKA

Period of Record General Climate Summary - Growing Degree Days

Station:(500026) ADAK
From Year=1949 To Year=1996
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	3	1	2	8	47	150	290	348	239	94	16	4	1202
40 S	3	5	6	14	61	211	501	848	1087	1181	1198	1202	1202
45 M	0	0	0	0	4	30	137	193	96	16	2	0	477
45 S	0	0	0	0	4	34	170	363	460	475	477	477	477
50 M	0	0	0	0	0	2	30	58	13	1	0	0	105
50 S	0	0	0	0	0	2	32	90	104	104	105	105	105
55 M	0	0	0	0	0	0	5	11	1	0	0	0	17
55 S	0	0	0	0	0	0	5	16	17	17	17	17	17
60 M	0	0	0	0	0	0	1	1	0	0	0	0	2
60 S	0	0	0	0	0	0	1	2	2	2	2	2	2

Corn Growing Degree Days
50 M	0	0	0	0	3	16	68	96	42	7	1	0	232
50 S	0	0	0	0	3	19	86	182	224	230	232	232	232

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 Jul 28, 2006
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