ALYESKA, ALASKA

Period of Record General Climate Summary - Growing Degree Days

Station:(500243) ALYESKA
From Year=1963 To Year=2006
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	12	160	384	524	464	220	30	3	1	1798
40 S	0	1	1	13	173	557	1081	1545	1764	1794	1798	1798	1798
45 M	0	0	0	2	60	236	369	309	102	5	0	0	1083
45 S	0	0	0	2	61	298	667	976	1077	1083	1083	1083	1083
50 M	0	0	0	0	14	109	216	161	26	1	0	0	527
50 S	0	0	0	0	15	124	340	501	527	527	527	527	527
55 M	0	0	0	0	1	33	87	54	3	0	0	0	178
55 S	0	0	0	0	1	34	121	175	178	178	178	178	178
60 M	0	0	0	0	0	6	20	10	0	0	0	0	36
60 S	0	0	0	0	0	6	25	36	36	36	36	36	36

Corn Growing Degree Days
50 M	0	0	0	6	76	182	251	215	84	5	0	0	820
50 S	0	0	0	6	82	264	516	731	814	820	820	820	820

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