AMCHITKA, ALASKA

Period of Record General Climate Summary - Growing Degree Days

Station:(500252) AMCHITKA
From Year=1949 To Year=1993
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	1	0	0	4	75	171	239	155	67	9	1	720
40 S	0	1	1	1	5	80	251	490	644	711	720	720	720
45 M	0	0	0	0	0	2	28	85	26	3	0	0	144
45 S	0	0	0	0	0	2	30	116	141	144	144	144	144
50 M	0	0	0	0	0	0	1	5	0	0	0	0	5
50 S	0	0	0	0	0	0	1	5	5	5	5	5	5
55 M	0	0	0	0	0	0	0	0	0	0	0	0	0
55 S	0	0	0	0	0	0	0	0	0	0	0	0	0
60 M	0	0	0	0	0	0	0	0	0	0	0	0	0
60 S	0	0	0	0	0	0	0	0	0	0	0	0	0

Corn Growing Degree Days
50 M	0	0	0	0	0	2	8	25	6	1	0	0	41
50 S	0	0	0	0	0	2	10	35	41	41	41	41	41

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