FORT YUKON, ALASKA

Period of Record General Climate Summary - Growing Degree Days

Station:(503175) FORT YUKON
From Year=1938 To Year=1990
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	7	190	582	688	480	117	1	0	0	2065
40 S	0	0	0	7	197	779	1467	1947	2065	2065	2065	2065	2065
45 M	0	0	0	1	95	433	533	330	51	0	0	0	1443
45 S	0	0	0	1	96	529	1062	1392	1443	1443	1443	1443	1443
50 M	0	0	0	0	37	288	379	192	17	0	0	0	914
50 S	0	0	0	0	38	326	705	897	914	914	914	914	914
55 M	0	0	0	0	11	158	232	83	3	0	0	0	488
55 S	0	0	0	0	11	170	401	484	488	488	488	488	488
60 M	0	0	0	0	3	65	108	22	0	0	0	0	197
60 S	0	0	0	0	3	67	175	197	197	197	197	197	197

Corn Growing Degree Days
50 M	0	0	0	8	124	337	402	262	62	0	0	0	1194
50 S	0	0	0	8	131	468	869	1132	1193	1194	1194	1194	1194

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