UMIAT, ALASKA

Period of Record General Climate Summary - Growing Degree Days

Station:(509539) UMIAT
From Year=1949 To Year=2001
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	0	11	249	446	254	31	0	0	0	991
40 S	0	0	0	0	11	260	706	960	991	991	991	991	991
45 M	0	0	0	0	3	148	301	145	8	0	0	0	604
45 S	0	0	0	0	3	151	452	597	604	604	604	604	604
50 M	0	0	0	0	0	75	177	67	1	0	0	0	320
50 S	0	0	0	0	0	75	252	319	320	320	320	320	320
55 M	0	0	0	0	0	30	84	23	0	0	0	0	137
55 S	0	0	0	0	0	30	114	137	137	137	137	137	137
60 M	0	0	0	0	0	8	28	6	0	0	0	0	41
60 S	0	0	0	0	0	8	35	41	41	41	41	41	41

Corn Growing Degree Days
50 M	0	0	0	0	8	145	261	145	23	0	0	0	582
50 S	0	0	0	0	8	153	415	559	582	582	582	582	582

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