SEWARD 8 NW, ALASKA

Period of Record General Climate Summary - Growing Degree Days

Station:(508375) SEWARD 9 NW
From Year=1983 To Year=2012
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	1	10	136	336	465	396	195	24	1	0	1563
40 S	0	0	1	11	147	482	947	1343	1537	1562	1563	1563	1563
45 M	0	0	0	0	44	188	310	242	76	3	0	0	863
45 S	0	0	0	0	45	233	542	784	860	863	863	863	863
50 M	0	0	0	0	10	67	158	100	13	0	0	0	347
50 S	0	0	0	0	10	77	234	334	347	347	347	347	347
55 M	0	0	0	0	1	13	44	22	1	0	0	0	80
55 S	0	0	0	0	1	14	58	80	80	80	80	80	80
60 M	0	0	0	0	0	1	5	3	0	0	0	0	9
60 S	0	0	0	0	0	1	6	9	9	9	9	9	9

Corn Growing Degree Days
50 M	0	0	0	12	102	199	253	223	103	8	0	0	901
50 S	0	0	0	13	115	314	567	790	893	901	901	901	901

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 Oct 31, 2012
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