HOONAH, ALASKA

Period of Record General Climate Summary - Growing Degree Days

Station:(503695) HOONAH
From Year=1972 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	3	3	4	47	240	418	526	530	328	107	6	3	2215
40 S	3	6	10	57	297	715	1241	1772	2100	2207	2213	2215	2215
45 M	0	0	0	7	109	268	371	375	183	24	0	0	1339
45 S	0	0	0	7	116	384	756	1131	1314	1338	1339	1339	1339
50 M	0	0	0	0	33	127	217	220	60	2	0	0	661
50 S	0	0	0	0	34	161	378	599	659	661	661	661	661
55 M	0	0	0	0	6	38	81	81	7	0	0	0	213
55 S	0	0	0	0	6	44	125	206	213	213	213	213	213
60 M	0	0	0	0	0	8	14	18	0	0	0	0	40
60 S	0	0	0	0	0	8	22	40	40	40	40	40	40

Corn Growing Degree Days
50 M	0	0	1	19	103	177	233	241	111	13	0	0	897
50 S	0	0	1	20	123	300	533	774	885	897	897	897	897

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