UMIAT, ALASKA

Period of Record General Climate Summary - Heating Degree Days

Station:(509539) UMIAT
From Year=1949 To Year=2001
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	2661	2472	2532	1945	1269	533	335	545	937	1697	2214	2636	19775
60	2506	2331	2377	1795	1114	390	202	395	787	1542	2064	2481	17983
57	2413	2246	2284	1705	1021	311	139	310	697	1449	1974	2388	16935
55	2351	2190	2222	1645	959	262	104	257	637	1387	1914	2326	16252
50	2196	2049	2067	1495	804	157	42	146	488	1232	1764	2171	14609

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
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