EUGENE MAHLON SWEET AP, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(352709) EUGENE WSO AIRPORT
From Year=1939 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	775	616	580	448	302	148	36	34	116	370	594	753	4775
60	620	475	426	300	165	50	4	3	35	223	444	598	3344
57	528	390	333	216	98	18	0	0	13	145	355	506	2602
55	466	335	273	164	63	7	0	0	5	102	297	444	2155
50	317	200	135	60	11	0	0	0	0	31	166	295	1215

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 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