date! ,

Period of Record General Climate Summary - Heating Degree Days

Station:(216654) PRESTON
From Year=1952 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	1575	1283	1044	583	277	67	15	37	197	517	934	1395	7926
60	1420	1142	891	441	165	23	2	9	104	374	784	1240	6595
57	1327	1057	799	360	111	10	0	3	64	296	695	1147	5871
55	1265	1001	738	310	82	5	0	1	44	248	636	1086	5417
50	1110	860	590	196	33	1	0	0	14	144	492	931	4370

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