CLARKSVILLE 3 NNE, MARYLAND

Period of Record General Climate Summary - Heating Degree Days

From Year=1967 To Year=2004
Station:(181862) CLARKSVILLE 3 NNE
Averages Daily Extremes
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1042	859	680	384	136	21	1	7	64	322	603	905	5025
60	887	718	530	253	59	4	0	1	22	197	458	750	3879
57	794	634	443	184	30	1	0	0	10	136	374	658	3264
55	733	578	386	144	17	0	0	0	5	102	322	598	2885
50	581	442	255	64	3	0	0	0	0	41	203	449	2039

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 May 22,
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Southeast Regional Climate Center, SERCC Webmaster