BLOCK ISLAND STATE AP, RHODE ISLAND

Period of Record General Climate Summary - Heating Degree Days

Station:(370896) BLOCK ISLAND STATE AP
From Year=1927 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	1032	937	857	581	331	80	5	8	85	313	559	886	5674
60	877	796	702	431	187	19	0	0	24	178	410	731	4355
57	784	711	609	342	114	5	0	0	8	114	323	638	3649
55	722	655	547	285	74	2	0	0	3	81	268	576	3212
50	567	513	393	151	16	0	0	0	0	26	149	425	2241

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