HAWAII VOL NP HQ 54, HAWAII

Period of Record General Climate Summary - Heating Degree Days

Station:(511303) HAWAII VOLCNS NP HQ 54
From Year=1949 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	206	192	201	171	133	91	66	50	53	69	117	181	1528
60	63	63	60	41	20	5	3	2	1	3	16	48	326
57	15	18	15	8	2	0	0	0	0	0	2	11	72
55	4	6	4	1	0	0	0	0	0	0	0	3	18
50	0	0	0	0	0	0	0	0	0	0	0	0	0

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