PORTALES, NEW MEXICO

Period of Record General Climate Summary - Heating Degree Days

Station:(297008) PORTALES
From Year=1905 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	832	639	489	233	59	4	0	1	29	204	541	810	3841
60	677	498	341	126	21	1	0	0	10	104	393	656	2826
57	584	415	260	81	10	0	0	0	5	64	309	563	2292
55	523	361	212	59	6	0	0	0	3	45	257	502	1967
50	374	236	116	23	1	0	0	0	1	17	148	354	1271

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