GANN VALLEY 4 NW, SOUTH DAKOTA

Period of Record General Climate Summary - Cooling Degree Days

Station:(393217) GANN VALLEY 4 NW
From Year=1897 To Year=2009
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	0	0	3	36	164	394	615	563	271	61	1	0	2108
57	0	0	2	25	128	338	553	501	225	43	0	0	1815
60	0	0	1	13	84	259	461	410	165	23	0	0	1416
65	0	0	0	3	34	147	313	267	87	6	0	0	857
70	0	0	0	1	10	69	180	144	39	1	0	0	444

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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