MCCALL, IDAHO

Period of Record General Climate Summary - Growing Degree Days

Station:(105708) MCCALL
From Year=1930 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	0	0	6	61	251	441	696	650	379	141	9	0	2635
40 S	0	1	6	67	318	759	1455	2105	2485	2625	2635	2635	2635
45 M	0	0	0	20	137	298	541	495	244	58	1	0	1795
45 S	0	0	0	20	157	455	996	1492	1736	1794	1795	1795	1795
50 M	0	0	0	5	60	172	388	344	131	15	0	0	1116
50 S	0	0	0	5	65	237	624	969	1100	1116	1116	1116	1116
55 M	0	0	0	1	20	79	242	203	53	2	0	0	600
55 S	0	0	0	1	21	100	341	545	598	600	600	600	600
60 M	0	0	0	0	4	26	116	88	13	0	0	0	248
60 S	0	0	0	0	4	30	146	234	247	248	248	248	248

Corn Growing Degree Days
50 M	0	1	12	65	186	294	473	461	302	143	11	0	1949
50 S	0	1	13	78	264	559	1032	1493	1795	1938	1949	1949	1949

M = Monthly Data
S - Running sum of monthly data.
Growing 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.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Jul 28, 2006
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