COOKE CITY 2 W, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(241995) COOKE CITY 2 W
From Year=1967 To Year=2012
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	1	14	99	281	506	454	215	40	1	0	1610
40 S	0	0	1	15	114	395	901	1354	1570	1610	1610	1610	1610
45 M	0	0	0	2	33	158	352	302	104	9	0	0	961
45 S	0	0	0	2	35	193	546	848	952	961	961	961	961
50 M	0	0	0	0	6	67	205	160	34	1	0	0	473
50 S	0	0	0	0	6	73	278	438	472	473	473	473	473
55 M	0	0	0	0	0	18	82	53	5	0	0	0	159
55 S	0	0	0	0	0	19	101	154	159	159	159	159	159
60 M	0	0	0	0	0	2	16	7	0	0	0	0	25
60 S	0	0	0	0	0	2	18	25	25	25	25	25	25

Corn Growing Degree Days
50 M	0	0	3	26	103	225	373	345	203	62	1	0	1341
50 S	0	0	3	30	133	357	731	1075	1278	1340	1341	1341	1341

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 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