GARDINER, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(243378) GARDINER
From Year=1956 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	2	7	45	153	391	626	891	848	536	255	36	4	3795
40 S	2	9	55	208	599	1225	2116	2964	3500	3755	3791	3795	3795
45 M	0	1	13	74	252	477	736	693	395	146	10	0	2797
45 S	0	1	14	88	340	817	1553	2246	2641	2786	2796	2797	2797
50 M	0	0	1	28	138	333	581	538	263	68	1	0	1952
50 S	0	0	2	29	168	500	1081	1620	1882	1950	1952	1952	1952
55 M	0	0	0	7	59	204	427	387	150	22	0	0	1256
55 S	0	0	0	7	67	270	697	1084	1234	1256	1256	1256	1256
60 M	0	0	0	1	17	104	278	242	66	4	0	0	712
60 S	0	0	0	1	18	122	400	642	708	712	712	712	712

Corn Growing Degree Days
50 M	1	5	36	117	260	397	564	539	363	188	23	1	2493
50 S	1	5	42	159	419	816	1380	1919	2281	2469	2492	2493	2493

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