HAMILTON, MONTANA

Period of Record General Climate Summary - Growing Degree Days

Station:(243885) HAMILTON
From Year=1895 To Year=2004
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	10	16	67	204	428	612	854	806	509	233	42	10	3794
40 S	10	26	94	298	727	1339	2193	2999	3509	3741	3783	3794	3794
45 M	2	3	22	104	283	462	699	652	365	126	13	2	2733
45 S	2	5	27	131	414	876	1576	2227	2592	2718	2731	2733	2733
50 M	0	0	5	43	162	316	544	497	233	56	3	0	1860
50 S	0	1	6	48	210	527	1071	1568	1801	1857	1859	1860	1860
55 M	0	0	1	13	76	186	391	345	125	20	0	0	1157
55 S	0	0	1	14	90	276	666	1011	1136	1157	1157	1157	1157
60 M	0	0	0	2	26	89	245	205	53	7	0	0	628
60 S	0	0	0	2	29	118	362	567	621	628	628	628	628

Corn Growing Degree Days
50 M	5	12	55	151	279	380	540	514	341	172	29	5	2483
50 S	5	16	72	223	502	881	1421	1935	2277	2449	2478	2483	2483

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