ONTONAGON, MICHIGAN

Period of Record General Climate Summary - Growing Degree Days

Station:(206210) ONTONAGON
From Year=1948 To Year=1977
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	1	12	113	359	610	801	768	506	287	40	2	3499
40 S	0	1	13	126	485	1095	1896	2664	3170	3457	3497	3499	3499
45 M	0	0	5	62	236	461	646	613	361	175	15	1	2575
45 S	0	0	5	66	302	763	1410	2023	2384	2559	2574	2575	2575
50 M	0	0	1	31	139	321	492	459	233	95	5	0	1775
50 S	0	0	1	32	171	492	983	1442	1675	1771	1775	1775	1775
55 M	0	0	0	12	74	200	340	311	132	45	1	0	1115
55 S	0	0	0	12	85	285	625	937	1069	1114	1115	1115	1115
60 M	0	0	0	3	33	106	204	183	66	18	0	0	614
60 S	0	0	0	3	36	143	346	529	596	614	614	614	614

Corn Growing Degree Days
50 M	0	1	8	78	225	371	505	478	290	161	20	1	2138
50 S	0	1	9	87	312	684	1189	1667	1957	2118	2138	2138	2138

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