HOUGHTON FAA AIRPORT, MICHIGAN

Period of Record General Climate Summary - Growing Degree Days

Station:(203908) HOUGHTON FAA AIRPORT
From Year=1952 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	9	77	329	588	782	741	459	187	24	0	3196
40 S	0	0	9	86	414	1002	1784	2525	2984	3171	3195	3196	3196
45 M	0	0	3	36	206	439	627	586	317	101	8	0	2322
45 S	0	0	3	39	245	684	1311	1897	2214	2314	2322	2322	2322
50 M	0	0	1	15	116	297	472	432	195	47	2	0	1577
50 S	0	0	1	16	132	429	902	1333	1528	1575	1577	1577	1577
55 M	0	0	1	5	59	177	321	283	104	19	0	0	968
55 S	0	0	1	6	65	241	562	845	949	968	968	968	968
60 M	0	0	0	2	25	88	184	155	47	6	0	0	508
60 S	0	0	0	2	27	115	299	454	502	508	508	508	508

Corn Growing Degree Days
50 M	0	0	4	45	184	337	479	444	237	84	9	0	1823
50 S	0	0	5	49	233	570	1049	1492	1730	1814	1823	1823	1823

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