MARQUETTE WSO AP, MICHIGAN

Period of Record General Climate Summary - Growing Degree Days

Station:(205184) MARQUETTE WSO
From Year=1959 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	1	14	88	344	599	779	716	443	173	21	1	3178
40 S	0	1	14	102	446	1045	1825	2541	2984	3156	3177	3178	3178
45 M	0	0	5	45	225	451	624	561	304	96	7	0	2318
45 S	0	0	5	50	275	726	1350	1911	2215	2311	2318	2318	2318
50 M	0	0	2	22	135	311	470	407	188	46	2	0	1581
50 S	0	0	2	23	158	469	939	1346	1534	1580	1581	1581	1581
55 M	0	0	1	10	74	192	320	262	101	19	0	0	979
55 S	0	0	1	11	85	277	597	859	960	978	979	979	979
60 M	0	0	0	4	36	101	188	144	46	7	0	0	526
60 S	0	0	0	4	40	141	329	473	519	526	526	526	526

Corn Growing Degree Days
50 M	0	1	10	63	213	360	485	435	247	93	10	0	1916
50 S	0	1	10	73	286	646	1132	1566	1813	1906	1916	1916	1916

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