MAHNOMEN 1 W, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(215012) MAHNOMEN 1 W
From Year=1927 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	18	149	483	721	888	843	511	216	18	0	3847
40 S	0	0	18	167	650	1371	2259	3102	3613	3829	3846	3847	3847
45 M	0	0	6	78	342	571	733	688	369	123	6	0	2916
45 S	0	0	6	84	426	997	1731	2419	2787	2911	2916	2916	2916
50 M	0	0	2	36	221	423	578	533	241	63	1	0	2098
50 S	0	0	2	39	260	682	1261	1794	2035	2097	2098	2098	2098
55 M	0	0	1	15	126	281	424	381	139	27	0	0	1394
55 S	0	0	1	16	141	423	847	1228	1367	1394	1394	1394	1394
60 M	0	0	0	4	59	159	275	240	72	10	0	0	819
60 S	0	0	0	5	64	223	498	738	810	819	819	819	819

Corn Growing Degree Days
50 M	0	0	13	105	305	451	579	543	314	134	11	0	2454
50 S	0	0	13	118	423	874	1452	1995	2310	2443	2454	2454	2454

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