TWO HARBORS, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(218419) TWO HARBORS
From Year=1894 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	8	73	269	495	749	758	503	217	26	1	3099
40 S	0	1	8	81	350	845	1594	2352	2856	3072	3098	3099	3099
45 M	0	0	2	27	144	346	594	603	357	110	6	0	2190
45 S	0	0	2	28	173	519	1113	1716	2073	2184	2190	2190	2190
50 M	0	0	0	8	63	207	439	448	222	43	1	0	1431
50 S	0	0	0	8	71	277	717	1165	1387	1430	1431	1431	1431
55 M	0	0	0	2	21	100	289	296	113	12	0	0	833
55 S	0	0	0	2	23	123	412	708	821	833	833	833	833
60 M	0	0	0	0	5	37	157	160	44	2	0	0	406
60 S	0	0	0	0	5	42	199	360	404	406	406	406	406

Corn Growing Degree Days
50 M	0	0	5	46	149	277	452	458	270	100	10	0	1768
50 S	0	1	6	52	201	478	929	1387	1657	1757	1767	1768	1768

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