HIBBING CHISHOLM HIBBING AP, MINNESOTA

Period of Record General Climate Summary - Growing Degree Days

Station:(213730) HIBBING FAA AIRPORT
From Year=1962 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	10	90	360	610	790	705	403	139	10	0	3117
40 S	0	0	10	101	461	1071	1860	2565	2968	3107	3117	3117	3117
45 M	0	0	3	39	229	460	635	550	267	68	3	0	2254
45 S	0	0	3	42	271	731	1366	1916	2183	2252	2254	2254	2254
50 M	0	0	1	14	125	315	480	396	156	28	0	0	1514
50 S	0	0	1	15	140	455	935	1331	1486	1514	1514	1514	1514
55 M	0	0	0	4	59	184	327	249	78	9	0	0	910
55 S	0	0	0	4	63	247	574	823	901	910	910	910	910
60 M	0	0	0	1	24	88	187	129	32	2	0	0	463
60 S	0	0	0	1	24	113	300	429	461	463	463	463	463

Corn Growing Degree Days
50 M	0	0	9	79	236	373	497	438	246	91	8	0	1978
50 S	0	0	10	89	325	698	1195	1633	1878	1969	1978	1978	1978

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