RAINBOW RSVR TOMAHAWK, WISCONSIN

Period of Record General Climate Summary - Growing Degree Days

Station:(476939) RAINBOW RESERVOIR
From Year=1946 To Year=1996
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	106	395	639	796	745	453	206	22	1	3372
40 S	0	0	10	116	511	1150	1945	2690	3143	3349	3371	3372	3372
45 M	0	0	3	55	262	490	641	590	312	115	7	0	2476
45 S	0	0	3	58	321	810	1451	2041	2353	2468	2476	2476	2476
50 M	0	0	0	25	158	345	486	436	192	55	2	0	1698
50 S	0	0	0	25	183	527	1013	1449	1641	1696	1698	1698	1698
55 M	0	0	0	10	82	214	333	287	101	22	0	0	1049
55 S	0	0	0	10	92	306	638	925	1026	1048	1049	1049	1049
60 M	0	0	0	3	35	110	193	158	45	7	0	0	551
60 S	0	0	0	3	38	148	342	500	545	551	551	551	551

Corn Growing Degree Days
50 M	0	1	9	88	264	396	502	463	267	128	15	0	2134
50 S	0	1	10	98	362	758	1261	1724	1991	2119	2134	2134	2134

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