Historical Climate Data

Temperature Summary
Station: 471139 BRULE ISLAND, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	20.0	25.8	36.3	50.9	65.9	74.1	78.5	75.8	65.3	52.9	36.5	24.5	50.5
Min °F	-2.9	1.1	13.7	27.6	39.7	48.5	53.2	51.7	43.3	33.4	21.9	7.5	28.2
Mean °F	8.6	13.5	25.0	39.3	52.8	61.3	65.9	63.8	54.3	43.2	29.2	16.0	39.4
HDD base 65	1752	1444	1240	772	396	148	68	104	325	676	1074	1519	9518
CDD base 65	0	0	0	0	19	37	93	65	4	0	0	0	218

Temperature Extremes
Period of Record: 1936-1989

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	25.0	1944	1.2	1977	56	01-26-1944	-41	01-09-1977
FEB	23.6	1984	4.6	1979	58	02-19-1943	-48	02-17-1979
MAR	39.0	1946	13.7	1960	81	03-28-1946	-37	03-01-1962
APR	48.0	1942	29.8	1950	90	04-27-1952	-7	04-05-1972
MAY	60.6	1977	45.5	1967	95	05-30-1939	16	05-05-1958
JUN	65.7	1987	54.0	1969	101	06-30-1963	24	06-08-1949
JUL	71.5	1983	61.0	1956	102	07-19-1977	32	07-04-1972
AUG	70.1	1937	57.0	1950	100	08-05-1947	28	08-22-1950
SEP	59.3	1941	49.4	1974	98	09-14-1939	18	09-25-1947
OCT	53.1	1947	37.9	1952	87	10-15-1947	6	10-27-1936
NOV	36.2	1944	20.9	1959	75	11-03-1978	-15	11-28-1976
DEC	26.6	1939	5.2	1976	58	12-03-1982	-39	12-30-1976

Annual	43.7	1941	36.7	1972	102	07-19-1977	-48	02-17-1979
Winter	22.3	1944	6.0	1959	58	12-03-1982	-48	02-17-1979
Spring	45.6	1946	33.3	1950	95	05-30-1939	-37	03-01-1962
Summer	67.4	1983	59.6	1950	102	07-19-1977	24	06-08-1949
Fall	47.2	1938	38.0	1976	98	09-14-1939	-15	11-28-1976

Temperature Threshold Climatology
Derived from 1971-1989 Averages

*Annual/seasonal totals may differ from the sum of the monthly totals due to rounding.

Month	# Days Max ≥ 90°F	# Days Max ≤ 32°F	# Days Min ≤ 32°F	# Days Min ≤ 0°F
JAN	0.0	26.8	30.9	18.7
FEB	0.0	20.4	28.0	14.8
MAR	0.0	11.4	29.7	6.3
APR	0.0	1.4	22.8	0.4
MAY	0.3	0.0	9.2	0.0
JUN	1.1	0.0	0.6	0.0
JUL	2.7	0.0	0.1	0.0
AUG	1.0	0.0	0.1	0.0
SEP	0.1	0.0	3.5	0.0
OCT	0.0	0.1	16.5	0.0
NOV	0.0	8.8	26.6	1.0
DEC	0.0	24.1	30.7	11.1

Annual	5.2	94.2	198.3	52.8
Winter	0.0	71.2	89.6	44.6
Spring	0.3	13.0	61.6	6.9
Summer	4.7	0.0	0.7	0.0
Fall	0.1	9.0	46.6	1.0