Historical Climate Data

Temperature Summary
Station: 470773 BIG FALLS HYDRO, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	21.6	28.6	39.5	54.6	68.8	76.5	80.6	77.9	68.7	56.6	38.6	25.6	53.1
Min °F	-6.0	-0.4	13.0	27.6	39.2	47.6	52.7	50.6	41.5	30.9	18.7	2.3	26.5
Mean °F	7.8	14.1	26.3	41.1	54.0	62.1	66.7	64.3	55.1	43.8	28.7	14.0	39.8
HDD base 65	1774	1426	1202	717	362	132	58	98	304	659	1090	1583	9405
CDD base 65	0	0	0	1	21	43	109	74	6	0	0	0	254

Temperature Extremes
Period of Record: 1983-2001

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	18.5	1990	-1.9	1994	47	01-09-1990	-49	01-31-1996
FEB	28.9	1998	3.3	1989	55	02-28-2000	-51	02-02-1996
MAR	33.6	1987	20.8	1984	78	03-31-1986	-28	03-02-1995
APR	47.0	1998	34.2	1995	86	04-21-1987	-1	04-04-1995
MAY	60.2	1988	50.3	1984	90	05-29-1986	14	05-04-1987
JUN	66.7	1988	57.7	1993	94	06-19-1995	28	06-02-1985
JUL	71.0	1988	59.8	1992	98	07-27-1988	37	07-07-1997
AUG	69.2	1983	60.3	1992	98	08-01-1988	32	08-24-1987
SEP	60.4	1998	48.1	1993	90	09-14-1998	23	09-30-1993
OCT	48.4	1984	37.1	1988	85	10-03-1992	7	10-30-1988
NOV	33.8	1990	22.1	1985	70	11-02-1990	-22	11-29-1985
DEC	20.7	1994	1.6	1985	60	12-03-1998	-41	12-24-1983

Annual	45.5	1998	36.6	1996	98	07-27-1988	-51	02-02-1996
Winter	24.3	1998	6.9	1996	60	12-03-1998	-51	02-02-1996
Spring	45.5	1987	36.0	1995	90	05-29-1986	-28	03-02-1995
Summer	68.7	1988	59.7	1992	98	07-27-1988	28	06-02-1985
Fall	47.9	1998	37.4	1993	90	09-14-1998	-22	11-29-1985

Temperature Threshold Climatology
Derived from 1983-2000 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	24.4	31.0	18.4
FEB	0.0	15.9	27.9	13.5
MAR	0.0	7.3	29.4	5.6
APR	0.0	0.6	21.9	0.1
MAY	0.1	0.0	7.5	0.0
JUN	1.4	0.0	0.9	0.0
JUL	2.3	0.0	0.0	0.0
AUG	1.4	0.0	0.1	0.0
SEP	0.1	0.0	5.2	0.0
OCT	0.0	0.1	20.6	0.0
NOV	0.0	8.8	28.1	2.6
DEC	0.0	21.4	31.0	13.4

Annual	5.2	78.8	204.8	53.8
Winter	0.0	61.5	89.9	45.3
Spring	0.1	8.0	58.9	5.7
Summer	5.0	0.0	1.0	0.0
Fall	0.1	8.7	53.6	2.5