Historical Climate Data

Temperature Summary
Station: 474457 LAKE GENEVA, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	27.9	33.5	44.7	58.6	71.8	81.6	85.6	83.1	75.3	62.5	46.1	32.9	58.6
Min °F	12.2	16.9	26.2	36.7	47.6	57.4	63.1	61.7	53.7	42.6	30.8	18.8	39.0
Mean °F	20.1	25.2	35.5	47.7	59.7	69.5	74.4	72.4	64.5	52.6	38.5	25.9	48.8
HDD base 65	1393	1114	917	524	220	30	4	15	88	393	796	1215	6709
CDD base 65	0	0	0	2	56	165	295	244	73	7	0	0	842

Temperature Extremes
Period of Record: 1948-2001

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	30.8	1990	7.4	1977	58	01-31-1989	-27	01-20-1985
FEB	36.9	1998	15.0	1979	67	02-25-2000	-25	02-03-1996
MAR	43.7	2000	23.0	1960	81	03-31-1981	-15	03-01-1962
APR	54.6	1955	40.4	1950	90	04-22-1980	9	04-07-1982
MAY	66.8	1977	53.4	1997	94	05-22-1956	27	05-01-1961
JUN	74.0	1988	62.5	1969	104	06-20-1988	35	06-11-1972
JUL	79.6	1999	68.9	1992	104	07-13-1995	39	07-01-1965
AUG	77.7	1988	66.7	1967	106	08-01-1988	40	08-29-1965
SEP	69.4	1998	58.0	1993	100	09-01-1953	28	09-30-1993
OCT	59.7	1963	46.2	1988	87	10-01-1971	17	10-30-1988
NOV	48.3	2001	29.8	1959	75	11-01-1950	-6	11-24-1950
DEC	33.7	2001	14.4	1983	67	12-05-2001	-23	12-24-1983

Annual	53.1	1998	44.5	1966	106	08-01-1988	-27	01-20-1985
Winter	31.7	1998	15.8	1977	67	12-05-1901	-27	01-20-1985
Spring	53.9	1977	42.6	1950	94	05-22-1956	-15	03-01-1962
Summer	76.6	1988	67.4	1992	106	08-01-1988	35	06-11-1972
Fall	55.9	1998	46.7	1976	100	09-01-1953	-6	11-24-1950

Temperature Threshold Climatology
Derived from 1971-2000 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	19.6	29.7	6.6
FEB	0.0	12.2	25.5	3.8
MAR	0.0	4.0	23.1	0.2
APR	0.0	0.0	9.2	0.0
MAY	0.9	0.0	0.8	0.0
JUN	4.4	0.0	0.0	0.0
JUL	7.4	0.0	0.0	0.0
AUG	4.3	0.0	0.0	0.0
SEP	1.3	0.0	0.2	0.0
OCT	0.0	0.0	4.9	0.0
NOV	0.0	3.0	18.4	0.1
DEC	0.0	13.5	28.3	2.9

Annual	18.0	52.5	141.0	13.7
Winter	0.0	45.2	83.6	13.3
Spring	0.9	4.0	33.1	0.2
Summer	16.1	0.0	0.0	0.0
Fall	1.3	3.0	23.5	0.1