Historical Climate Data

Temperature Summary
Station: 474546 LANCASTER 4 WSW, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	22.5	29.1	41.0	55.5	67.3	76.6	80.3	77.9	69.6	58.1	41.0	27.7	53.9
Min °F	6.3	12.9	24.6	36.2	48.0	57.2	61.8	59.9	51.4	39.7	26.5	13.4	36.5
Mean °F	14.4	21.0	32.8	45.9	57.7	66.9	71.1	68.9	60.5	48.9	33.8	20.6	45.2
HDD base 65	1568	1233	997	576	263	51	13	42	171	501	937	1378	7730
CDD base 65	0	0	0	1	35	108	200	163	35	1	0	0	543

Temperature Extremes
Period of Record: 1896-2001

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	29.0	1944	0.7	1912	60	01-01-1897	-31	01-23-1963
FEB	34.2	1954	5.0	1936	64	02-26-2000	-31	02-02-1996
MAR	46.5	1910	22.1	1899	82	03-27-1907	-22	03-01-1962
APR	54.8	1955	40.9	1907	95	04-22-1980	6	04-06-1982
MAY	68.6	1934	49.7	1924	104	05-31-1934	23	05-02-1908
JUN	75.3	1934	61.1	1969	100	06-29-1931	35	06-01-1897
JUL	81.3	1916	65.8	1992	108	07-14-1936	42	07-08-1901
AUG	78.9	1947	64.2	1992	103	08-03-1930	34	08-30-1915
SEP	70.1	1931	55.0	1993	100	09-07-1939	20	09-30-1899
OCT	61.8	1963	39.2	1925	92	10-06-1963	3	10-29-1925
NOV	46.8	1931	26.7	1995	77	11-07-1915	-15	11-26-1977
DEC	33.2	1931	8.8	2000	62	12-03-1951	-27	12-19-1983

Annual	52.3	1931	39.9	1908	108	07-14-1936	-31	01-23-1963
Winter	28.2	1932	11.3	1936	64	02-26-1900	-31	01-23-1963
Spring	53.8	1977	40.9	1996	104	05-31-1934	-22	03-01-1962
Summer	74.5	1936	64.9	1915	108	07-14-1936	34	08-30-1915
Fall	57.5	1931	43.1	1896	100	09-07-1939	-15	11-26-1977

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	22.8	30.7	10.4
FEB	0.0	15.0	26.9	5.9
MAR	0.0	5.7	24.2	1.0
APR	0.1	0.4	10.4	0.0
MAY	0.1	0.0	1.0	0.0
JUN	1.3	0.0	0.0	0.0
JUL	3.7	0.0	0.0	0.0
AUG	2.0	0.0	0.0	0.0
SEP	0.5	0.0	0.6	0.0
OCT	0.0	0.0	8.0	0.0
NOV	0.0	5.7	22.5	0.4
DEC	0.0	17.8	30.0	5.7

Annual	7.4	68.3	155.9	23.6
Winter	0.0	55.6	87.5	22.0
Spring	0.1	6.2	36.0	1.0
Summer	6.9	0.0	0.0	0.0
Fall	0.5	5.8	31.1	0.4