Historical Climate Data

Temperature Summary
Station: 471568 CHILTON SEWAGE PLANT, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	24.1	28.9	40.5	55.1	68.9	78.2	82.4	79.6	71.3	59.1	42.8	29.3	55.0
Min °F	6.9	11.2	21.9	33.6	44.8	54.6	59.6	57.8	48.9	38.3	26.5	14.0	34.8
Mean °F	15.5	20.1	31.2	44.4	56.9	66.4	71.0	68.7	60.1	48.7	34.7	21.7	45.0
HDD base 65	1535	1258	1048	621	297	66	18	36	173	507	912	1344	7815
CDD base 65	0	0	0	1	44	108	203	151	26	1	0	0	534

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	27.6	1990	4.4	1977	57	01-25-1947	-33	01-30-1951
FEB	31.3	1998	6.7	1904	63	02-27-2000	-34	02-10-1899
MAR	42.7	1910	20.6	1960	82	03-29-1910	-28	03-01-1962
APR	51.9	1955	35.3	1907	89	04-22-1980	8	04-03-1954
MAY	65.0	1977	48.6	1997	92	05-24-1991	21	05-10-1966
JUN	71.4	1988	59.7	1969	99	06-20-1988	31	06-04-1945
JUL	75.7	1955	64.7	1992	103	07-14-1995	35	07-06-1967
AUG	76.3	1947	63.7	1950	100	08-06-1947	38	08-29-1965
SEP	68.0	1897	55.6	1993	97	09-08-1897	24	09-29-1949
OCT	59.8	1947	44.9	1988	88	10-06-1963	11	10-27-1898
NOV	44.1	2001	26.8	1995	78	11-01-1944	-9	11-25-1950
DEC	30.9	1982	11.1	1989	65	12-06-2001	-21	12-12-1903

Annual	50.2	1901	40.2	1982	103	07-14-1995	-34	02-10-1999
Winter	27.4	1983	9.0	1904	65	12-06-1901	-34	02-10-1999
Spring	51.5	1977	38.8	1996	92	05-24-1991	-28	03-01-1962
Summer	73.6	1988	64.0	1992	103	07-14-1995	31	06-04-1945
Fall	53.9	1963	44.6	1896	97	09-08-1997	-9	11-25-1950

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	22.7	30.6	9.4
FEB	0.0	16.5	27.2	5.5
MAR	0.0	6.9	25.8	1.2
APR	0.0	0.5	13.5	0.0
MAY	0.2	0.0	2.4	0.0
JUN	2.3	0.0	0.0	0.0
JUL	3.9	0.0	0.0	0.0
AUG	2.0	0.0	0.0	0.0
SEP	0.2	0.0	0.6	0.0
OCT	0.0	0.0	6.9	0.0
NOV	0.0	4.5	21.5	0.1
DEC	0.0	17.7	29.6	4.7

Annual	8.4	69.6	158.3	21.0
Winter	0.0	56.9	87.3	19.6
Spring	0.2	7.2	41.8	1.2
Summer	8.1	0.0	0.0	0.0
Fall	0.2	4.5	28.9	0.1