Historical Climate Data

Temperature Summary
Station: 475164 MATHER 3 NW, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	22.9	29.5	40.6	55.4	68.9	77.3	81.3	78.9	70.2	58.2	41.5	27.8	54.4
Min °F	2.8	8.4	20.2	32.5	43.4	52.5	57.1	54.9	45.8	35.1	23.4	9.6	32.1
Mean °F	12.9	19.0	30.4	44.0	56.2	64.9	69.2	66.9	58.0	46.7	32.5	18.7	43.3
HDD base 65	1616	1290	1073	633	306	85	25	54	224	569	977	1435	8287
CDD base 65	0	0	0	0	31	81	155	112	14	0	0	0	393

Temperature Extremes
Period of Record: 1903-2001

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	25.7	1990	-5.3	1912	58	01-26-1981	-43	01-30-1951
FEB	31.2	1998	0.9	1936	60	02-16-1921	-44	02-20-1929
MAR	41.4	1910	19.7	1923	84	03-30-1986	-37	03-01-1962
APR	51.3	1977	37.1	1936	92	04-30-1952	3	04-01-1924
MAY	66.0	1977	47.2	1907	98	05-28-1936	16	05-02-1911
JUN	72.2	1933	58.0	1982	105	06-01-1934	30	06-10-1913
JUL	75.0	1921	63.7	1992	106	07-14-1936	35	07-07-1934
AUG	74.1	1947	60.0	1915	107	08-24-1948	28	08-08-1904
SEP	64.9	1931	51.9	1918	101	09-07-1922	18	09-29-1949
OCT	59.1	1963	36.2	1917	91	10-07-1963	3	10-30-1925
NOV	43.8	2001	24.2	1911	78	11-01-1950	-12	11-28-1930
DEC	29.2	1923	7.1	1985	62	12-03-1982	-29	12-19-1983

Annual	48.0	1973	37.5	1917	107	08-24-1948	-44	02-20-1929
Winter	25.8	1998	6.2	1917	62	12-03-1982	-44	02-20-1929
Spring	51.9	1977	37.3	1917	98	05-28-1936	-37	03-01-1962
Summer	70.7	1921	60.8	1915	107	08-24-1948	28	08-08-1904
Fall	52.4	1931	42.0	1911	101	09-07-1922	-12	11-28-1930

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	24.2	30.9	14.1
FEB	0.0	16.2	27.5	9.3
MAR	0.0	7.6	27.2	2.9
APR	0.0	0.7	16.6	0.0
MAY	0.2	0.0	3.3	0.0
JUN	2.0	0.0	0.1	0.0
JUL	3.5	0.0	0.0	0.0
AUG	1.9	0.0	0.0	0.0
SEP	0.4	0.0	1.9	0.0
OCT	0.0	0.0	12.9	0.0
NOV	0.0	6.7	24.6	0.9
DEC	0.0	19.9	30.4	8.6

Annual	8.3	74.6	173.7	35.4
Winter	0.0	60.5	88.9	32.2
Spring	0.3	8.4	47.3	2.9
Summer	7.4	0.0	0.1	0.0
Fall	0.4	6.6	39.4	0.9