Historical Climate Data

Temperature Summary
Station: 475581 MONTELLO, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	25.3	31.0	42.4	56.6	69.5	78.9	82.8	79.9	71.6	59.9	43.5	30.3	56.0
Min °F	4.4	9.6	21.8	33.6	45.4	54.5	59.3	56.8	47.9	36.2	24.2	11.4	33.8
Mean °F	14.9	20.3	32.1	45.1	57.5	66.7	71.1	68.4	59.8	48.1	33.9	20.9	44.9
HDD base 65	1555	1251	1020	597	271	53	11	43	182	527	934	1370	7814
CDD base 65	0	0	0	1	37	104	199	147	25	1	0	0	514

Temperature Extremes
Period of Record: 1954-2001

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	27.5	1990	3.2	1977	52	01-22-1964	-35	01-15-1963
FEB	32.5	1998	11.2	1963	65	02-23-1984	-33	02-03-1996
MAR	40.3	1973	19.4	1960	84	03-30-1986	-30	03-01-1962
APR	53.3	1977	40.3	1995	92	04-22-1980	10	04-07-1972
MAY	65.1	1977	50.6	1967	93	05-26-1967	22	05-09-1966
JUN	71.3	1971	57.7	1969	102	06-21-1988	31	06-10-1972
JUL	75.7	1955	66.4	1992	104	07-14-1995	40	07-06-1965
AUG	73.9	1995	63.4	1967	103	08-02-1988	35	08-25-1958
SEP	65.8	1978	54.4	1993	97	09-09-1955	25	09-28-1964
OCT	58.4	1963	43.0	1987	87	10-06-1963	11	10-22-1982
NOV	45.3	2001	26.8	1995	76	11-09-1999	-12	11-29-1976
DEC	29.5	2001	6.8	1983	65	12-04-1998	-34	12-19-1983

Annual	49.5	1998	42.7	1996	104	07-14-1995	-35	01-15-1963
Winter	27.6	1998	11.1	1963	65	12-04-1998	-35	01-15-1963
Spring	52.5	1977	39.8	1996	93	05-26-1967	-30	03-01-1962
Summer	72.6	1988	64.9	1992	104	07-14-1995	31	06-10-1972
Fall	52.3	1971	43.6	1976	97	09-09-1955	-12	11-29-1976

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	22.0	30.8	11.6
FEB	0.0	14.9	27.5	7.2
MAR	0.0	5.7	25.2	1.5
APR	0.0	0.2	13.7	0.0
MAY	0.3	0.0	2.1	0.0
JUN	2.8	0.0	0.1	0.0
JUL	4.8	0.0	0.0	0.0
AUG	2.1	0.0	0.0	0.0
SEP	0.6	0.0	1.3	0.0
OCT	0.0	0.0	10.5	0.0
NOV	0.0	4.7	23.1	0.6
DEC	0.0	17.1	29.5	6.9

Annual	10.9	63.6	162.3	27.5
Winter	0.0	54.0	87.8	25.7
Spring	0.4	5.9	41.1	1.5
Summer	9.7	0.0	0.1	0.0
Fall	0.6	4.6	34.7	0.6