Historical Climate Data

Temperature Summary
Station: 479046 WEST ALLIS, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	27.1	31.8	41.9	54.0	67.2	77.2	81.9	80.0	73.0	60.9	45.9	32.9	56.2
Min °F	12.7	17.5	27.1	38.2	49.9	59.3	65.6	64.0	54.9	43.7	31.0	19.3	40.3
Mean °F	19.9	24.7	34.5	46.1	58.6	68.3	73.8	72.0	64.0	52.3	38.5	26.1	48.2
HDD base 65	1399	1130	945	568	248	44	5	15	92	399	795	1207	6847
CDD base 65	0	0	0	1	48	142	275	233	60	5	0	0	764

Temperature Extremes
Period of Record: 1951-2001

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	27.8	1964	8.1	1977	57	01-25-1973	-26	01-20-1985
FEB	34.0	1984	16.4	1979	67	02-12-1999	-14	02-21-1963
MAR	42.8	2000	24.0	1960	82	03-31-1986	-12	03-01-1962
APR	52.7	1985	40.6	1975	92	04-22-1980	13	04-03-1954
MAY	65.8	1977	52.5	1967	95	05-19-1975	26	05-09-1966
JUN	71.9	1987	62.0	1969	102	06-20-1953	39	06-03-1971
JUL	78.9	1955	68.4	1962	102	07-13-1965	38	07-10-1968
AUG	77.7	1955	67.6	1967	101	08-19-1983	44	08-28-1965
SEP	68.2	1971	59.6	1962	99	09-03-1964	32	09-25-2001
OCT	61.8	1963	46.7	1952	91	10-02-1964	20	10-26-1962
NOV	47.7	2001	30.2	1959	75	11-02-1961	-6	11-29-1976
DEC	34.0	1982	15.4	1985	70	12-06-2001	-21	12-24-1983

Annual	53.5	1987	45.9	1959	102	06-20-1953	-26	01-20-1985
Winter	30.9	1983	16.0	1963	70	12-06-1901	-26	01-20-1985
Spring	52.9	1977	43.1	1960	95	05-19-1975	-12	03-01-1962
Summer	75.0	1983	68.7	1962	102	06-20-1953	38	07-10-1968
Fall	56.1	1963	47.0	1976	99	09-03-1964	-6	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	20.1	29.6	6.6
FEB	0.0	13.2	24.3	2.4
MAR	0.0	4.9	21.1	0.0
APR	0.1	0.3	6.5	0.0
MAY	0.5	0.0	0.1	0.0
JUN	3.2	0.0	0.0	0.0
JUL	6.2	0.0	0.0	0.0
AUG	2.9	0.0	0.0	0.0
SEP	1.2	0.0	0.0	0.0
OCT	0.0	0.0	2.2	0.0
NOV	0.0	2.3	15.9	0.1
DEC	0.0	14.1	27.6	3.6

Annual	14.3	53.6	125.0	12.3
Winter	0.0	47.3	81.5	12.5
Spring	0.5	5.2	27.6	0.0
Summer	12.4	0.0	0.0	0.0
Fall	1.2	2.2	17.6	0.1