Historical Climate Data

Temperature Summary
Station: 472428 EAU CLAIRE FAA AIRPORT, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	21.3	28.4	40.4	56.6	70.2	78.5	82.6	79.9	70.4	57.9	40.0	25.9	54.3
Min °F	2.5	8.7	20.9	33.4	45.7	55.0	60.2	58.1	48.4	36.6	23.5	9.3	33.5
Mean °F	11.9	18.6	30.7	45.0	58.0	66.8	71.4	69.0	59.4	47.3	31.8	17.6	44.0
HDD base 65	1647	1301	1064	601	263	58	16	31	197	551	997	1470	8196
CDD base 65	0	0	0	1	44	111	214	155	28	1	0	0	554

Temperature Extremes
Period of Record: 1949-2001

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	23.6	1990	-0.7	1977	54	01-25-1981	-45	01-30-1951
FEB	31.6	1998	7.9	1967	63	02-29-2000	-35	02-02-1996
MAR	39.7	1973	20.1	1960	84	03-29-1986	-35	03-01-1962
APR	51.9	1977	35.2	1950	90	04-29-1970	5	04-03-1954
MAY	66.2	1977	50.3	1954	93	05-22-1972	20	05-09-1966
JUN	71.6	1991	58.8	1969	100	06-08-1985	33	06-01-1964
JUL	76.2	1988	65.5	1992	104	07-15-1988	42	07-04-1972
AUG	73.8	1995	64.2	1950	104	08-01-1988	37	08-20-1950
SEP	65.7	1998	53.3	1993	97	09-07-1978	23	09-29-1967
OCT	57.9	1963	41.1	1952	89	10-02-1953	11	10-20-1952
NOV	44.0	2001	23.0	1951	76	11-08-1999	-18	11-30-1964
DEC	27.9	1959	4.6	1983	64	12-05-2001	-32	12-19-1983

Annual	48.9	1998	40.2	1950	104	07-15-1988	-45	01-30-1951
Winter	26.0	1998	7.6	1979	64	12-05-1901	-45	01-30-1951
Spring	51.6	1977	37.3	1950	93	05-22-1972	-35	03-01-1962
Summer	73.2	1988	64.9	1992	104	07-15-1988	33	06-01-1964
Fall	52.1	1963	41.7	1951	97	09-07-1978	-18	11-30-1964

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	24.4	31.0	14.1
FEB	0.0	16.4	27.2	8.8
MAR	0.0	7.5	26.5	2.5
APR	0.1	0.7	14.2	0.0
MAY	0.8	0.0	2.3	0.0
JUN	2.6	0.0	0.0	0.0
JUL	5.0	0.0	0.0	0.0
AUG	2.5	0.0	0.0	0.0
SEP	0.7	0.0	1.2	0.0
OCT	0.0	0.1	10.6	0.0
NOV	0.0	7.6	24.5	1.0
DEC	0.0	21.1	30.5	8.8

Annual	11.6	77.7	167.6	35.0
Winter	0.0	61.9	88.6	31.7
Spring	0.8	8.2	42.9	2.5
Summer	10.1	0.0	0.0	0.0
Fall	0.7	7.7	36.3	1.0