Historical Climate Data

Temperature Summary
Station: 477226 RIVER FALLS, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	21.6	28.5	40.8	57.1	69.8	78.9	83.1	80.7	71.7	59.6	40.6	26.1	54.9
Min °F	0.8	6.8	18.9	31.5	43.3	53.9	58.2	56.2	46.8	35.7	22.1	8.2	31.9
Mean °F	11.2	17.7	29.9	44.3	56.6	66.4	70.7	68.5	59.3	47.7	31.4	17.2	43.4
HDD base 65	1667	1326	1090	622	295	69	22	36	196	539	1010	1484	8356
CDD base 65	0	0	0	1	32	110	198	143	22	0	0	0	506

Temperature Extremes
Period of Record: 1940-2001

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	26.8	1990	0.2	1977	57	01-25-1944	-42	01-30-1951
FEB	30.9	1987	9.2	1978	57	02-18-1981	-36	02-01-1951
MAR	41.8	1946	19.5	1965	81	03-29-1986	-38	03-11-1948
APR	53.3	1987	36.2	1950	92	04-30-1968	5	04-03-1954
MAY	67.2	1977	50.2	1997	94	05-28-1969	19	05-03-1967
JUN	73.7	1988	60.2	1945	99	06-13-1956	30	06-04-1945
JUL	76.7	1955	65.8	1992	102	07-26-1955	37	07-10-1965
AUG	76.3	1947	63.5	1950	103	08-04-1947	34	08-20-1950
SEP	65.5	1978	54.2	1965	95	09-16-1955	22	09-28-1942
OCT	59.1	1963	42.3	1952	90	10-04-1997	9	10-20-1952
NOV	44.3	2001	23.9	1996	77	11-09-1999	-19	11-28-1952
DEC	29.0	1959	4.6	1983	66	12-02-1998	-36	12-31-1946

Annual	49.6	1987	39.8	1950	103	08-04-1947	-42	01-30-1951
Winter	25.2	1987	8.5	1979	66	12-02-1998	-42	01-30-1951
Spring	52.8	1977	37.4	1950	94	05-28-1969	-38	03-11-1948
Summer	74.9	1988	64.6	1950	103	08-04-1947	30	06-04-1945
Fall	53.8	1963	43.3	1995	95	09-16-1955	-19	11-28-1952

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	23.3	30.9	13.8
FEB	0.0	15.6	26.9	8.4
MAR	0.0	6.5	25.4	2.2
APR	0.1	0.4	13.5	0.0
MAY	0.2	0.0	2.2	0.0
JUN	2.2	0.0	0.0	0.0
JUL	4.2	0.0	0.0	0.0
AUG	2.0	0.0	0.0	0.0
SEP	0.5	0.0	0.9	0.0
OCT	0.0	0.2	9.0	0.0
NOV	0.0	7.5	23.5	1.0
DEC	0.0	20.5	30.3	8.1

Annual	9.2	74.0	162.6	33.4
Winter	0.0	59.4	88.1	30.3
Spring	0.3	7.0	41.2	2.2
Summer	8.4	0.0	0.0	0.0
Fall	0.5	7.7	33.5	1.0