Chippewa Valley Rgnl AP Weather Records (USW00014991)

Record envelope, standing records and threshold days for Chippewa Valley Rgnl AP (USW00014991), Wisconsin, United States, with 78 years of record.

Key Facts for Chippewa Valley Rgnl AP

Chippewa Valley Rgnl AP (USW00014991) is a weather station in Wisconsin, United States at 44.87 latitude and -91.49 longitude, 269 m (884 ft) above sea level.
The station reports from 1949 to 2026, 78 years of record.
1,464 records set at Chippewa Valley Rgnl AP still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Chippewa Valley Rgnl AP set a daily record high minimum temperature of 17.8 C (64.0 F) on 11 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Wisconsin, United States, 44.87 latitude, -91.49 longitude.
Elevation: 269 m (884 ft).
Period of record: 1949 to 2026, 78 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

8 days at or beyond a record

The band shows the record high and record low for each calendar day at Chippewa Valley Rgnl AP. The lines show the 2026 daily maximum and minimum. 8 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Chippewa Valley Rgnl AP, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	12.2 C (54.0 F)	-42.8 C (-45.0 F)	5.0 C (41.0 F)	-33.9 C (-29.0 F)
Feb	17.2 C (63.0 F)	-37.2 C (-35.0 F)	12.8 C (55.0 F)	-22.8 C (-9.0 F)
Mar	28.9 C (84.0 F)	-37.2 C (-35.0 F)	23.9 C (75.0 F)	-19.4 C (-2.9 F)
Apr	32.8 C (91.0 F)	-15.5 C (4.1 F)	26.7 C (80.1 F)	-10.6 C (12.9 F)
May	35.0 C (95.0 F)	-6.7 C (19.9 F)	32.2 C (90.0 F)	-2.8 C (27.0 F)
Jun	37.8 C (100.0 F)	0.6 C (33.1 F)	34.4 C (93.9 F)	8.3 C (46.9 F)
Jul	40.0 C (104.0 F)	5.6 C (42.1 F)	35.0 C (95.0 F)	8.9 C (48.0 F)
Aug	40.0 C (104.0 F)	2.8 C (37.0 F)	32.2 C (90.0 F)	8.3 C (46.9 F)
Sep	37.8 C (100.0 F)	-5.0 C (23.0 F)	31.7 C (89.1 F)	3.3 C (37.9 F)
Oct	31.7 C (89.1 F)	-11.7 C (10.9 F)	31.1 C (88.0 F)	0.0 C (32.0 F)
Nov	24.4 C (75.9 F)	-27.8 C (-18.0 F)	n/a	n/a
Dec	17.8 C (64.0 F)	-35.6 C (-32.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chippewa Valley Rgnl AP still stand. 1965 holds the most, with 36.

Standing records at Chippewa Valley Rgnl AP by the year they were set
Year set	Standing records
1949	1
1950	30
1951	34
1952	21
1953	23
1954	16
1955	19
1956	26
1957	11
1958	13
1959	23
1960	18
1961	12
1962	30
1963	25
1964	28
1965	36
1966	22
1967	27
1968	21
1969	17
1970	12
1971	17
1972	34
1973	15
1974	25
1975	7
1976	20
1977	22
1978	13
1979	12
1980	11
1981	16
1982	16
1983	25
1984	12
1985	28
1986	21
1987	26
1988	33
1989	23
1990	13
1991	24
1992	12
1993	9
1994	12
1995	21
1996	17
1997	14
1998	25
1999	14
2000	26
2001	20
2002	16
2003	16
2004	8
2005	12
2006	20
2007	22
2008	6
2009	17
2010	10
2011	14
2012	30
2013	11
2014	21
2015	9
2016	7
2017	28
2018	15
2019	12
2020	26
2021	30
2022	10
2023	28
2024	27
2025	15
2026	6

All-Time Record Progression

6 new records

6 all-time records were set at Chippewa Valley Rgnl AP between 23 December 1983 and 22 June 2025. Each dot is a new record.

When Chippewa Valley Rgnl AP set new all-time records
Date	Kind	Detail
1983-12-23	Record low maximum temperature	Record low maximum temperature -28.3 C (-18.9 F)
1988-07-15	Record high maximum temperature	Record high maximum temperature 40.0 C (104.0 F)
1991-06-27	Record high minimum temperature	Record high minimum temperature 27.2 C (81.0 F)
2000-09-10	Record daily precipitation	Record daily precipitation 151.9 mm (6.0 in)
2010-12-11	Record daily snowfall	Record daily snowfall 55.9 cm (22.0 in)
2025-06-22	Record high minimum temperature	Record high minimum temperature 27.8 C (82.0 F)

Wettest Day of Each Month

Sep: 151.9 mm (6.0 in)

The wettest day on record for each calendar month at Chippewa Valley Rgnl AP. The most was 151.9 mm (6.0 in) on 10 September 2000.

Record daily precipitation for each month at Chippewa Valley Rgnl AP
Month	Record daily precipitation (mm)	Date
Jan	34.8 mm (1.4 in)	24 January 1967
Feb	25.4 mm (1.0 in)	25 February 1951
Mar	52.8 mm (2.1 in)	29 March 1998
Apr	78.0 mm (3.1 in)	27 April 1975
May	66.3 mm (2.6 in)	1 May 1973
Jun	120.4 mm (4.7 in)	18 June 2011
Jul	111.5 mm (4.4 in)	8 July 1959
Aug	104.6 mm (4.1 in)	9 August 1993
Sep	151.9 mm (6.0 in)	10 September 2000
Oct	80.5 mm (3.2 in)	8 October 1949
Nov	82.3 mm (3.2 in)	1 November 1991
Dec	47.0 mm (1.9 in)	14 December 2015

Period of Record Coverage

1949 to 2026

78 years of record at Chippewa Valley Rgnl AP, 1949 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1949, 2026.

Days with data per year at Chippewa Valley Rgnl AP
Year	Days with data	Share of year	Complete
1949	92	25%	No
1950	365	100%	Yes
1951	364	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	364	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	366	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	365	100%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	365	100%	Yes
2023	365	100%	Yes
2024	366	100%	Yes
2025	365	100%	Yes
2026	286	78%	No

Latest Records

Latest records at Chippewa Valley Rgnl AP
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 October 2026	Chippewa Valley Rgnl AP, US	daily high min (Provisional)	17.8 C (64.0 F)	2.8 C (5.0 F)	52 years	27 of 100 (Routine)
11 October 2026	Chippewa Valley Rgnl AP, US	daily high max (Provisional)	31.1 C (88.0 F)	3.3 C (5.9 F)	11 years	15 of 100 (Routine)
10 October 2026	Chippewa Valley Rgnl AP, US	daily high max (Provisional)	30.6 C (87.1 F)	3.4 C (6.1 F)	16 years	16 of 100 (Routine)
17 June 2026	Chippewa Valley Rgnl AP, US	daily low max	15.6 C (60.1 F)	2.2 C (4.0 F)	52 years	26 of 100 (Routine)
10 June 2026	Chippewa Valley Rgnl AP, US	daily rain	41.1 mm (1.6 in)	20.8 mm (0.8 in)	57 years	41 of 100 (Notable)
7 May 2026	Chippewa Valley Rgnl AP, US	daily low min (Tie)	-1.7 C (28.9 F)	tie	72 years	7 of 100 (Routine)
21 March 2026	Chippewa Valley Rgnl AP, US	daily high max	23.9 C (75.0 F)	3.9 C (7.0 F)	13 years	16 of 100 (Routine)
17 March 2026	Chippewa Valley Rgnl AP, US	daily low min (Tie)	-19.4 C (-2.9 F)	tie	32 years	4 of 100 (Routine)
15 March 2026	Chippewa Valley Rgnl AP, US	daily snowfall	22.1 cm (8.7 in)	11.4 cm (4.5 in)	52 years	44 of 100 (Notable)
9 March 2026	Chippewa Valley Rgnl AP, US	daily high min	4.4 C (39.9 F)	1.1 C (2.0 F)	9 years	10 of 100 (Routine)
18 February 2026	Chippewa Valley Rgnl AP, US	daily rain	16.0 mm (0.6 in)	4.1 mm (0.16 in)	64 years	20 of 100 (Routine)
14 February 2026	Chippewa Valley Rgnl AP, US	daily high max	10.6 C (51.1 F)	2.8 C (5.0 F)	72 years	32 of 100 (Routine)
25 January 2026	Chippewa Valley Rgnl AP, US	daily low min (Tie)	-31.1 C (-24.0 F)	tie	60 years	6 of 100 (Routine)
24 January 2026	Chippewa Valley Rgnl AP, US	daily low max	-20.0 C (-4.0 F)	0.6 C (1.1 F)	64 years	26 of 100 (Routine)
24 January 2026	Chippewa Valley Rgnl AP, US	daily low min (Tie)	-33.9 C (-29.0 F)	tie	74 years	7 of 100 (Routine)
23 January 2026	Chippewa Valley Rgnl AP, US	daily low max	-24.4 C (-11.9 F)	3.9 C (7.0 F)	12 years	15 of 100 (Routine)
6 January 2026	Chippewa Valley Rgnl AP, US	daily rain	11.4 mm (0.4 in)	1.0 mm (0.04 in)	59 years	20 of 100 (Routine)
28 December 2025	Chippewa Valley Rgnl AP, US	daily rain	28.7 mm (1.1 in)	15.2 mm (0.6 in)	66 years	58 of 100 (Notable)
28 December 2025	Chippewa Valley Rgnl AP, US	daily snowfall	21.6 cm (8.5 in)	10.4 cm (4.1 in)	59 years	47 of 100 (Notable)
4 December 2025	Chippewa Valley Rgnl AP, US	daily low min (Tie)	-22.8 C (-9.0 F)	tie	75 years	7 of 100 (Routine)

Climate Trend

76 complete years, 1950 to 2025

One stripe for each of 76 complete years at Chippewa Valley Rgnl AP, 1950 to 2025. Blue stripes are years cooler than the station's own mean of 6.7 C (44.1 F); red stripes are warmer. The coolest year was 1950, at 4.5 C (40.0 F), and the warmest was 1998, at 9.3 C (48.8 F). The strongest colour marks a difference of 2.7 C (4.9 F).

Annual mean temperature at Chippewa Valley Rgnl AP as warming stripes, 1950 to 2025
Year	Annual mean temperature	Difference from the station mean
1950	4.5 C	-2.24 C
1951	4.5 C	-2.19 C
1952	6.4 C	-0.35 C
1953	6.8 C	+0.10 C
1954	6.6 C	-0.08 C
1955	6.2 C	-0.48 C
1956	5.7 C	-1.04 C
1957	6.0 C	-0.72 C
1958	6.1 C	-0.58 C
1959	6.2 C	-0.52 C
1960	6.3 C	-0.45 C
1961	6.3 C	-0.45 C
1962	5.7 C	-1.00 C
1963	6.4 C	-0.26 C
1964	7.1 C	+0.44 C
1965	5.5 C	-1.24 C
1966	5.7 C	-1.03 C
1967	5.4 C	-1.29 C
1968	6.7 C	-0.04 C
1969	6.0 C	-0.72 C
1970	6.1 C	-0.62 C
1971	6.1 C	-0.56 C
1972	4.8 C	-1.86 C
1973	7.4 C	+0.72 C
1974	6.3 C	-0.38 C
1975	6.4 C	-0.34 C
1976	5.8 C	-0.94 C
1977	6.7 C	+0.03 C
1978	5.6 C	-1.12 C
1979	5.2 C	-1.55 C
1980	6.2 C	-0.48 C
1981	7.0 C	+0.30 C
1982	6.0 C	-0.75 C
1983	6.9 C	+0.23 C
1984	6.9 C	+0.23 C
1985	5.9 C	-0.83 C
1986	6.9 C	+0.20 C
1987	8.7 C	+1.98 C
1988	7.0 C	+0.28 C
1989	5.5 C	-1.22 C
1990	7.6 C	+0.94 C
1991	7.2 C	+0.47 C
1992	6.8 C	+0.11 C
1993	5.9 C	-0.83 C
1994	6.8 C	+0.13 C
1995	6.7 C	+0.01 C
1996	5.3 C	-1.44 C
1997	6.8 C	+0.05 C
1998	9.3 C	+2.61 C
1999	8.1 C	+1.40 C
2000	7.0 C	+0.33 C
2001	7.7 C	+0.95 C
2002	7.6 C	+0.91 C
2003	6.9 C	+0.23 C
2004	7.0 C	+0.27 C
2005	8.0 C	+1.32 C
2006	8.8 C	+2.12 C
2007	7.6 C	+0.91 C
2008	5.7 C	-1.03 C
2009	6.2 C	-0.54 C
2010	7.8 C	+1.08 C
2011	7.1 C	+0.35 C
2012	9.2 C	+2.46 C
2013	5.9 C	-0.77 C
2014	5.2 C	-1.54 C
2015	7.8 C	+1.09 C
2016	8.5 C	+1.75 C
2017	7.4 C	+0.73 C
2018	6.4 C	-0.29 C
2019	5.9 C	-0.78 C
2020	7.7 C	+1.02 C
2021	8.4 C	+1.68 C
2022	6.5 C	-0.22 C
2023	8.7 C	+1.99 C
2024	9.3 C	+2.60 C
2025	7.5 C	+0.78 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1950 to 2025. In Fahrenheit: 0.5 F (0.3 to 0.7) per decade. The slope is a straight line fitted to 76 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Chippewa Valley Rgnl AP
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.2 to 0.4) per decade	0.5 F (0.3 to 0.7) per decade	1950 to 2025	76	Rise
Mean daily maximum	0.2 C (0.1 to 0.3) per decade	0.4 F (0.2 to 0.6) per decade	1950 to 2025	76	Rise
Mean daily minimum	0.3 C (0.2 to 0.4) per decade	0.6 F (0.4 to 0.8) per decade	1950 to 2025	76	Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1949 to 2026

Yearly extremes at Chippewa Valley Rgnl AP: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	1988	35.0 C (95.0 F)	78
Coldest night (TNn)	-42.8 C (-45.0 F)	1951	-31.0 C (-23.8 F)	78
Wettest day (Rx1day)	151.9 mm (6.0 in)	2000	55.3 mm (2.2 in)	78
Wettest five days (Rx5day)	203.6 mm (8.0 in)	2000	85.4 mm (3.4 in)	78
Longest dry spell (CDD)	59 days	1958	22 days	78

Hottest day (TXx)

The hottest day of the year at Chippewa Valley Rgnl AP, 1949 to 2026. The record is 40.0 C (104.0 F) in 1988, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Chippewa Valley Rgnl AP by year
Year	Hottest day (TXx)
1949	23.9 C (75.0 F)
1950	33.9 C (93.0 F)
1951	31.1 C (88.0 F)
1952	33.9 C (93.0 F)
1953	35.6 C (96.1 F)
1954	33.9 C (93.0 F)
1955	37.8 C (100.0 F)
1956	36.1 C (97.0 F)
1957	34.4 C (93.9 F)
1958	35.0 C (95.0 F)
1959	33.3 C (91.9 F)
1960	35.0 C (95.0 F)
1961	34.4 C (93.9 F)
1962	32.8 C (91.0 F)
1963	36.1 C (97.0 F)
1964	38.9 C (102.0 F)
1965	36.7 C (98.1 F)
1966	35.6 C (96.1 F)
1967	33.9 C (93.0 F)
1968	35.6 C (96.1 F)
1969	34.4 C (93.9 F)
1970	35.0 C (95.0 F)
1971	35.0 C (95.0 F)
1972	35.0 C (95.0 F)
1973	36.1 C (97.0 F)
1974	38.3 C (100.9 F)
1975	36.7 C (98.1 F)
1976	35.6 C (96.1 F)
1977	36.1 C (97.0 F)
1978	36.1 C (97.0 F)
1979	32.8 C (91.0 F)
1980	35.0 C (95.0 F)
1981	34.4 C (93.9 F)
1982	36.7 C (98.1 F)
1983	35.6 C (96.1 F)
1984	34.4 C (93.9 F)
1985	37.8 C (100.0 F)
1986	36.1 C (97.0 F)
1987	36.7 C (98.1 F)
1988	40.0 C (104.0 F)
1989	36.1 C (97.0 F)
1990	37.8 C (100.0 F)
1991	35.6 C (96.1 F)
1992	33.9 C (93.0 F)
1993	32.2 C (90.0 F)
1994	35.0 C (95.0 F)
1995	38.9 C (102.0 F)
1996	35.0 C (95.0 F)
1997	34.4 C (93.9 F)
1998	35.0 C (95.0 F)
1999	39.4 C (102.9 F)
2000	36.1 C (97.0 F)
2001	36.7 C (98.1 F)
2002	36.7 C (98.1 F)
2003	36.1 C (97.0 F)
2004	33.3 C (91.9 F)
2005	36.1 C (97.0 F)
2006	39.4 C (102.9 F)
2007	34.4 C (93.9 F)
2008	32.2 C (90.0 F)
2009	34.4 C (93.9 F)
2010	33.9 C (93.0 F)
2011	37.8 C (100.0 F)
2012	37.2 C (99.0 F)
2013	36.1 C (97.0 F)
2014	32.2 C (90.0 F)
2015	32.2 C (90.0 F)
2016	33.9 C (93.0 F)
2017	34.4 C (93.9 F)
2018	36.1 C (97.0 F)
2019	33.3 C (91.9 F)
2020	33.9 C (93.0 F)
2021	36.1 C (97.0 F)
2022	35.6 C (96.1 F)
2023	37.8 C (100.0 F)
2024	34.4 C (93.9 F)
2025	35.0 C (95.0 F)
2026	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Chippewa Valley Rgnl AP, 1949 to 2026. The record is -42.8 C (-45.0 F) in 1951, marked on the chart; the median year is -31.0 C (-23.8 F).

Coldest night (TNn) at Chippewa Valley Rgnl AP by year
Year	Coldest night (TNn)
1949	-22.8 C (-9.0 F)
1950	-38.3 C (-36.9 F)
1951	-42.8 C (-45.0 F)
1952	-33.9 C (-29.0 F)
1953	-28.9 C (-20.0 F)
1954	-34.4 C (-29.9 F)
1955	-31.7 C (-25.1 F)
1956	-30.6 C (-23.1 F)
1957	-33.9 C (-29.0 F)
1958	-29.4 C (-20.9 F)
1959	-30.6 C (-23.1 F)
1960	-27.8 C (-18.0 F)
1961	-33.9 C (-29.0 F)
1962	-37.2 C (-35.0 F)
1963	-35.6 C (-32.1 F)
1964	-27.8 C (-18.0 F)
1965	-33.9 C (-29.0 F)
1966	-33.3 C (-27.9 F)
1967	-37.8 C (-36.0 F)
1968	-32.8 C (-27.0 F)
1969	-31.7 C (-25.1 F)
1970	-34.4 C (-29.9 F)
1971	-33.3 C (-27.9 F)
1972	-35.6 C (-32.1 F)
1973	-31.7 C (-25.1 F)
1974	-31.7 C (-25.1 F)
1975	-31.1 C (-24.0 F)
1976	-31.7 C (-25.1 F)
1977	-39.4 C (-38.9 F)
1978	-28.9 C (-20.0 F)
1979	-35.0 C (-31.0 F)
1980	-27.8 C (-18.0 F)
1981	-29.4 C (-20.9 F)
1982	-35.6 C (-32.1 F)
1983	-35.6 C (-32.1 F)
1984	-34.4 C (-29.9 F)
1985	-34.4 C (-29.9 F)
1986	-30.6 C (-23.1 F)
1987	-30.0 C (-22.0 F)
1988	-32.2 C (-26.0 F)
1989	-32.8 C (-27.0 F)
1990	-30.6 C (-23.1 F)
1991	-26.1 C (-15.0 F)
1992	-26.7 C (-16.1 F)
1993	-26.7 C (-16.1 F)
1994	-36.1 C (-33.0 F)
1995	-25.6 C (-14.1 F)
1996	-37.2 C (-35.0 F)
1997	-28.3 C (-18.9 F)
1998	-28.9 C (-20.0 F)
1999	-28.9 C (-20.0 F)
2000	-32.2 C (-26.0 F)
2001	-25.6 C (-14.1 F)
2002	-21.7 C (-7.1 F)
2003	-26.7 C (-16.1 F)
2004	-30.0 C (-22.0 F)
2005	-25.0 C (-13.0 F)
2006	-27.2 C (-17.0 F)
2007	-30.0 C (-22.0 F)
2008	-28.9 C (-20.0 F)
2009	-32.2 C (-26.0 F)
2010	-30.0 C (-22.0 F)
2011	-31.7 C (-25.1 F)
2012	-25.6 C (-14.1 F)
2013	-28.8 C (-19.8 F)
2014	-31.6 C (-24.9 F)
2015	-29.9 C (-21.8 F)
2016	-29.3 C (-20.7 F)
2017	-27.7 C (-17.9 F)
2018	-31.0 C (-23.8 F)
2019	-34.3 C (-29.7 F)
2020	-26.6 C (-15.9 F)
2021	-32.1 C (-25.8 F)
2022	-29.3 C (-20.7 F)
2023	-28.2 C (-18.8 F)
2024	-24.3 C (-11.7 F)
2025	-31.0 C (-23.8 F)
2026	-33.9 C (-29.0 F)

Wettest day (Rx1day)

The wettest day of the year at Chippewa Valley Rgnl AP, 1949 to 2026. The record is 151.9 mm (6.0 in) in 2000, marked on the chart; the median year is 55.3 mm (2.2 in).

Wettest day (Rx1day) at Chippewa Valley Rgnl AP by year
Year	Wettest day (Rx1day)
1949	80.5 mm (3.2 in)
1950	47.8 mm (1.9 in)
1951	39.9 mm (1.6 in)
1952	35.1 mm (1.4 in)
1953	33.5 mm (1.3 in)
1954	57.4 mm (2.3 in)
1955	60.2 mm (2.4 in)
1956	56.6 mm (2.2 in)
1957	33.5 mm (1.3 in)
1958	52.8 mm (2.1 in)
1959	111.5 mm (4.4 in)
1960	40.4 mm (1.6 in)
1961	34.5 mm (1.4 in)
1962	51.8 mm (2.0 in)
1963	48.0 mm (1.9 in)
1964	54.9 mm (2.2 in)
1965	47.2 mm (1.9 in)
1966	52.3 mm (2.1 in)
1967	92.2 mm (3.6 in)
1968	52.3 mm (2.1 in)
1969	54.9 mm (2.2 in)
1970	46.7 mm (1.8 in)
1971	74.7 mm (2.9 in)
1972	44.7 mm (1.8 in)
1973	66.3 mm (2.6 in)
1974	52.1 mm (2.1 in)
1975	104.1 mm (4.1 in)
1976	27.7 mm (1.1 in)
1977	73.7 mm (2.9 in)
1978	95.0 mm (3.7 in)
1979	51.6 mm (2.0 in)
1980	85.6 mm (3.4 in)
1981	51.3 mm (2.0 in)
1982	51.8 mm (2.0 in)
1983	61.7 mm (2.4 in)
1984	52.3 mm (2.1 in)
1985	60.5 mm (2.4 in)
1986	104.6 mm (4.1 in)
1987	42.2 mm (1.7 in)
1988	59.9 mm (2.4 in)
1989	59.7 mm (2.4 in)
1990	61.0 mm (2.4 in)
1991	82.3 mm (3.2 in)
1992	60.5 mm (2.4 in)
1993	104.6 mm (4.1 in)
1994	37.8 mm (1.5 in)
1995	74.4 mm (2.9 in)
1996	37.8 mm (1.5 in)
1997	45.0 mm (1.8 in)
1998	52.8 mm (2.1 in)
1999	42.7 mm (1.7 in)
2000	151.9 mm (6.0 in)
2001	56.1 mm (2.2 in)
2002	76.2 mm (3.0 in)
2003	37.3 mm (1.5 in)
2004	40.6 mm (1.6 in)
2005	77.2 mm (3.0 in)
2006	43.4 mm (1.7 in)
2007	52.6 mm (2.1 in)
2008	58.9 mm (2.3 in)
2009	50.8 mm (2.0 in)
2010	71.9 mm (2.8 in)
2011	120.4 mm (4.7 in)
2012	41.9 mm (1.6 in)
2013	45.7 mm (1.8 in)
2014	51.3 mm (2.0 in)
2015	68.3 mm (2.7 in)
2016	125.5 mm (4.9 in)
2017	60.2 mm (2.4 in)
2018	77.7 mm (3.1 in)
2019	55.9 mm (2.2 in)
2020	68.3 mm (2.7 in)
2021	96.8 mm (3.8 in)
2022	67.6 mm (2.7 in)
2023	58.7 mm (2.3 in)
2024	55.6 mm (2.2 in)
2025	40.9 mm (1.6 in)
2026	41.1 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chippewa Valley Rgnl AP, 1949 to 2026. The record is 203.6 mm (8.0 in) in 2000, marked on the chart; the median year is 85.4 mm (3.4 in).

Wettest five days (Rx5day) at Chippewa Valley Rgnl AP by year
Year	Wettest five days (Rx5day)
1949	92.2 mm (3.6 in)
1950	52.0 mm (2.0 in)
1951	77.7 mm (3.1 in)
1952	59.7 mm (2.4 in)
1953	65.5 mm (2.6 in)
1954	91.2 mm (3.6 in)
1955	92.7 mm (3.6 in)
1956	88.6 mm (3.5 in)
1957	44.3 mm (1.7 in)
1958	88.6 mm (3.5 in)
1959	119.4 mm (4.7 in)
1960	53.8 mm (2.1 in)
1961	50.8 mm (2.0 in)
1962	111.5 mm (4.4 in)
1963	109.0 mm (4.3 in)
1964	99.7 mm (3.9 in)
1965	61.4 mm (2.4 in)
1966	75.4 mm (3.0 in)
1967	92.8 mm (3.7 in)
1968	106.4 mm (4.2 in)
1969	54.9 mm (2.2 in)
1970	67.6 mm (2.7 in)
1971	79.8 mm (3.1 in)
1972	65.8 mm (2.6 in)
1973	130.6 mm (5.1 in)
1974	67.1 mm (2.6 in)
1975	165.3 mm (6.5 in)
1976	55.9 mm (2.2 in)
1977	107.0 mm (4.2 in)
1978	193.6 mm (7.6 in)
1979	88.9 mm (3.5 in)
1980	160.9 mm (6.3 in)
1981	87.9 mm (3.5 in)
1982	69.9 mm (2.8 in)
1983	89.7 mm (3.5 in)
1984	84.3 mm (3.3 in)
1985	75.5 mm (3.0 in)
1986	119.6 mm (4.7 in)
1987	95.7 mm (3.8 in)
1988	81.0 mm (3.2 in)
1989	75.5 mm (3.0 in)
1990	110.3 mm (4.3 in)
1991	102.4 mm (4.0 in)
1992	67.5 mm (2.7 in)
1993	124.8 mm (4.9 in)
1994	95.2 mm (3.7 in)
1995	81.3 mm (3.2 in)
1996	54.8 mm (2.2 in)
1997	80.1 mm (3.2 in)
1998	126.5 mm (5.0 in)
1999	75.0 mm (3.0 in)
2000	203.6 mm (8.0 in)
2001	72.8 mm (2.9 in)
2002	102.1 mm (4.0 in)
2003	75.1 mm (3.0 in)
2004	67.3 mm (2.6 in)
2005	111.7 mm (4.4 in)
2006	86.4 mm (3.4 in)
2007	64.2 mm (2.5 in)
2008	66.1 mm (2.6 in)
2009	63.5 mm (2.5 in)
2010	95.1 mm (3.7 in)
2011	149.1 mm (5.9 in)
2012	70.2 mm (2.8 in)
2013	80.9 mm (3.2 in)
2014	108.1 mm (4.3 in)
2015	103.6 mm (4.1 in)
2016	145.3 mm (5.7 in)
2017	77.3 mm (3.0 in)
2018	103.4 mm (4.1 in)
2019	93.5 mm (3.7 in)
2020	68.3 mm (2.7 in)
2021	138.2 mm (5.4 in)
2022	79.3 mm (3.1 in)
2023	93.5 mm (3.7 in)
2024	70.3 mm (2.8 in)
2025	56.9 mm (2.2 in)
2026	63.9 mm (2.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chippewa Valley Rgnl AP, 1949 to 2026. The record is 59 days in 1958, marked on the chart; the median year is 22 days.

Longest dry spell (CDD) at Chippewa Valley Rgnl AP by year
Year	Longest dry spell (CDD)
1949	20 days
1950	20 days
1951	17 days
1952	32 days
1953	27 days
1954	25 days
1955	21 days
1956	20 days
1957	27 days
1958	59 days
1959	31 days
1960	26 days
1961	29 days
1962	18 days
1963	26 days
1964	37 days
1965	18 days
1966	25 days
1967	30 days
1968	27 days
1969	32 days
1970	26 days
1971	19 days
1972	21 days
1973	18 days
1974	19 days
1975	16 days
1976	52 days
1977	26 days
1978	35 days
1979	18 days
1980	30 days
1981	30 days
1982	23 days
1983	19 days
1984	21 days
1985	15 days
1986	20 days
1987	29 days
1988	28 days
1989	30 days
1990	16 days
1991	15 days
1992	18 days
1993	15 days
1994	21 days
1995	16 days
1996	18 days
1997	24 days
1998	28 days
1999	22 days
2000	21 days
2001	19 days
2002	28 days
2003	24 days
2004	20 days
2005	19 days
2006	23 days
2007	35 days
2008	19 days
2009	35 days
2010	30 days
2011	19 days
2012	24 days
2013	20 days
2014	16 days
2015	20 days
2016	19 days
2017	19 days
2018	19 days
2019	20 days
2020	35 days
2021	20 days
2022	17 days
2023	34 days
2024	32 days
2025	22 days
2026	27 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

76 years with a frost

Across 76 years with a frost, the median last spring frost at Chippewa Valley Rgnl AP falls on 11 May and the median first autumn frost on 29 September, which leaves a median of 145 days between them.

In 1996 to 2025 the median growing season was 146 days. That is 4 days more than in 1950 to 1979.

Fitted over all years, the growing season changes by +1.7 days per decade at this station.

Frost dates and growing season at Chippewa Valley Rgnl AP
Measure	Median, all years	Earliest period (1950 to 1979)	Recent period (1996 to 2025)	Recent against earliest	Fitted trend
Last spring frost	11 May	11 May	13 May	2 days later	+0.1 days per decade
First autumn frost	29 September	27 September	4 October	7 days later	+1.8 days per decade
Growing days	145 days	142 days	146 days	4 days more	+1.7 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

76 years, 1950 to 2025

A day with at least 55.6 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 153.2 mm (6.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Chippewa Valley Rgnl AP: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	55.6 mm (2.2 in)
5 years	75.1 mm (3.0 in)
10 years	90.3 mm (3.6 in)
25 years	112.7 mm (4.4 in)
50 years	131.8 mm (5.2 in)
100 years	153.2 mm (6.0 in)	Longer than the 76 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 76 years of values from 1950 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 151.9 mm (6.0 in) in 2000; 125.5 mm (4.9 in) in 2016; 120.4 mm (4.7 in) in 2011.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Climate Twins

2011 to 2025 against 1961 to 1990

Over 2011 to 2025, Chippewa Valley Rgnl AP had a mean temperature of 7.4 C (45.4 F) and 883.6 mm (34.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Oshkosh (United States, 251 km away), Brodhead Wwtp (United States, 302 km away) and Horicon Wwtp (United States, 278 km away).

Climate twins of Chippewa Valley Rgnl AP: stations whose 1961 to 1990 climate is closest to its 2011 to 2025 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
Oshkosh	United States	251 km (156 mi)	7.4 C (45.3 F)	785.8 mm (30.9 in)	0.74
Brodhead Wwtp	United States	302 km (188 mi)	7.7 C (45.8 F)	860.0 mm (33.9 in)	0.76
Horicon Wwtp	United States	278 km (173 mi)	7.5 C (45.5 F)	844.2 mm (33.2 in)	0.78

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Chippewa Valley Rgnl AP standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chippewa Valley Rgnl AP threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).