Clinton 1SSW Weather Records (USC00111743)

Record envelope, standing records and threshold days for Clinton 1SSW (USC00111743), Illinois, United States, with 117 years of record.

Key Facts for Clinton 1SSW

Clinton 1SSW (USC00111743) is a weather station in Illinois, United States at 40.14 latitude and -88.97 longitude, 212 m (695 ft) above sea level.
The station reports from 1910 to 2026, 117 years of record.
1,464 records set at Clinton 1SSW still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Clinton 1SSW set a daily record precipitation of 56.9 mm (2.2 in) on 18 June 2026.

About the Station

Location: Illinois, United States, 40.14 latitude, -88.97 longitude.
Elevation: 212 m (695 ft).
Period of record: 1910 to 2026, 117 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Clinton 1SSW. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Clinton 1SSW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.3 C (64.9 F)	-31.7 C (-25.1 F)	n/a	n/a
Feb	22.2 C (72.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Mar	30.0 C (86.0 F)	-22.2 C (-8.0 F)	n/a	n/a
Apr	33.3 C (91.9 F)	-7.8 C (18.0 F)	n/a	n/a
May	36.7 C (98.1 F)	-2.8 C (27.0 F)	n/a	n/a
Jun	40.6 C (105.1 F)	2.8 C (37.0 F)	n/a	n/a
Jul	40.6 C (105.1 F)	5.6 C (42.1 F)	n/a	n/a
Aug	39.4 C (102.9 F)	3.9 C (39.0 F)	n/a	n/a
Sep	38.3 C (100.9 F)	-4.4 C (24.1 F)	n/a	n/a
Oct	33.9 C (93.0 F)	-14.4 C (6.1 F)	n/a	n/a
Nov	26.7 C (80.1 F)	-20.0 C (-4.0 F)	n/a	n/a
Dec	19.4 C (66.9 F)	-30.0 C (-22.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Clinton 1SSW still stand. 1930 holds the most, with 87.

Standing records at Clinton 1SSW by the year they were set
Year set	Standing records
1910	65
1911	73
1912	66
1913	83
1914	70
1915	62
1916	78
1917	65
1918	67
1919	20
1920	46
1921	47
1922	41
1923	40
1924	65
1925	72
1926	42
1927	53
1928	57
1929	59
1930	87
1931	60
1932	56
1933	51
1934	39

Wettest Day of Each Month

Jun: 158.8 mm (6.3 in)

The wettest day on record for each calendar month at Clinton 1SSW. The most was 158.8 mm (6.3 in) on 24 June 1919.

Record daily precipitation for each month at Clinton 1SSW
Month	Record daily precipitation (mm)	Date
Jan	80.3 mm (3.2 in)	8 January 2008
Feb	71.1 mm (2.8 in)	10 February 1959
Mar	114.3 mm (4.5 in)	18 March 1933
Apr	134.1 mm (5.3 in)	12 April 1994
May	93.2 mm (3.7 in)	17 May 1995
Jun	158.8 mm (6.3 in)	24 June 1919
Jul	142.2 mm (5.6 in)	11 July 1958
Aug	108.0 mm (4.3 in)	29 August 1951
Sep	89.9 mm (3.5 in)	19 September 1986
Oct	100.1 mm (3.9 in)	1 October 1977
Nov	96.5 mm (3.8 in)	18 November 2003
Dec	93.7 mm (3.7 in)	2 December 1982

Period of Record Coverage

1910 to 1934

25 years of record at Clinton 1SSW, 1910 to 1934. 2 years have data for under 90 percent of days and are left out of rankings: 1919, 1934.

Days with data per year at Clinton 1SSW
Year	Days with data	Share of year	Complete
1910	363	99%	Yes
1911	364	100%	Yes
1912	361	99%	Yes
1913	364	100%	Yes
1914	364	100%	Yes
1915	364	100%	Yes
1916	364	99%	Yes
1917	360	99%	Yes
1918	363	99%	Yes
1919	328	90%	No
1920	335	92%	Yes
1921	361	99%	Yes
1922	354	97%	Yes
1923	351	96%	Yes
1924	363	99%	Yes
1925	357	98%	Yes
1926	349	96%	Yes
1927	350	96%	Yes
1928	356	97%	Yes
1929	356	98%	Yes
1930	358	98%	Yes
1931	361	99%	Yes
1932	355	97%	Yes
1933	365	100%	Yes
1934	150	41%	No

Latest Records

Latest records at Clinton 1SSW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 June 2026	Clinton 1SSW, US	daily rain	56.9 mm (2.2 in)	15.0 mm (0.6 in)	16 years	25 of 100 (Routine)
18 April 2026	Clinton 1SSW, US	daily rain	27.9 mm (1.1 in)	1.2 mm (0.05 in)	31 years	20 of 100 (Routine)
25 January 2026	Clinton 1SSW, US	daily snowfall	8.1 cm (3.2 in)	5.6 cm (2.2 in)	90 years	51 of 100 (Notable)
14 December 2025	Clinton 1SSW, US	daily snowfall	11.7 cm (4.6 in)	1.5 cm (0.6 in)	74 years	36 of 100 (Notable)
12 December 2025	Clinton 1SSW, US	daily snowfall	6.4 cm (2.5 in)	1.3 cm (0.5 in)	52 years	28 of 100 (Routine)
5 December 2025	Clinton 1SSW, US	daily snow depth (Tie)	10.2 cm (4.0 in)	tie	8 years	3 of 100 (Routine)
4 December 2025	Clinton 1SSW, US	daily snow depth	12.7 cm (5.0 in)	10.2 cm (4.0 in)	68 years	47 of 100 (Notable)
3 December 2025	Clinton 1SSW, US	daily snow depth	15.2 cm (6.0 in)	7.6 cm (3.0 in)	72 years	44 of 100 (Notable)
2 December 2025	Clinton 1SSW, US	daily snow depth	17.8 cm (7.0 in)	7.6 cm (3.0 in)	72 years	44 of 100 (Notable)
1 December 2025	Clinton 1SSW, US	daily snow depth	12.7 cm (5.0 in)	7.6 cm (3.0 in)	60 years	41 of 100 (Notable)
30 November 2025	Clinton 1SSW, US	daily snow depth	15.2 cm (6.0 in)	7.6 cm (3.0 in)	48 years	42 of 100 (Notable)
30 November 2025	Clinton 1SSW, US	daily snowfall	17.3 cm (6.8 in)	10.4 cm (4.1 in)	16 years	41 of 100 (Notable)
3 April 2025	Clinton 1SSW, US	daily rain	48.3 mm (1.9 in)	16.5 mm (0.6 in)	68 years	44 of 100 (Notable)
21 November 2024	Clinton 1SSW, US	daily snowfall	1.3 cm (0.5 in)	0.8 cm (0.3 in)	49 years	20 of 100 (Routine)
5 November 2024	Clinton 1SSW, US	daily rain	48.5 mm (1.9 in)	19.3 mm (0.8 in)	34 years	38 of 100 (Notable)
16 July 2024	Clinton 1SSW, US	daily rain	38.1 mm (1.5 in)	6.3 mm (0.25 in)	90 years	41 of 100 (Notable)
2 April 2024	Clinton 1SSW, US	daily rain	38.4 mm (1.5 in)	2.8 mm (0.11 in)	42 years	24 of 100 (Routine)
22 September 2023	Clinton 1SSW, US	daily rain	81.3 mm (3.2 in)	14.5 mm (0.6 in)	52 years	35 of 100 (Notable)
23 February 2023	Clinton 1SSW, US	daily rain	47.0 mm (1.9 in)	23.6 mm (0.9 in)	108 years	69 of 100 (Major)
25 January 2023	Clinton 1SSW, US	daily snowfall (Tie)	2.5 cm (1.0 in)	tie	87 years	9 of 100 (Routine)

Climate Trend

22 complete years, 1910 to 1933

One stripe for each of 22 complete years at Clinton 1SSW, 1910 to 1933. Blue stripes are years cooler than the station's own mean of 11.1 C (52.0 F); red stripes are warmer. The coolest year was 1924, at 9.5 C (49.1 F), and the warmest was 1921, at 13.1 C (55.6 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Clinton 1SSW as warming stripes, 1910 to 1933
Year	Annual mean temperature	Difference from the station mean
1910	11.0 C	-0.13 C
1911	11.9 C	+0.74 C
1912	10.1 C	-1.01 C
1913	12.0 C	+0.86 C
1914	11.5 C	+0.31 C
1915	10.9 C	-0.24 C
1916	11.0 C	-0.10 C
1917	9.6 C	-1.55 C
1918	11.2 C	+0.02 C
1921	13.1 C	+1.97 C
1922	11.5 C	+0.34 C
1923	11.1 C	-0.07 C
1924	9.5 C	-1.66 C
1925	10.8 C	-0.35 C
1926	10.0 C	-1.11 C
1927	11.0 C	-0.18 C
1928	10.9 C	-0.25 C
1929	9.9 C	-1.24 C
1930	11.7 C	+0.54 C
1931	12.9 C	+1.71 C
1932	11.3 C	+0.14 C
1933	12.3 C	+1.19 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1910 to 2026

Yearly extremes at Clinton 1SSW: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1930	37.2 C (99.0 F)	25
Coldest night (TNn)	-31.7 C (-25.1 F)	1927	-23.9 C (-11.0 F)	25
Wettest day (Rx1day)	158.8 mm (6.3 in)	1919	66.0 mm (2.6 in)	117
Wettest five days (Rx5day)	185.4 mm (7.3 in)	1919	101.4 mm (4.0 in)	117
Longest dry spell (CDD)	37 days	1999	20 days	117

Hottest day (TXx)

The hottest day of the year at Clinton 1SSW, 1910 to 2026. The record is 40.6 C (105.1 F) in 1930, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Clinton 1SSW by year
Year	Hottest day (TXx)
1910	36.1 C (97.0 F)
1911	38.9 C (102.0 F)
1912	35.6 C (96.1 F)
1913	40.0 C (104.0 F)
1914	38.3 C (100.9 F)
1915	32.8 C (91.0 F)
1916	40.0 C (104.0 F)
1917	36.7 C (98.1 F)
1918	38.9 C (102.0 F)
1919	37.2 C (99.0 F)
1920	35.6 C (96.1 F)
1921	37.8 C (100.0 F)
1922	36.7 C (98.1 F)
1923	37.2 C (99.0 F)
1924	35.6 C (96.1 F)
1925	38.9 C (102.0 F)
1926	37.2 C (99.0 F)
1927	36.1 C (97.0 F)
1928	35.0 C (95.0 F)
1929	34.4 C (93.9 F)
1930	40.6 C (105.1 F)
1931	38.9 C (102.0 F)
1932	37.2 C (99.0 F)
1933	38.3 C (100.9 F)
1934	40.6 C (105.1 F)
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
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1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
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1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
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1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
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2002	n/a
2003	n/a
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2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Clinton 1SSW, 1910 to 2026. The record is -31.7 C (-25.1 F) in 1927, marked on the chart; the median year is -23.9 C (-11.0 F).

Coldest night (TNn) at Clinton 1SSW by year
Year	Coldest night (TNn)
1910	-22.2 C (-8.0 F)
1911	-20.0 C (-4.0 F)
1912	-29.4 C (-20.9 F)
1913	-22.2 C (-8.0 F)
1914	-27.2 C (-17.0 F)
1915	-28.3 C (-18.9 F)
1916	-23.9 C (-11.0 F)
1917	-26.1 C (-15.0 F)
1918	-30.0 C (-22.0 F)
1919	-23.3 C (-9.9 F)
1920	-23.9 C (-11.0 F)
1921	-15.0 C (5.0 F)
1922	-23.3 C (-9.9 F)
1923	-21.1 C (-6.0 F)
1924	-30.0 C (-22.0 F)
1925	-21.1 C (-6.0 F)
1926	-19.4 C (-2.9 F)
1927	-31.7 C (-25.1 F)
1928	-26.1 C (-15.0 F)
1929	-23.3 C (-9.9 F)
1930	-28.9 C (-20.0 F)
1931	-17.2 C (1.0 F)
1932	-26.7 C (-16.1 F)
1933	-26.1 C (-15.0 F)
1934	-25.6 C (-14.1 F)
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
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1986	n/a
1987	n/a
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1989	n/a
1990	n/a
1991	n/a
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2011	n/a
2012	n/a
2013	n/a
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Clinton 1SSW, 1910 to 2026. The record is 158.8 mm (6.3 in) in 1919, marked on the chart; the median year is 66.0 mm (2.6 in).

Wettest day (Rx1day) at Clinton 1SSW by year
Year	Wettest day (Rx1day)
1910	43.2 mm (1.7 in)
1911	77.5 mm (3.1 in)
1912	56.6 mm (2.2 in)
1913	46.0 mm (1.8 in)
1914	42.7 mm (1.7 in)
1915	97.0 mm (3.8 in)
1916	52.8 mm (2.1 in)
1917	59.4 mm (2.3 in)
1918	114.0 mm (4.5 in)
1919	158.8 mm (6.3 in)
1920	73.7 mm (2.9 in)
1921	81.3 mm (3.2 in)
1922	57.2 mm (2.3 in)
1923	83.8 mm (3.3 in)
1924	82.6 mm (3.3 in)
1925	68.8 mm (2.7 in)
1926	99.3 mm (3.9 in)
1927	69.9 mm (2.8 in)
1928	44.5 mm (1.8 in)
1929	73.7 mm (2.9 in)
1930	45.7 mm (1.8 in)
1931	63.8 mm (2.5 in)
1932	38.1 mm (1.5 in)
1933	114.3 mm (4.5 in)
1934	44.5 mm (1.8 in)
1935	50.8 mm (2.0 in)
1936	53.3 mm (2.1 in)
1937	73.9 mm (2.9 in)
1938	55.9 mm (2.2 in)
1939	57.2 mm (2.3 in)
1940	57.9 mm (2.3 in)
1941	78.7 mm (3.1 in)
1942	67.1 mm (2.6 in)
1943	74.7 mm (2.9 in)
1944	76.2 mm (3.0 in)
1945	71.6 mm (2.8 in)
1946	74.9 mm (2.9 in)
1947	63.5 mm (2.5 in)
1948	54.6 mm (2.1 in)
1949	63.0 mm (2.5 in)
1950	47.5 mm (1.9 in)
1951	108.0 mm (4.3 in)
1952	74.4 mm (2.9 in)
1953	68.6 mm (2.7 in)
1954	75.2 mm (3.0 in)
1955	72.4 mm (2.9 in)
1956	90.2 mm (3.6 in)
1957	44.5 mm (1.8 in)
1958	142.2 mm (5.6 in)
1959	71.1 mm (2.8 in)
1960	50.3 mm (2.0 in)
1961	67.6 mm (2.7 in)
1962	76.2 mm (3.0 in)
1963	69.9 mm (2.8 in)
1964	65.5 mm (2.6 in)
1965	68.6 mm (2.7 in)
1966	61.7 mm (2.4 in)
1967	68.3 mm (2.7 in)
1968	108.0 mm (4.3 in)
1969	68.3 mm (2.7 in)
1970	66.8 mm (2.6 in)
1971	79.5 mm (3.1 in)
1972	54.4 mm (2.1 in)
1973	65.5 mm (2.6 in)
1974	78.2 mm (3.1 in)
1975	84.6 mm (3.3 in)
1976	48.0 mm (1.9 in)
1977	100.1 mm (3.9 in)
1978	47.5 mm (1.9 in)
1979	88.9 mm (3.5 in)
1980	41.9 mm (1.6 in)
1981	79.0 mm (3.1 in)
1982	108.5 mm (4.3 in)
1983	70.1 mm (2.8 in)
1984	45.7 mm (1.8 in)
1985	50.3 mm (2.0 in)
1986	89.9 mm (3.5 in)
1987	42.7 mm (1.7 in)
1988	59.4 mm (2.3 in)
1989	63.8 mm (2.5 in)
1990	63.2 mm (2.5 in)
1991	78.7 mm (3.1 in)
1992	66.5 mm (2.6 in)
1993	61.7 mm (2.4 in)
1994	134.1 mm (5.3 in)
1995	93.2 mm (3.7 in)
1996	45.7 mm (1.8 in)
1997	51.6 mm (2.0 in)
1998	41.1 mm (1.6 in)
1999	95.3 mm (3.8 in)
2000	63.2 mm (2.5 in)
2001	51.8 mm (2.0 in)
2002	66.0 mm (2.6 in)
2003	105.2 mm (4.1 in)
2004	60.5 mm (2.4 in)
2005	49.3 mm (1.9 in)
2006	74.4 mm (2.9 in)
2007	38.4 mm (1.5 in)
2008	85.1 mm (3.4 in)
2009	74.9 mm (2.9 in)
2010	53.3 mm (2.1 in)
2011	48.3 mm (1.9 in)
2012	61.2 mm (2.4 in)
2013	63.2 mm (2.5 in)
2014	55.9 mm (2.2 in)
2015	68.8 mm (2.7 in)
2016	59.2 mm (2.3 in)
2017	44.5 mm (1.8 in)
2018	58.7 mm (2.3 in)
2019	82.0 mm (3.2 in)
2020	75.2 mm (3.0 in)
2021	49.5 mm (1.9 in)
2022	47.5 mm (1.9 in)
2023	81.3 mm (3.2 in)
2024	48.5 mm (1.9 in)
2025	50.3 mm (2.0 in)
2026	56.9 mm (2.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Clinton 1SSW, 1910 to 2026. The record is 185.4 mm (7.3 in) in 1919, marked on the chart; the median year is 101.4 mm (4.0 in).

Wettest five days (Rx5day) at Clinton 1SSW by year
Year	Wettest five days (Rx5day)
1910	51.1 mm (2.0 in)
1911	115.4 mm (4.5 in)
1912	87.1 mm (3.4 in)
1913	161.1 mm (6.3 in)
1914	49.0 mm (1.9 in)
1915	155.1 mm (6.1 in)
1916	59.4 mm (2.3 in)
1917	81.8 mm (3.2 in)
1918	150.8 mm (5.9 in)
1919	185.4 mm (7.3 in)
1920	102.2 mm (4.0 in)
1921	103.6 mm (4.1 in)
1922	96.5 mm (3.8 in)
1923	144.7 mm (5.7 in)
1924	129.0 mm (5.1 in)
1925	97.2 mm (3.8 in)
1926	161.1 mm (6.3 in)
1927	147.5 mm (5.8 in)
1928	65.7 mm (2.6 in)
1929	87.5 mm (3.4 in)
1930	59.0 mm (2.3 in)
1931	82.1 mm (3.2 in)
1932	45.7 mm (1.8 in)
1933	139.7 mm (5.5 in)
1934	80.6 mm (3.2 in)
1935	113.1 mm (4.5 in)
1936	103.4 mm (4.1 in)
1937	75.6 mm (3.0 in)
1938	74.7 mm (2.9 in)
1939	98.8 mm (3.9 in)
1940	82.1 mm (3.2 in)
1941	150.4 mm (5.9 in)
1942	105.9 mm (4.2 in)
1943	134.4 mm (5.3 in)
1944	117.8 mm (4.6 in)
1945	73.9 mm (2.9 in)
1946	115.0 mm (4.5 in)
1947	83.1 mm (3.3 in)
1948	99.8 mm (3.9 in)
1949	102.2 mm (4.0 in)
1950	113.3 mm (4.5 in)
1951	128.8 mm (5.1 in)
1952	108.2 mm (4.3 in)
1953	101.1 mm (4.0 in)
1954	93.0 mm (3.7 in)
1955	107.5 mm (4.2 in)
1956	123.2 mm (4.9 in)
1957	98.6 mm (3.9 in)
1958	164.8 mm (6.5 in)
1959	100.0 mm (3.9 in)
1960	89.7 mm (3.5 in)
1961	118.4 mm (4.7 in)
1962	82.5 mm (3.2 in)
1963	78.6 mm (3.1 in)
1964	160.4 mm (6.3 in)
1965	108.0 mm (4.3 in)
1966	93.5 mm (3.7 in)
1967	95.8 mm (3.8 in)
1968	131.6 mm (5.2 in)
1969	175.0 mm (6.9 in)
1970	82.6 mm (3.3 in)
1971	110.5 mm (4.4 in)
1972	91.2 mm (3.6 in)
1973	105.1 mm (4.1 in)
1974	142.7 mm (5.6 in)
1975	123.8 mm (4.9 in)
1976	72.1 mm (2.8 in)
1977	143.3 mm (5.6 in)
1978	62.3 mm (2.5 in)
1979	126.2 mm (5.0 in)
1980	112.3 mm (4.4 in)
1981	116.6 mm (4.6 in)
1982	137.3 mm (5.4 in)
1983	102.4 mm (4.0 in)
1984	93.0 mm (3.7 in)
1985	73.9 mm (2.9 in)
1986	107.2 mm (4.2 in)
1987	75.4 mm (3.0 in)
1988	69.5 mm (2.7 in)
1989	128.8 mm (5.1 in)
1990	100.9 mm (4.0 in)
1991	113.0 mm (4.4 in)
1992	103.3 mm (4.1 in)
1993	76.2 mm (3.0 in)
1994	159.0 mm (6.3 in)
1995	127.2 mm (5.0 in)
1996	111.3 mm (4.4 in)
1997	85.8 mm (3.4 in)
1998	65.9 mm (2.6 in)
1999	101.1 mm (4.0 in)
2000	101.4 mm (4.0 in)
2001	83.0 mm (3.3 in)
2002	79.3 mm (3.1 in)
2003	136.2 mm (5.4 in)
2004	81.0 mm (3.2 in)
2005	84.6 mm (3.3 in)
2006	93.5 mm (3.7 in)
2007	72.1 mm (2.8 in)
2008	155.7 mm (6.1 in)
2009	101.4 mm (4.0 in)
2010	98.3 mm (3.9 in)
2011	72.1 mm (2.8 in)
2012	71.9 mm (2.8 in)
2013	102.3 mm (4.0 in)
2014	110.7 mm (4.4 in)
2015	138.8 mm (5.5 in)
2016	90.7 mm (3.6 in)
2017	82.7 mm (3.3 in)
2018	124.2 mm (4.9 in)
2019	116.1 mm (4.6 in)
2020	138.8 mm (5.5 in)
2021	127.2 mm (5.0 in)
2022	48.3 mm (1.9 in)
2023	98.6 mm (3.9 in)
2024	87.1 mm (3.4 in)
2025	84.6 mm (3.3 in)
2026	93.7 mm (3.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Clinton 1SSW, 1910 to 2026. The record is 37 days in 1999, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Clinton 1SSW by year
Year	Longest dry spell (CDD)
1910	26 days
1911	18 days
1912	17 days
1913	17 days
1914	22 days
1915	22 days
1916	23 days
1917	30 days
1918	12 days
1919	25 days
1920	19 days
1921	21 days
1922	19 days
1923	14 days
1924	23 days
1925	23 days
1926	17 days
1927	19 days
1928	18 days
1929	14 days
1930	22 days
1931	19 days
1932	21 days
1933	32 days
1934	24 days
1935	21 days
1936	32 days
1937	14 days
1938	23 days
1939	26 days
1940	20 days
1941	14 days
1942	16 days
1943	27 days
1944	22 days
1945	24 days
1946	16 days
1947	26 days
1948	20 days
1949	21 days
1950	19 days
1951	15 days
1952	24 days
1953	29 days
1954	22 days
1955	15 days
1956	32 days
1957	24 days
1958	22 days
1959	29 days
1960	19 days
1961	15 days
1962	19 days
1963	30 days
1964	26 days
1965	16 days
1966	19 days
1967	28 days
1968	17 days
1969	17 days
1970	15 days
1971	14 days
1972	18 days
1973	15 days
1974	29 days
1975	19 days
1976	25 days
1977	21 days
1978	20 days
1979	27 days
1980	25 days
1981	25 days
1982	16 days
1983	27 days
1984	15 days
1985	23 days
1986	33 days
1987	28 days
1988	32 days
1989	17 days
1990	17 days
1991	22 days
1992	26 days
1993	21 days
1994	19 days
1995	27 days
1996	20 days
1997	14 days
1998	20 days
1999	37 days
2000	15 days
2001	16 days
2002	26 days
2003	24 days
2004	20 days
2005	20 days
2006	17 days
2007	17 days
2008	18 days
2009	14 days
2010	16 days
2011	19 days
2012	13 days
2013	34 days
2014	11 days
2015	19 days
2016	13 days
2017	20 days
2018	15 days
2019	24 days
2020	26 days
2021	14 days
2022	16 days
2023	21 days
2024	19 days
2025	19 days
2026	24 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

22 years with a frost

Across 22 years with a frost, the median last spring frost at Clinton 1SSW falls on 29 April and the median first autumn frost on 15 October, which leaves a median of 172 days between them.

Frost dates and growing season at Clinton 1SSW
Measure	Median, all years	Earliest period	Recent period (1910 to 1933)	Recent against earliest	Fitted trend
Last spring frost	29 April	n/a	29 April	n/a	n/a
First autumn frost	15 October	n/a	15 October	n/a	n/a
Growing days	172 days	n/a	172 days	n/a	n/a

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

109 years, 1910 to 2025

A day with at least 64.5 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 142.8 mm (5.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Clinton 1SSW: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	64.5 mm (2.5 in)
5 years	83.5 mm (3.3 in)
10 years	96.8 mm (3.8 in)
25 years	114.5 mm (4.5 in)
50 years	128.4 mm (5.1 in)
100 years	142.8 mm (5.6 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 109 years of values from 1910 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: 158.8 mm (6.3 in) in 1919; 142.2 mm (5.6 in) in 1958; 134.1 mm (5.3 in) in 1994.

Download the Data

Data for Clinton 1SSW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Clinton 1SSW 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).