Mattoon Weather Records (USC00115430)

Record envelope, standing records and threshold days for Mattoon (USC00115430), Illinois, United States, with 134 years of record.

Key Facts for Mattoon

Mattoon (USC00115430) is a weather station in Illinois, United States at 39.47 latitude and -88.36 longitude, 213 m (700 ft) above sea level.
The station reports from 1893 to 2026, 134 years of record.
1,464 records set at Mattoon still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mattoon set a daily record precipitation of 16.8 mm (0.7 in) on 21 September 2026 (provisional).

Provisional Records

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

About the Station

Location: Illinois, United States, 39.47 latitude, -88.36 longitude.
Elevation: 213 m (700 ft).
Period of record: 1893 to 2026, 134 years.
Eligible elements: tmax, tmin, 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 Mattoon. 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 Mattoon, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	21.1 C (70.0 F)	-30.6 C (-23.1 F)	n/a	n/a
Feb	23.3 C (73.9 F)	-27.2 C (-17.0 F)	n/a	n/a
Mar	29.4 C (84.9 F)	-22.2 C (-8.0 F)	n/a	n/a
Apr	31.7 C (89.1 F)	-8.3 C (17.1 F)	n/a	n/a
May	35.0 C (95.0 F)	-2.2 C (28.0 F)	n/a	n/a
Jun	40.6 C (105.1 F)	2.2 C (36.0 F)	n/a	n/a
Jul	43.9 C (111.0 F)	7.8 C (46.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	4.4 C (39.9 F)	n/a	n/a
Sep	39.4 C (102.9 F)	-2.2 C (28.0 F)	n/a	n/a
Oct	33.3 C (91.9 F)	-7.2 C (19.0 F)	n/a	n/a
Nov	27.8 C (82.0 F)	-18.9 C (-2.0 F)	n/a	n/a
Dec	21.7 C (71.1 F)	-28.9 C (-20.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mattoon still stand. 1950 holds the most, with 45.

Standing records at Mattoon by the year they were set
Year set	Standing records
1893	14
1894	38
1895	21
1896	1
1897	11
1898	17
1899	41
1900	44
1901	33
1902	20
1903	34
1904	19
1905	34
1906	8
1948	9
1949	17
1950	45
1951	27
1952	30
1953	35
1954	32
1955	24
1956	17
1957	7
1958	16
1959	21
1960	35
1961	19
1962	26
1963	37
1964	20
1965	22
1966	28
1967	25
1968	17
1969	8
1970	20
1971	12
1972	18
1973	10
1974	22
1975	11
1976	20
1977	34
1978	11
1979	18
1980	24
1981	8
1982	16
1983	33
1984	19
1985	16
1986	21
1987	23
1988	31
1989	25
1990	27
1991	33
1992	16
1993	16
1994	13
1995	12
1996	20
1997	16
1998	22
1999	10
2000	15
2001	20

All-Time Record Progression

10 new records

10 all-time records were set at Mattoon between 15 January 1972 and 9 January 1997. Each dot is a new record.

When Mattoon set new all-time records
Date	Kind	Detail
1972-01-15	Record low maximum temperature	Record low maximum temperature -20.0 C (-4.0 F)
1977-01-16	Record low maximum temperature	Record low maximum temperature -21.1 C (-6.0 F)
1977-01-16	Record low minimum temperature	Record low minimum temperature -27.8 C (-18.0 F)
1977-01-17	Record low minimum temperature	Record low minimum temperature -28.3 C (-18.9 F)
1978-03-07	Record snow depth	Record snow depth 35.6 cm (14.0 in)
1978-03-08	Record snow depth	Record snow depth 43.2 cm (17.0 in)
1982-02-08	Record snow depth	Record snow depth 53.3 cm (21.0 in)
1983-12-24	Record low maximum temperature	Record low maximum temperature -22.8 C (-9.0 F)
1985-01-20	Record low minimum temperature	Record low minimum temperature -30.6 C (-23.1 F)
1997-01-09	Record daily snowfall	Record daily snowfall 27.9 cm (11.0 in)

Wettest Day of Each Month

Jul: 141.2 mm (5.6 in)

The wettest day on record for each calendar month at Mattoon. The most was 141.2 mm (5.6 in) on 21 July 1896.

Record daily precipitation for each month at Mattoon
Month	Record daily precipitation (mm)	Date
Jan	84.8 mm (3.3 in)	3 January 1950
Feb	73.2 mm (2.9 in)	14 February 1949
Mar	76.7 mm (3.0 in)	8 March 1964
Apr	77.7 mm (3.1 in)	7 April 2006
May	81.8 mm (3.2 in)	31 May 1902
Jun	121.2 mm (4.8 in)	11 June 2018
Jul	141.2 mm (5.6 in)	21 July 1896
Aug	123.4 mm (4.9 in)	26 August 1992
Sep	127.8 mm (5.0 in)	1 September 2003
Oct	94.0 mm (3.7 in)	11 October 2019
Nov	87.1 mm (3.4 in)	1 November 1992
Dec	103.4 mm (4.1 in)	27 December 2015

Period of Record Coverage

1893 to 2002

69 years of record at Mattoon, 1893 to 2002. 8 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1895, 1896, 1897, 1906, 1948, 2002.

Days with data per year at Mattoon
Year	Days with data	Share of year	Complete
1893	309	85%	No
1894	327	90%	No
1895	130	36%	No
1896	30	8%	No
1897	122	33%	No
1898	358	98%	Yes
1899	359	98%	Yes
1900	354	97%	Yes
1901	342	94%	Yes
1902	356	98%	Yes
1903	362	99%	Yes
1904	345	94%	Yes
1905	349	96%	Yes
1906	85	23%	No
1948	214	58%	No
1949	365	100%	Yes
1950	365	100%	Yes
1951	363	99%	Yes
1952	365	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	365	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	364	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	364	100%	Yes
1979	365	100%	Yes
1980	365	100%	Yes
1981	365	100%	Yes
1982	332	91%	Yes
1983	361	99%	Yes
1984	365	100%	Yes
1985	365	100%	Yes
1986	363	99%	Yes
1987	363	99%	Yes
1988	365	100%	Yes
1989	365	100%	Yes
1990	363	99%	Yes
1991	365	100%	Yes
1992	365	100%	Yes
1993	364	100%	Yes
1994	365	100%	Yes
1995	364	100%	Yes
1996	366	100%	Yes
1997	364	100%	Yes
1998	363	99%	Yes
1999	362	99%	Yes
2000	364	99%	Yes
2001	361	99%	Yes
2002	31	8%	No

Latest Records

Latest records at Mattoon
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 2026	Mattoon, US	daily rain (Provisional)	16.8 mm (0.7 in)	0.3 mm (0.01 in)	76 years	20 of 100 (Routine)
22 June 2026	Mattoon, US	daily rain	96.5 mm (3.8 in)	33.5 mm (1.3 in)	52 years	49 of 100 (Notable)
9 June 2026	Mattoon, US	daily rain	82.3 mm (3.2 in)	47.0 mm (1.9 in)	44 years	57 of 100 (Notable)
28 April 2026	Mattoon, US	daily rain	75.4 mm (3.0 in)	7.1 mm (0.28 in)	29 years	24 of 100 (Routine)
11 March 2026	Mattoon, US	daily rain	16.8 mm (0.7 in)	0.5 mm (0.02 in)	16 years	15 of 100 (Routine)
25 January 2026	Mattoon, US	daily snowfall	17.5 cm (6.9 in)	7.3 cm (2.9 in)	48 years	42 of 100 (Notable)
15 December 2025	Mattoon, US	daily snow depth (Tie)	12.7 cm (5.0 in)	tie	24 years	4 of 100 (Routine)
14 December 2025	Mattoon, US	daily snow depth (Tie)	12.7 cm (5.0 in)	tie	38 years	5 of 100 (Routine)
12 December 2025	Mattoon, US	daily snowfall	8.6 cm (3.4 in)	1.0 cm (0.4 in)	122 years	42 of 100 (Notable)
5 December 2025	Mattoon, US	daily snow depth	10.2 cm (4.0 in)	2.6 cm (1.0 in)	48 years	29 of 100 (Routine)
4 December 2025	Mattoon, US	daily snow depth	10.2 cm (4.0 in)	7.7 cm (3.0 in)	60 years	43 of 100 (Notable)
3 December 2025	Mattoon, US	daily snow depth	12.7 cm (5.0 in)	7.6 cm (3.0 in)	72 years	46 of 100 (Notable)
2 December 2025	Mattoon, US	daily snow depth	15.2 cm (6.0 in)	5.0 cm (2.0 in)	72 years	40 of 100 (Notable)
2 December 2025	Mattoon, US	daily snowfall	4.8 cm (1.9 in)	2.3 cm (0.9 in)	48 years	20 of 100 (Routine)
30 November 2025	Mattoon, US	daily snow depth	10.2 cm (4.0 in)	5.1 cm (2.0 in)	67 years	44 of 100 (Notable)
30 November 2025	Mattoon, US	daily snowfall	7.6 cm (3.0 in)	1.2 cm (0.5 in)	58 years	30 of 100 (Routine)
19 October 2025	Mattoon, US	daily rain	72.9 mm (2.9 in)	29.2 mm (1.1 in)	20 years	37 of 100 (Notable)
30 June 2025	Mattoon, US	daily rain	25.4 mm (1.0 in)	2.5 mm (0.10 in)	129 years	41 of 100 (Notable)
5 April 2025	Mattoon, US	daily rain	73.9 mm (2.9 in)	27.2 mm (1.1 in)	12 years	36 of 100 (Notable)
10 July 2024	Mattoon, US	daily rain	94.0 mm (3.7 in)	8.1 mm (0.32 in)	21 years	21 of 100 (Routine)

Climate Trend

58 complete years, 1894 to 2001

One stripe for each of 58 complete years at Mattoon, 1894 to 2001. Blue stripes are years cooler than the station's own mean of 11.6 C (52.9 F); red stripes are warmer. The coolest year was 1979, at 10.1 C (50.1 F), and the warmest was 1998, at 13.6 C (56.4 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Mattoon as warming stripes, 1894 to 2001
Year	Annual mean temperature	Difference from the station mean
1894	13.4 C	+1.78 C
1898	12.0 C	+0.38 C
1899	12.1 C	+0.48 C
1902	12.0 C	+0.37 C
1903	11.7 C	+0.08 C
1905	13.5 C	+1.92 C
1949	12.1 C	+0.50 C
1950	10.5 C	-1.14 C
1951	10.6 C	-0.96 C
1952	12.2 C	+0.59 C
1953	12.7 C	+1.06 C
1954	12.8 C	+1.23 C
1955	11.9 C	+0.32 C
1956	12.0 C	+0.39 C
1957	11.7 C	+0.07 C
1958	10.5 C	-1.08 C
1959	11.6 C	+0.03 C
1960	10.8 C	-0.80 C
1961	11.3 C	-0.35 C
1962	11.2 C	-0.43 C
1963	10.7 C	-0.88 C
1964	11.9 C	+0.31 C
1965	11.7 C	+0.09 C
1966	10.9 C	-0.74 C
1967	10.8 C	-0.78 C
1968	11.1 C	-0.52 C
1969	10.8 C	-0.78 C
1970	11.1 C	-0.47 C
1971	11.8 C	+0.22 C
1972	11.0 C	-0.65 C
1973	12.4 C	+0.75 C
1974	11.4 C	-0.16 C
1975	11.8 C	+0.18 C
1976	10.7 C	-0.86 C
1977	11.4 C	-0.16 C
1978	10.3 C	-1.31 C
1979	10.1 C	-1.54 C
1980	11.1 C	-0.49 C
1981	11.2 C	-0.40 C
1983	11.6 C	+0.00 C
1984	11.5 C	-0.08 C
1985	10.8 C	-0.84 C
1986	11.8 C	+0.24 C
1987	12.6 C	+0.95 C
1988	12.0 C	+0.39 C
1989	11.0 C	-0.64 C
1990	12.6 C	+0.97 C
1991	12.4 C	+0.84 C
1992	11.4 C	-0.22 C
1993	10.8 C	-0.85 C
1994	11.4 C	-0.21 C
1995	11.3 C	-0.30 C
1996	10.8 C	-0.82 C
1997	11.2 C	-0.38 C
1998	13.6 C	+1.95 C
1999	12.8 C	+1.24 C
2000	11.8 C	+0.17 C
2001	12.7 C	+1.11 C

The fitted trend in annual mean temperature here over 1894 to 2001 is -0.07 C (-0.14 to 0.01) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.12 F (-0.26 to 0.02) per decade. The slope is a straight line fitted to 58 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Mattoon
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.07 C (-0.14 to 0.01) per decade	-0.12 F (-0.26 to 0.02) per decade	1894 to 2001	58	Not clearly different from zero
Mean daily maximum	-0.06 C (-0.14 to 0.03) per decade	-0.1 F (-0.3 to 0.1) per decade	1894 to 2001	58	Not clearly different from zero
Mean daily minimum	-0.07 C (-0.16 to 0.01) per decade	-0.13 F (-0.29 to 0.02) per decade	1894 to 2001	58	Not clearly different from zero

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

1893 to 2026

Yearly extremes at Mattoon: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.9 C (111.0 F)	1954	36.1 C (97.0 F)	69
Coldest night (TNn)	-30.6 C (-23.1 F)	1985	-21.7 C (-7.1 F)	69
Wettest day (Rx1day)	141.2 mm (5.6 in)	1896	66.3 mm (2.6 in)	93
Wettest five days (Rx5day)	193.4 mm (7.6 in)	2021	98.5 mm (3.9 in)	93
Longest dry spell (CDD)	36 days	1904	20 days	93

Hottest day (TXx)

The hottest day of the year at Mattoon, 1893 to 2026. The record is 43.9 C (111.0 F) in 1954, marked on the chart; the median year is 36.1 C (97.0 F).

Hottest day (TXx) at Mattoon by year
Year	Hottest day (TXx)
1893	36.7 C (98.1 F)
1894	36.7 C (98.1 F)
1895	37.2 C (99.0 F)
1896	14.4 C (57.9 F)
1897	35.0 C (95.0 F)
1898	37.8 C (100.0 F)
1899	36.7 C (98.1 F)
1900	35.6 C (96.1 F)
1901	41.1 C (106.0 F)
1902	33.3 C (91.9 F)
1903	33.3 C (91.9 F)
1904	32.8 C (91.0 F)
1905	35.0 C (95.0 F)
1906	20.6 C (69.1 F)
1948	36.1 C (97.0 F)
1949	36.1 C (97.0 F)
1950	33.3 C (91.9 F)
1951	35.6 C (96.1 F)
1952	38.3 C (100.9 F)
1953	38.9 C (102.0 F)
1954	43.9 C (111.0 F)
1955	37.2 C (99.0 F)
1956	36.7 C (98.1 F)
1957	35.0 C (95.0 F)
1958	33.9 C (93.0 F)
1959	36.1 C (97.0 F)
1960	36.7 C (98.1 F)
1961	35.0 C (95.0 F)
1962	36.7 C (98.1 F)
1963	35.0 C (95.0 F)
1964	38.9 C (102.0 F)
1965	35.0 C (95.0 F)
1966	38.9 C (102.0 F)
1967	33.3 C (91.9 F)
1968	35.6 C (96.1 F)
1969	35.0 C (95.0 F)
1970	36.1 C (97.0 F)
1971	36.1 C (97.0 F)
1972	35.0 C (95.0 F)
1973	35.0 C (95.0 F)
1974	36.7 C (98.1 F)
1975	35.0 C (95.0 F)
1976	35.6 C (96.1 F)
1977	36.7 C (98.1 F)
1978	35.6 C (96.1 F)
1979	33.9 C (93.0 F)
1980	38.3 C (100.9 F)
1981	35.6 C (96.1 F)
1982	35.0 C (95.0 F)
1983	39.4 C (102.9 F)
1984	36.7 C (98.1 F)
1985	35.6 C (96.1 F)
1986	36.1 C (97.0 F)
1987	37.8 C (100.0 F)
1988	40.0 C (104.0 F)
1989	36.1 C (97.0 F)
1990	37.2 C (99.0 F)
1991	36.1 C (97.0 F)
1992	35.6 C (96.1 F)
1993	33.9 C (93.0 F)
1994	36.7 C (98.1 F)
1995	36.1 C (97.0 F)
1996	34.4 C (93.9 F)
1997	36.1 C (97.0 F)
1998	35.6 C (96.1 F)
1999	37.8 C (100.0 F)
2000	35.0 C (95.0 F)
2001	35.0 C (95.0 F)
2002	17.8 C (64.0 F)
2003	n/a
2004	n/a
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 Mattoon, 1893 to 2026. The record is -30.6 C (-23.1 F) in 1985, marked on the chart; the median year is -21.7 C (-7.1 F).

Coldest night (TNn) at Mattoon by year
Year	Coldest night (TNn)
1893	-20.6 C (-5.1 F)
1894	-22.8 C (-9.0 F)
1895	-12.2 C (10.0 F)
1896	-15.0 C (5.0 F)
1897	-17.2 C (1.0 F)
1898	-19.4 C (-2.9 F)
1899	-26.7 C (-16.1 F)
1900	-17.8 C (0.0 F)
1901	-21.7 C (-7.1 F)
1902	-20.6 C (-5.1 F)
1903	-22.2 C (-8.0 F)
1904	-21.1 C (-6.0 F)
1905	-24.4 C (-11.9 F)
1906	-17.2 C (1.0 F)
1948	-17.8 C (0.0 F)
1949	-18.9 C (-2.0 F)
1950	-20.0 C (-4.0 F)
1951	-23.9 C (-11.0 F)
1952	-15.6 C (3.9 F)
1953	-17.2 C (1.0 F)
1954	-17.8 C (0.0 F)
1955	-22.2 C (-8.0 F)
1956	-17.8 C (0.0 F)
1957	-21.7 C (-7.1 F)
1958	-21.7 C (-7.1 F)
1959	-22.2 C (-8.0 F)
1960	-23.9 C (-11.0 F)
1961	-20.0 C (-4.0 F)
1962	-24.4 C (-11.9 F)
1963	-26.1 C (-15.0 F)
1964	-16.7 C (1.9 F)
1965	-23.3 C (-9.9 F)
1966	-23.9 C (-11.0 F)
1967	-23.9 C (-11.0 F)
1968	-25.0 C (-13.0 F)
1969	-20.6 C (-5.1 F)
1970	-24.4 C (-11.9 F)
1971	-22.2 C (-8.0 F)
1972	-25.0 C (-13.0 F)
1973	-22.8 C (-9.0 F)
1974	-22.8 C (-9.0 F)
1975	-18.9 C (-2.0 F)
1976	-21.7 C (-7.1 F)
1977	-28.3 C (-18.9 F)
1978	-20.6 C (-5.1 F)
1979	-23.9 C (-11.0 F)
1980	-20.6 C (-5.1 F)
1981	-21.7 C (-7.1 F)
1982	-27.8 C (-18.0 F)
1983	-26.7 C (-16.1 F)
1984	-25.6 C (-14.1 F)
1985	-30.6 C (-23.1 F)
1986	-21.1 C (-6.0 F)
1987	-20.0 C (-4.0 F)
1988	-21.7 C (-7.1 F)
1989	-28.9 C (-20.0 F)
1990	-19.4 C (-2.9 F)
1991	-17.2 C (1.0 F)
1992	-20.0 C (-4.0 F)
1993	-22.8 C (-9.0 F)
1994	-28.9 C (-20.0 F)
1995	-18.3 C (-0.9 F)
1996	-27.2 C (-17.0 F)
1997	-23.3 C (-9.9 F)
1998	-18.3 C (-0.9 F)
1999	-23.9 C (-11.0 F)
2000	-18.9 C (-2.0 F)
2001	-17.2 C (1.0 F)
2002	-13.3 C (8.1 F)
2003	n/a
2004	n/a
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

Wettest day (Rx1day)

The wettest day of the year at Mattoon, 1893 to 2026. The record is 141.2 mm (5.6 in) in 1896, marked on the chart; the median year is 66.3 mm (2.6 in).

Wettest day (Rx1day) at Mattoon by year
Year	Wettest day (Rx1day)
1893	69.9 mm (2.8 in)
1894	55.6 mm (2.2 in)
1895	36.8 mm (1.4 in)
1896	141.2 mm (5.6 in)
1897	48.5 mm (1.9 in)
1898	44.5 mm (1.8 in)
1899	74.9 mm (2.9 in)
1900	37.6 mm (1.5 in)
1901	66.3 mm (2.6 in)
1902	81.8 mm (3.2 in)
1903	48.0 mm (1.9 in)
1904	76.2 mm (3.0 in)
1905	78.7 mm (3.1 in)
1906	30.5 mm (1.2 in)
1948	48.8 mm (1.9 in)
1949	81.8 mm (3.2 in)
1950	84.8 mm (3.3 in)
1951	95.5 mm (3.8 in)
1952	44.7 mm (1.8 in)
1953	71.4 mm (2.8 in)
1954	48.8 mm (1.9 in)
1955	83.8 mm (3.3 in)
1956	41.7 mm (1.6 in)
1957	100.3 mm (3.9 in)
1958	49.8 mm (2.0 in)
1959	45.2 mm (1.8 in)
1960	49.5 mm (1.9 in)
1961	99.8 mm (3.9 in)
1962	53.6 mm (2.1 in)
1963	61.5 mm (2.4 in)
1964	76.7 mm (3.0 in)
1965	65.3 mm (2.6 in)
1966	77.2 mm (3.0 in)
1967	66.0 mm (2.6 in)
1968	74.9 mm (2.9 in)
1969	95.0 mm (3.7 in)
1970	47.0 mm (1.9 in)
1971	70.1 mm (2.8 in)
1972	55.9 mm (2.2 in)
1973	97.8 mm (3.9 in)
1974	63.0 mm (2.5 in)
1975	57.2 mm (2.3 in)
1976	36.8 mm (1.4 in)
1977	47.5 mm (1.9 in)
1978	56.6 mm (2.2 in)
1979	84.8 mm (3.3 in)
1980	88.1 mm (3.5 in)
1981	78.2 mm (3.1 in)
1982	75.7 mm (3.0 in)
1983	55.4 mm (2.2 in)
1984	67.1 mm (2.6 in)
1985	57.2 mm (2.3 in)
1986	76.2 mm (3.0 in)
1987	45.5 mm (1.8 in)
1988	41.9 mm (1.6 in)
1989	64.8 mm (2.6 in)
1990	63.0 mm (2.5 in)
1991	55.1 mm (2.2 in)
1992	123.4 mm (4.9 in)
1993	73.4 mm (2.9 in)
1994	50.8 mm (2.0 in)
1995	48.8 mm (1.9 in)
1996	68.3 mm (2.7 in)
1997	71.9 mm (2.8 in)
1998	42.7 mm (1.7 in)
1999	89.2 mm (3.5 in)
2000	71.6 mm (2.8 in)
2001	86.4 mm (3.4 in)
2002	65.3 mm (2.6 in)
2003	127.8 mm (5.0 in)
2004	57.9 mm (2.3 in)
2005	49.5 mm (1.9 in)
2006	77.7 mm (3.1 in)
2007	65.5 mm (2.6 in)
2008	78.7 mm (3.1 in)
2009	57.2 mm (2.3 in)
2010	75.2 mm (3.0 in)
2011	58.2 mm (2.3 in)
2012	55.1 mm (2.2 in)
2013	75.2 mm (3.0 in)
2014	55.6 mm (2.2 in)
2015	103.4 mm (4.1 in)
2016	77.2 mm (3.0 in)
2017	58.4 mm (2.3 in)
2018	121.2 mm (4.8 in)
2019	94.0 mm (3.7 in)
2020	90.7 mm (3.6 in)
2021	101.1 mm (4.0 in)
2022	66.0 mm (2.6 in)
2023	45.5 mm (1.8 in)
2024	94.0 mm (3.7 in)
2025	73.9 mm (2.9 in)
2026	96.5 mm (3.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mattoon, 1893 to 2026. The record is 193.4 mm (7.6 in) in 2021, marked on the chart; the median year is 98.5 mm (3.9 in).

Wettest five days (Rx5day) at Mattoon by year
Year	Wettest five days (Rx5day)
1893	96.5 mm (3.8 in)
1894	92.0 mm (3.6 in)
1895	55.9 mm (2.2 in)
1896	141.2 mm (5.6 in)
1897	76.7 mm (3.0 in)
1898	86.6 mm (3.4 in)
1899	85.6 mm (3.4 in)
1900	114.6 mm (4.5 in)
1901	68.9 mm (2.7 in)
1902	98.6 mm (3.9 in)
1903	82.8 mm (3.3 in)
1904	108.9 mm (4.3 in)
1905	65.0 mm (2.6 in)
1906	47.5 mm (1.9 in)
1948	78.0 mm (3.1 in)
1949	84.1 mm (3.3 in)
1950	130.8 mm (5.1 in)
1951	135.4 mm (5.3 in)
1952	73.2 mm (2.9 in)
1953	77.5 mm (3.1 in)
1954	78.5 mm (3.1 in)
1955	103.1 mm (4.1 in)
1956	69.8 mm (2.7 in)
1957	182.8 mm (7.2 in)
1958	102.9 mm (4.1 in)
1959	55.6 mm (2.2 in)
1960	98.0 mm (3.9 in)
1961	163.1 mm (6.4 in)
1962	71.1 mm (2.8 in)
1963	72.7 mm (2.9 in)
1964	92.9 mm (3.7 in)
1965	77.5 mm (3.1 in)
1966	146.3 mm (5.8 in)
1967	88.8 mm (3.5 in)
1968	138.1 mm (5.4 in)
1969	168.4 mm (6.6 in)
1970	86.4 mm (3.4 in)
1971	98.5 mm (3.9 in)
1972	84.5 mm (3.3 in)
1973	153.1 mm (6.0 in)
1974	98.5 mm (3.9 in)
1975	104.7 mm (4.1 in)
1976	45.7 mm (1.8 in)
1977	66.2 mm (2.6 in)
1978	83.5 mm (3.3 in)
1979	148.8 mm (5.9 in)
1980	98.7 mm (3.9 in)
1981	78.2 mm (3.1 in)
1982	105.9 mm (4.2 in)
1983	138.7 mm (5.5 in)
1984	81.3 mm (3.2 in)
1985	112.6 mm (4.4 in)
1986	117.1 mm (4.6 in)
1987	100.8 mm (4.0 in)
1988	59.7 mm (2.4 in)
1989	98.5 mm (3.9 in)
1990	126.5 mm (5.0 in)
1991	88.2 mm (3.5 in)
1992	153.6 mm (6.0 in)
1993	115.8 mm (4.6 in)
1994	94.4 mm (3.7 in)
1995	80.7 mm (3.2 in)
1996	94.4 mm (3.7 in)
1997	81.0 mm (3.2 in)
1998	83.7 mm (3.3 in)
1999	113.0 mm (4.4 in)
2000	109.0 mm (4.3 in)
2001	151.4 mm (6.0 in)
2002	120.1 mm (4.7 in)
2003	176.4 mm (6.9 in)
2004	114.3 mm (4.5 in)
2005	92.3 mm (3.6 in)
2006	109.2 mm (4.3 in)
2007	83.8 mm (3.3 in)
2008	113.2 mm (4.5 in)
2009	76.9 mm (3.0 in)
2010	96.8 mm (3.8 in)
2011	99.3 mm (3.9 in)
2012	79.5 mm (3.1 in)
2013	125.5 mm (4.9 in)
2014	87.3 mm (3.4 in)
2015	163.3 mm (6.4 in)
2016	113.4 mm (4.5 in)
2017	141.5 mm (5.6 in)
2018	186.7 mm (7.4 in)
2019	105.9 mm (4.2 in)
2020	119.9 mm (4.7 in)
2021	193.4 mm (7.6 in)
2022	85.1 mm (3.4 in)
2023	87.6 mm (3.4 in)
2024	107.8 mm (4.2 in)
2025	106.2 mm (4.2 in)
2026	123.2 mm (4.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mattoon, 1893 to 2026. The record is 36 days in 1904, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Mattoon by year
Year	Longest dry spell (CDD)
1893	28 days
1894	22 days
1895	16 days
1896	21 days
1897	24 days
1898	16 days
1899	19 days
1900	23 days
1901	24 days
1902	25 days
1903	17 days
1904	36 days
1905	20 days
1906	12 days
1948	15 days
1949	21 days
1950	19 days
1951	14 days
1952	25 days
1953	24 days
1954	33 days
1955	30 days
1956	31 days
1957	23 days
1958	32 days
1959	22 days
1960	18 days
1961	19 days
1962	16 days
1963	36 days
1964	27 days
1965	22 days
1966	19 days
1967	20 days
1968	30 days
1969	18 days
1970	16 days
1971	21 days
1972	14 days
1973	18 days
1974	21 days
1975	12 days
1976	25 days
1977	16 days
1978	17 days
1979	24 days
1980	15 days
1981	25 days
1982	18 days
1983	30 days
1984	15 days
1985	18 days
1986	31 days
1987	20 days
1988	32 days
1989	27 days
1990	17 days
1991	23 days
1992	29 days
1993	20 days
1994	22 days
1995	24 days
1996	26 days
1997	18 days
1998	15 days
1999	24 days
2000	20 days
2001	16 days
2002	26 days
2003	26 days
2004	18 days
2005	20 days
2006	18 days
2007	15 days
2008	17 days
2009	17 days
2010	22 days
2011	16 days
2012	18 days
2013	19 days
2014	15 days
2015	26 days
2016	14 days
2017	19 days
2018	12 days
2019	20 days
2020	21 days
2021	14 days
2022	12 days
2023	21 days
2024	32 days
2025	26 days
2026	20 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

58 years with a frost

Across 58 years with a frost, the median last spring frost at Mattoon falls on 16 April and the median first autumn frost on 18 October, which leaves a median of 183 days between them.

Fitted over all years, the growing season changes by 0.0 days per decade at this station.

Frost dates and growing season at Mattoon
Measure	Median, all years	Earliest period	Recent period (1971 to 2001)	Recent against earliest	Fitted trend
Last spring frost	16 April	n/a	14 April	n/a	0.0 days per decade
First autumn frost	18 October	n/a	18 October	n/a	-0.1 days per decade
Growing days	183 days	n/a	183 days	n/a	0.0 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

78 years, 1898 to 2025

A day with at least 67.0 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 131.2 mm (5.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Mattoon: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	67.0 mm (2.6 in)
5 years	85.5 mm (3.4 in)
10 years	97.2 mm (3.8 in)
25 years	111.4 mm (4.4 in)
50 years	121.5 mm (4.8 in)
100 years	131.2 mm (5.2 in)	Longer than the 78 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, 78 years of values from 1898 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: 127.8 mm (5.0 in) in 2003; 123.4 mm (4.9 in) in 1992; 121.2 mm (4.8 in) in 2018.

Station Changes

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

Download the Data

Data for Mattoon standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mattoon 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).