Chester Weather Records (USC00111491)

Record envelope, standing records and threshold days for Chester (USC00111491), Illinois, United States, with 122 years of record.

Key Facts for Chester

Chester (USC00111491) is a weather station in Illinois, United States at 37.90 latitude and -89.83 longitude, 119 m (390 ft) above sea level.
The station reports from 1905 to 2026, 122 years of record.
1,464 records set at Chester still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Chester set a daily record precipitation of 46.5 mm (1.8 in) on 13 August 2026.

About the Station

Location: Illinois, United States, 37.90 latitude, -89.83 longitude.
Elevation: 119 m (390 ft).
Period of record: 1905 to 2026, 122 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 Chester. 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 Chester, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	22.8 C (73.0 F)	-17.8 C (0.0 F)	n/a	n/a
Feb	22.2 C (72.0 F)	-15.6 C (3.9 F)	n/a	n/a
Mar	32.2 C (90.0 F)	-8.9 C (16.0 F)	n/a	n/a
Apr	33.9 C (93.0 F)	-4.4 C (24.1 F)	n/a	n/a
May	33.9 C (93.0 F)	2.2 C (36.0 F)	n/a	n/a
Jun	40.0 C (104.0 F)	10.6 C (51.1 F)	n/a	n/a
Jul	38.9 C (102.0 F)	13.9 C (57.0 F)	n/a	n/a
Aug	39.4 C (102.9 F)	13.3 C (55.9 F)	n/a	n/a
Sep	36.1 C (97.0 F)	4.4 C (39.9 F)	n/a	n/a
Oct	32.8 C (91.0 F)	-2.8 C (27.0 F)	n/a	n/a
Nov	27.8 C (82.0 F)	-7.8 C (18.0 F)	n/a	n/a
Dec	23.3 C (73.9 F)	-9.4 C (15.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Chester still stand. 1907 holds the most, with 313.

All-Time Record Progression

6 new records

6 all-time records were set at Chester between 17 January 1978 and 18 September 1986. Each dot is a new record.

When Chester set new all-time records
Date	Kind	Detail
1978-01-17	Record snow depth	Record snow depth 30.5 cm (12.0 in)
1978-01-20	Record snow depth	Record snow depth 33.0 cm (13.0 in)
1982-02-03	Record snow depth	Record snow depth 35.6 cm (14.0 in)
1982-02-04	Record snow depth	Record snow depth 43.2 cm (17.0 in)
1982-02-10	Record snow depth	Record snow depth 48.3 cm (19.0 in)
1986-09-18	Record daily precipitation	Record daily precipitation 200.7 mm (7.9 in)

Wettest Day of Each Month

Sep: 200.7 mm (7.9 in)

The wettest day on record for each calendar month at Chester. The most was 200.7 mm (7.9 in) on 18 September 1986.

Record daily precipitation for each month at Chester
Month	Record daily precipitation (mm)	Date
Jan	91.4 mm (3.6 in)	31 January 1982
Feb	60.2 mm (2.4 in)	17 February 2022
Mar	113.8 mm (4.5 in)	19 March 2008
Apr	89.7 mm (3.5 in)	29 April 2017
May	106.7 mm (4.2 in)	18 May 1995
Jun	114.3 mm (4.5 in)	17 June 2000
Jul	170.7 mm (6.7 in)	5 July 2007
Aug	127.0 mm (5.0 in)	30 August 2003
Sep	200.7 mm (7.9 in)	18 September 1986
Oct	92.2 mm (3.6 in)	9 October 2009
Nov	114.3 mm (4.5 in)	14 November 1993
Dec	81.3 mm (3.2 in)	3 December 1982

Period of Record Coverage

1905 to 1910

6 years of record at Chester, 1905 to 1910. 4 years have data for under 90 percent of days and are left out of rankings: 1905, 1906, 1909, 1910.

Latest Records

Latest records at Chester
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
13 August 2026	Chester, US	daily rain	46.5 mm (1.8 in)	11.7 mm (0.5 in)	76 years	40 of 100 (Notable)
11 July 2026	Chester, US	daily rain	41.9 mm (1.6 in)	23.6 mm (0.9 in)	55 years	40 of 100 (Notable)
26 June 2026	Chester, US	daily rain	66.3 mm (2.6 in)	20.1 mm (0.8 in)	32 years	33 of 100 (Routine)
7 March 2026	Chester, US	daily rain	42.9 mm (1.7 in)	5.8 mm (0.23 in)	31 years	23 of 100 (Routine)
5 March 2026	Chester, US	daily rain	61.2 mm (2.4 in)	22.6 mm (0.9 in)	15 years	32 of 100 (Routine)
30 January 2026	Chester, US	daily snow depth (Tie)	22.9 cm (9.0 in)	tie	47 years	6 of 100 (Routine)
29 January 2026	Chester, US	daily snow depth (Tie)	25.4 cm (10.0 in)	tie	47 years	6 of 100 (Routine)
28 January 2026	Chester, US	daily snow depth (Tie)	25.4 cm (10.0 in)	tie	47 years	6 of 100 (Routine)
27 January 2026	Chester, US	daily snow depth	27.9 cm (11.0 in)	7.6 cm (3.0 in)	48 years	35 of 100 (Notable)
26 January 2026	Chester, US	daily snow depth	30.5 cm (12.0 in)	5.1 cm (2.0 in)	48 years	31 of 100 (Routine)
25 January 2026	Chester, US	monthly snowfall	25.4 cm (10.0 in)	7.6 cm (3.0 in)	117 years	68 of 100 (Major)
25 January 2026	Chester, US	daily snow depth (Tie)	25.4 cm (10.0 in)	tie	48 years	6 of 100 (Routine)
2 December 2025	Chester, US	daily snow depth (Tie)	2.5 cm (1.0 in)	tie	72 years	7 of 100 (Routine)
19 October 2025	Chester, US	daily rain	52.1 mm (2.1 in)	21.9 mm (0.9 in)	4 years	28 of 100 (Routine)
6 April 2025	Chester, US	daily rain	37.6 mm (1.5 in)	4.6 mm (0.18 in)	60 years	31 of 100 (Routine)
5 April 2025	Chester, US	daily rain	88.9 mm (3.5 in)	62.5 mm (2.5 in)	28 years	58 of 100 (Notable)
21 February 2025	Chester, US	daily snow depth	10.2 cm (4.0 in)	2.6 cm (1.0 in)	59 years	30 of 100 (Routine)
20 February 2025	Chester, US	daily snow depth	10.2 cm (4.0 in)	2.6 cm (1.0 in)	10 years	16 of 100 (Routine)
19 February 2025	Chester, US	daily snowfall	10.9 cm (4.3 in)	9.6 cm (3.8 in)	48 years	42 of 100 (Notable)
19 February 2025	Chester, US	daily snow depth	12.7 cm (5.0 in)	2.5 cm (1.0 in)	10 years	15 of 100 (Routine)

Extremes by Year

1905 to 2026

Yearly extremes at Chester: 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)	1905	38.3 C (101.0 F)	6
Coldest night (TNn)	-17.8 C (0.0 F)	1909	-13.8 C (7.1 F)	6
Wettest day (Rx1day)	200.7 mm (7.9 in)	1986	68.6 mm (2.7 in)	85
Wettest five days (Rx5day)	241.1 mm (9.5 in)	2017	109.9 mm (4.3 in)	85
Longest dry spell (CDD)	38 days	1968	19 days	85

Hottest day (TXx)

The hottest day of the year at Chester, 1905 to 2026. The record is 40.0 C (104.0 F) in 1905, marked on the chart; the median year is 38.3 C (101.0 F).

Hottest day (TXx) at Chester by year
Year	Hottest day (TXx)
1905	40.0 C (104.0 F)
1906	36.7 C (98.1 F)
1907	38.9 C (102.0 F)
1908	37.8 C (100.0 F)
1909	39.4 C (102.9 F)
1910	33.9 C (93.0 F)
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
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
2001	n/a
2002	n/a
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 Chester, 1905 to 2026. The record is -17.8 C (0.0 F) in 1909, marked on the chart; the median year is -13.8 C (7.1 F).

Coldest night (TNn) at Chester by year
Year	Coldest night (TNn)
1905	-7.8 C (18.0 F)
1906	-14.4 C (6.1 F)
1907	-15.6 C (3.9 F)
1908	-13.3 C (8.1 F)
1909	-17.8 C (0.0 F)
1910	-12.2 C (10.0 F)
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
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
2001	n/a
2002	n/a
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 Chester, 1905 to 2026. The record is 200.7 mm (7.9 in) in 1986, marked on the chart; the median year is 68.6 mm (2.7 in).

Wettest day (Rx1day) at Chester by year
Year	Wettest day (Rx1day)
1905	163.6 mm (6.4 in)
1906	38.6 mm (1.5 in)
1907	53.8 mm (2.1 in)
1908	61.0 mm (2.4 in)
1909	81.3 mm (3.2 in)
1910	75.2 mm (3.0 in)
1948	34.3 mm (1.4 in)
1949	152.4 mm (6.0 in)
1950	61.0 mm (2.4 in)
1951	51.1 mm (2.0 in)
1952	47.5 mm (1.9 in)
1953	43.9 mm (1.7 in)
1954	78.7 mm (3.1 in)
1955	57.4 mm (2.3 in)
1956	48.3 mm (1.9 in)
1957	66.0 mm (2.6 in)
1958	83.8 mm (3.3 in)
1959	88.9 mm (3.5 in)
1960	40.6 mm (1.6 in)
1961	68.6 mm (2.7 in)
1962	55.9 mm (2.2 in)
1963	63.5 mm (2.5 in)
1964	71.1 mm (2.8 in)
1965	63.5 mm (2.5 in)
1966	55.9 mm (2.2 in)
1967	43.2 mm (1.7 in)
1968	52.1 mm (2.1 in)
1969	58.4 mm (2.3 in)
1970	61.0 mm (2.4 in)
1971	43.9 mm (1.7 in)
1972	78.7 mm (3.1 in)
1973	83.8 mm (3.3 in)
1974	81.3 mm (3.2 in)
1975	53.3 mm (2.1 in)
1976	51.6 mm (2.0 in)
1977	106.7 mm (4.2 in)
1978	64.8 mm (2.6 in)
1979	81.3 mm (3.2 in)
1980	63.5 mm (2.5 in)
1981	76.2 mm (3.0 in)
1982	91.4 mm (3.6 in)
1983	83.8 mm (3.3 in)
1984	94.0 mm (3.7 in)
1985	101.6 mm (4.0 in)
1986	200.7 mm (7.9 in)
1987	63.5 mm (2.5 in)
1988	53.3 mm (2.1 in)
1989	66.0 mm (2.6 in)
1990	83.8 mm (3.3 in)
1991	86.4 mm (3.4 in)
1992	78.7 mm (3.1 in)
1993	114.3 mm (4.5 in)
1994	60.2 mm (2.4 in)
1995	106.7 mm (4.2 in)
1996	86.4 mm (3.4 in)
1997	76.2 mm (3.0 in)
1998	50.8 mm (2.0 in)
1999	73.7 mm (2.9 in)
2000	114.3 mm (4.5 in)
2001	57.2 mm (2.3 in)
2002	94.0 mm (3.7 in)
2003	127.0 mm (5.0 in)
2004	44.5 mm (1.8 in)
2005	81.3 mm (3.2 in)
2006	61.5 mm (2.4 in)
2007	170.7 mm (6.7 in)
2008	113.8 mm (4.5 in)
2009	92.2 mm (3.6 in)
2010	60.2 mm (2.4 in)
2011	78.5 mm (3.1 in)
2012	44.7 mm (1.8 in)
2013	74.4 mm (2.9 in)
2014	67.6 mm (2.7 in)
2015	87.6 mm (3.4 in)
2016	96.3 mm (3.8 in)
2017	89.7 mm (3.5 in)
2018	98.0 mm (3.9 in)
2019	55.4 mm (2.2 in)
2020	52.1 mm (2.1 in)
2021	85.6 mm (3.4 in)
2022	60.2 mm (2.4 in)
2023	68.6 mm (2.7 in)
2024	62.7 mm (2.5 in)
2025	88.9 mm (3.5 in)
2026	66.3 mm (2.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Chester, 1905 to 2026. The record is 241.1 mm (9.5 in) in 2017, marked on the chart; the median year is 109.9 mm (4.3 in).

Wettest five days (Rx5day) at Chester by year
Year	Wettest five days (Rx5day)
1905	210.3 mm (8.3 in)
1906	129.6 mm (5.1 in)
1907	77.3 mm (3.0 in)
1908	110.8 mm (4.4 in)
1909	105.7 mm (4.2 in)
1910	135.9 mm (5.4 in)
1948	69.4 mm (2.7 in)
1949	168.1 mm (6.6 in)
1950	120.7 mm (4.8 in)
1951	107.2 mm (4.2 in)
1952	68.1 mm (2.7 in)
1953	59.7 mm (2.4 in)
1954	86.3 mm (3.4 in)
1955	102.5 mm (4.0 in)
1956	71.2 mm (2.8 in)
1957	118.9 mm (4.7 in)
1958	202.7 mm (8.0 in)
1959	132.1 mm (5.2 in)
1960	57.0 mm (2.2 in)
1961	132.9 mm (5.2 in)
1962	90.1 mm (3.5 in)
1963	80.0 mm (3.1 in)
1964	151.6 mm (6.0 in)
1965	105.1 mm (4.1 in)
1966	81.3 mm (3.2 in)
1967	64.3 mm (2.5 in)
1968	100.3 mm (3.9 in)
1969	140.3 mm (5.5 in)
1970	125.9 mm (5.0 in)
1971	77.2 mm (3.0 in)
1972	102.4 mm (4.0 in)
1973	123.9 mm (4.9 in)
1974	91.0 mm (3.6 in)
1975	87.8 mm (3.5 in)
1976	87.9 mm (3.5 in)
1977	119.1 mm (4.7 in)
1978	78.1 mm (3.1 in)
1979	143.8 mm (5.7 in)
1980	99.0 mm (3.9 in)
1981	125.5 mm (4.9 in)
1982	161.6 mm (6.4 in)
1983	202.8 mm (8.0 in)
1984	114.1 mm (4.5 in)
1985	140.7 mm (5.5 in)
1986	220.3 mm (8.7 in)
1987	86.8 mm (3.4 in)
1988	58.0 mm (2.3 in)
1989	103.6 mm (4.1 in)
1990	134.4 mm (5.3 in)
1991	161.1 mm (6.3 in)
1992	111.2 mm (4.4 in)
1993	195.3 mm (7.7 in)
1994	105.4 mm (4.1 in)
1995	150.1 mm (5.9 in)
1996	128.3 mm (5.1 in)
1997	79.8 mm (3.1 in)
1998	68.3 mm (2.7 in)
1999	102.5 mm (4.0 in)
2000	150.4 mm (5.9 in)
2001	111.6 mm (4.4 in)
2002	129.3 mm (5.1 in)
2003	156.7 mm (6.2 in)
2004	73.2 mm (2.9 in)
2005	89.3 mm (3.5 in)
2006	97.0 mm (3.8 in)
2007	171.2 mm (6.7 in)
2008	161.1 mm (6.3 in)
2009	118.9 mm (4.7 in)
2010	72.7 mm (2.9 in)
2011	219.4 mm (8.6 in)
2012	80.3 mm (3.2 in)
2013	91.7 mm (3.6 in)
2014	85.3 mm (3.4 in)
2015	165.8 mm (6.5 in)
2016	158.3 mm (6.2 in)
2017	241.1 mm (9.5 in)
2018	157.5 mm (6.2 in)
2019	85.3 mm (3.4 in)
2020	87.2 mm (3.4 in)
2021	103.2 mm (4.1 in)
2022	69.3 mm (2.7 in)
2023	110.0 mm (4.3 in)
2024	90.9 mm (3.6 in)
2025	164.3 mm (6.5 in)
2026	109.9 mm (4.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Chester, 1905 to 2026. The record is 38 days in 1968, marked on the chart; the median year is 19 days.

Longest dry spell (CDD) at Chester by year
Year	Longest dry spell (CDD)
1905	17 days
1906	20 days
1907	16 days
1908	25 days
1909	25 days
1910	32 days
1948	19 days
1949	14 days
1950	24 days
1951	17 days
1952	24 days
1953	30 days
1954	19 days
1955	29 days
1956	18 days
1957	23 days
1958	26 days
1959	16 days
1960	14 days
1961	16 days
1962	19 days
1963	29 days
1964	30 days
1965	19 days
1966	13 days
1967	29 days
1968	38 days
1969	19 days
1970	16 days
1971	14 days
1972	12 days
1973	14 days
1974	21 days
1975	15 days
1976	25 days
1977	18 days
1978	14 days
1979	18 days
1980	22 days
1981	20 days
1982	14 days
1983	27 days
1984	14 days
1985	19 days
1986	27 days
1987	16 days
1988	19 days
1989	22 days
1990	21 days
1991	24 days
1992	28 days
1993	20 days
1994	16 days
1995	25 days
1996	19 days
1997	15 days
1998	26 days
1999	30 days
2000	17 days
2001	15 days
2002	27 days
2003	19 days
2004	31 days
2005	23 days
2006	13 days
2007	17 days
2008	18 days
2009	16 days
2010	19 days
2011	20 days
2012	22 days
2013	28 days
2014	20 days
2015	26 days
2016	19 days
2017	29 days
2018	13 days
2019	13 days
2020	24 days
2021	14 days
2022	20 days
2023	20 days
2024	32 days
2025	24 days
2026	14 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.

Rainfall Return Levels

78 years, 1907 to 2025

A day with at least 69.5 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 167.0 mm (6.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Chester: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	69.5 mm (2.7 in)
5 years	91.5 mm (3.6 in)
10 years	107.5 mm (4.2 in)
25 years	129.7 mm (5.1 in)
50 years	147.7 mm (5.8 in)
100 years	167.0 mm (6.6 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 1907 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: 200.7 mm (7.9 in) in 1986; 170.7 mm (6.7 in) in 2007; 127.0 mm (5.0 in) in 2003.

Download the Data

Data for Chester standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chester 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 2026-10-14 (14 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).

Year	Days with data	Share of year	Complete
1905	297	81%	No
1906	300	82%	No
1907	359	98%	Yes
1908	359	98%	Yes
1909	303	83%	No
1910	182	50%	No