Charleroi Lock 4 Weather Records (USC00361377)

Record envelope, standing records and threshold days for Charleroi Lock 4 (USC00361377), Pennsylvania, United States, with 96 years of record.

Key Facts for Charleroi Lock 4

Charleroi Lock 4 (USC00361377) is a weather station in Pennsylvania, United States at 40.15 latitude and -79.90 longitude, 228 m (749 ft) above sea level.
The station reports from 1931 to 2026, 96 years of record.
1,464 records set at Charleroi Lock 4 still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Charleroi Lock 4 set a daily record precipitation of 22.9 mm (0.9 in) on 12 October 2026 (provisional).

Provisional Records

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

About the Station

Location: Pennsylvania, United States, 40.15 latitude, -79.90 longitude.
Elevation: 228 m (749 ft).
Period of record: 1931 to 2026, 96 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

49 days at or beyond a record

The band shows the record high and record low for each calendar day at Charleroi Lock 4. The lines show the 2026 daily maximum and minimum. 49 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Charleroi Lock 4, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	21.7 C (71.1 F)	-22.2 C (-8.0 F)	15.0 C (59.0 F)	-22.2 C (-8.0 F)
Feb	26.7 C (80.1 F)	-22.2 C (-8.0 F)	20.0 C (68.0 F)	-22.2 C (-8.0 F)
Mar	27.8 C (82.0 F)	-18.3 C (-0.9 F)	27.8 C (82.0 F)	-6.7 C (19.9 F)
Apr	31.7 C (89.1 F)	-6.1 C (21.0 F)	30.6 C (87.1 F)	-2.2 C (28.0 F)
May	33.3 C (91.9 F)	-1.1 C (30.0 F)	32.2 C (90.0 F)	2.8 C (37.0 F)
Jun	36.1 C (97.0 F)	5.6 C (42.1 F)	33.3 C (91.9 F)	8.3 C (46.9 F)
Jul	37.2 C (99.0 F)	10.0 C (50.0 F)	36.7 C (98.1 F)	12.8 C (55.0 F)
Aug	35.6 C (96.1 F)	9.4 C (48.9 F)	32.8 C (91.0 F)	14.4 C (57.9 F)
Sep	35.0 C (95.0 F)	3.3 C (37.9 F)	35.6 C (96.1 F)	7.2 C (45.0 F)
Oct	33.3 C (91.9 F)	-0.6 C (30.9 F)	30.6 C (87.1 F)	6.1 C (43.0 F)
Nov	28.9 C (84.0 F)	-8.9 C (16.0 F)	n/a	n/a
Dec	21.1 C (70.0 F)	-18.3 C (-0.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Charleroi Lock 4 still stand. 2015 holds the most, with 119.

All-Time Record Progression

2 new records

2 all-time records were set at Charleroi Lock 4 between 21 July 1988 and 10 September 2018. Each dot is a new record.

When Charleroi Lock 4 set new all-time records
Date	Kind	Detail
1988-07-21	Record daily precipitation	Record daily precipitation 103.6 mm (4.1 in)
2018-09-10	Record daily precipitation	Record daily precipitation 111.3 mm (4.4 in)

Wettest Day of Each Month

Sep: 111.3 mm (4.4 in)

The wettest day on record for each calendar month at Charleroi Lock 4. The most was 111.3 mm (4.4 in) on 10 September 2018.

Record daily precipitation for each month at Charleroi Lock 4
Month	Record daily precipitation (mm)	Date
Jan	45.2 mm (1.8 in)	27 January 1952
Feb	62.2 mm (2.4 in)	16 February 2018
Mar	54.6 mm (2.1 in)	5 March 1963
Apr	64.5 mm (2.5 in)	3 April 2024
May	78.7 mm (3.1 in)	17 May 2015
Jun	81.3 mm (3.2 in)	23 June 1972
Jul	103.6 mm (4.1 in)	21 July 1988
Aug	93.2 mm (3.7 in)	7 August 2000
Sep	111.3 mm (4.4 in)	10 September 2018
Oct	91.7 mm (3.6 in)	16 October 1954
Nov	53.3 mm (2.1 in)	4 November 1985
Dec	69.6 mm (2.7 in)	3 December 1991

Period of Record Coverage

2011 to 2026

16 years of record at Charleroi Lock 4, 2011 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 2012, 2018, 2026.

Days with data per year at Charleroi Lock 4
Year	Days with data	Share of year	Complete
2011	360	99%	Yes
2012	307	84%	No
2013	345	95%	Yes
2014	351	96%	Yes
2015	349	96%	Yes
2016	353	96%	Yes
2017	357	98%	Yes
2018	324	89%	No
2019	354	97%	Yes
2020	356	97%	Yes
2021	343	94%	Yes
2022	357	98%	Yes
2023	351	96%	Yes
2024	345	94%	Yes
2025	345	95%	Yes
2026	255	70%	No

Latest Records

Latest records at Charleroi Lock 4
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 October 2026	Charleroi Lock 4, US	daily rain (Provisional)	22.9 mm (0.9 in)	2.3 mm (0.09 in)	80 years	20 of 100 (Routine)
11 October 2026	Charleroi Lock 4, US	daily rain (Provisional)	40.6 mm (1.6 in)	25.4 mm (1.0 in)	36 years	50 of 100 (Notable)
5 July 2026	Charleroi Lock 4, US	daily rain	46.2 mm (1.8 in)	2.5 mm (0.10 in)	60 years	29 of 100 (Routine)
23 May 2026	Charleroi Lock 4, US	daily rain	27.9 mm (1.1 in)	3.0 mm (0.12 in)	51 years	27 of 100 (Routine)
27 March 2026	Charleroi Lock 4, US	daily rain	53.6 mm (2.1 in)	16.3 mm (0.6 in)	24 years	36 of 100 (Notable)
23 March 2026	Charleroi Lock 4, US	daily rain	28.2 mm (1.1 in)	10.4 mm (0.4 in)	76 years	44 of 100 (Notable)
17 March 2026	Charleroi Lock 4, US	daily snowfall	3.8 cm (1.5 in)	0.2 cm (0.1 in)	48 years	20 of 100 (Routine)
31 December 2025	Charleroi Lock 4, US	daily snowfall	6.4 cm (2.5 in)	2.3 cm (0.9 in)	36 years	24 of 100 (Routine)
14 December 2025	Charleroi Lock 4, US	daily snowfall (Tie)	7.6 cm (3.0 in)	tie	8 years	2 of 100 (Routine)
17 July 2025	Charleroi Lock 4, US	daily rain	40.4 mm (1.6 in)	23.9 mm (0.9 in)	72 years	51 of 100 (Notable)
4 April 2025	Charleroi Lock 4, US	daily rain	44.7 mm (1.8 in)	5.3 mm (0.21 in)	94 years	43 of 100 (Notable)
6 January 2025	Charleroi Lock 4, US	daily snowfall	7.6 cm (3.0 in)	2.5 cm (1.0 in)	78 years	37 of 100 (Notable)
11 November 2024	Charleroi Lock 4, US	daily rain	33.0 mm (1.3 in)	14.7 mm (0.6 in)	33 years	36 of 100 (Notable)
18 July 2024	Charleroi Lock 4, US	daily rain	25.4 mm (1.0 in)	4.1 mm (0.16 in)	40 years	24 of 100 (Routine)
12 April 2024	Charleroi Lock 4, US	daily rain	46.5 mm (1.8 in)	7.1 mm (0.28 in)	43 years	30 of 100 (Routine)
3 April 2024	Charleroi Lock 4, US	monthly rain	64.5 mm (2.5 in)	10.7 mm (0.4 in)	5 years	33 of 100 (Routine)
29 February 2024	Charleroi Lock 4, US	daily rain	12.4 mm (0.5 in)	0.7 mm (0.03 in)	40 years	20 of 100 (Routine)
10 January 2024	Charleroi Lock 4, US	daily rain	18.3 mm (0.7 in)	4.3 mm (0.17 in)	8 years	17 of 100 (Routine)
22 November 2023	Charleroi Lock 4, US	daily rain	20.8 mm (0.8 in)	1.7 mm (0.07 in)	70 years	20 of 100 (Routine)
15 August 2023	Charleroi Lock 4, US	daily rain	52.1 mm (2.1 in)	29.2 mm (1.1 in)	45 years	47 of 100 (Notable)

Climate Trend

13 complete years, 2011 to 2025

One stripe for each of 13 complete years at Charleroi Lock 4, 2011 to 2025. Blue stripes are years cooler than the station's own mean of 12.2 C (54.0 F); red stripes are warmer. The coolest year was 2014, at 10.6 C (51.1 F), and the warmest was 2024, at 13.4 C (56.1 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Charleroi Lock 4 as warming stripes, 2011 to 2025
Year	Annual mean temperature	Difference from the station mean
2011	11.8 C	-0.39 C
2013	11.0 C	-1.17 C
2014	10.6 C	-1.60 C
2015	12.1 C	-0.13 C
2016	12.4 C	+0.17 C
2017	12.7 C	+0.48 C
2019	12.4 C	+0.22 C
2020	12.6 C	+0.42 C
2021	12.9 C	+0.67 C
2022	11.9 C	-0.34 C
2023	12.8 C	+0.60 C
2024	13.4 C	+1.18 C
2025	12.1 C	-0.09 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

1931 to 2026

Yearly extremes at Charleroi Lock 4: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.2 C (99.0 F)	2012	35.3 C (95.5 F)	16
Coldest night (TNn)	-22.2 C (-8.0 F)	2015	-16.7 C (1.9 F)	16
Wettest day (Rx1day)	111.3 mm (4.4 in)	2018	48.1 mm (1.9 in)	96
Wettest five days (Rx5day)	243.3 mm (9.6 in)	2018	79.7 mm (3.1 in)	96
Longest dry spell (CDD)	31 days	1988	15 days	96

Hottest day (TXx)

The hottest day of the year at Charleroi Lock 4, 1931 to 2026. The record is 37.2 C (99.0 F) in 2012, marked on the chart; the median year is 35.3 C (95.5 F).

Hottest day (TXx) at Charleroi Lock 4 by year
Year	Hottest day (TXx)
1931	n/a
1932	n/a
1933	n/a
1934	n/a
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
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	35.0 C (95.0 F)
2012	37.2 C (99.0 F)
2013	32.8 C (91.0 F)
2014	33.9 C (93.0 F)
2015	33.9 C (93.0 F)
2016	33.9 C (93.0 F)
2017	35.6 C (96.1 F)
2018	35.0 C (95.0 F)
2019	35.0 C (95.0 F)
2020	36.1 C (97.0 F)
2021	35.6 C (96.1 F)
2022	36.1 C (97.0 F)
2023	35.0 C (95.0 F)
2024	36.1 C (97.0 F)
2025	35.6 C (96.1 F)
2026	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Charleroi Lock 4, 1931 to 2026. The record is -22.2 C (-8.0 F) in 2015, marked on the chart; the median year is -16.7 C (1.9 F).

Coldest night (TNn) at Charleroi Lock 4 by year
Year	Coldest night (TNn)
1931	n/a
1932	n/a
1933	n/a
1934	n/a
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
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	-17.8 C (0.0 F)
2012	-11.7 C (10.9 F)
2013	-13.9 C (7.0 F)
2014	-21.7 C (-7.1 F)
2015	-22.2 C (-8.0 F)
2016	-15.6 C (3.9 F)
2017	-15.6 C (3.9 F)
2018	-20.0 C (-4.0 F)
2019	-18.3 C (-0.9 F)
2020	-10.6 C (12.9 F)
2021	-14.4 C (6.1 F)
2022	-18.3 C (-0.9 F)
2023	-12.8 C (9.0 F)
2024	-13.9 C (7.0 F)
2025	-21.1 C (-6.0 F)
2026	-22.2 C (-8.0 F)

Wettest day (Rx1day)

The wettest day of the year at Charleroi Lock 4, 1931 to 2026. The record is 111.3 mm (4.4 in) in 2018, marked on the chart; the median year is 48.1 mm (1.9 in).

Wettest day (Rx1day) at Charleroi Lock 4 by year
Year	Wettest day (Rx1day)
1931	43.2 mm (1.7 in)
1932	40.6 mm (1.6 in)
1933	39.4 mm (1.6 in)
1934	51.8 mm (2.0 in)
1935	73.2 mm (2.9 in)
1936	57.2 mm (2.3 in)
1937	53.6 mm (2.1 in)
1938	47.0 mm (1.9 in)
1939	42.2 mm (1.7 in)
1940	49.3 mm (1.9 in)
1941	60.2 mm (2.4 in)
1942	63.0 mm (2.5 in)
1943	34.5 mm (1.4 in)
1944	53.3 mm (2.1 in)
1945	52.3 mm (2.1 in)
1946	40.4 mm (1.6 in)
1947	52.1 mm (2.1 in)
1948	52.6 mm (2.1 in)
1949	54.4 mm (2.1 in)
1950	58.4 mm (2.3 in)
1951	42.7 mm (1.7 in)
1952	45.2 mm (1.8 in)
1953	56.6 mm (2.2 in)
1954	91.7 mm (3.6 in)
1955	43.9 mm (1.7 in)
1956	59.7 mm (2.4 in)
1957	46.2 mm (1.8 in)
1958	39.6 mm (1.6 in)
1959	39.4 mm (1.6 in)
1960	39.1 mm (1.5 in)
1961	47.2 mm (1.9 in)
1962	41.4 mm (1.6 in)
1963	54.6 mm (2.1 in)
1964	49.5 mm (1.9 in)
1965	38.6 mm (1.5 in)
1966	43.7 mm (1.7 in)
1967	45.0 mm (1.8 in)
1968	41.4 mm (1.6 in)
1969	87.1 mm (3.4 in)
1970	37.6 mm (1.5 in)
1971	56.9 mm (2.2 in)
1972	81.3 mm (3.2 in)
1973	39.4 mm (1.6 in)
1974	34.3 mm (1.4 in)
1975	50.8 mm (2.0 in)
1976	43.9 mm (1.7 in)
1977	49.0 mm (1.9 in)
1978	39.4 mm (1.6 in)
1979	44.2 mm (1.7 in)
1980	60.2 mm (2.4 in)
1981	39.4 mm (1.6 in)
1982	43.2 mm (1.7 in)
1983	33.8 mm (1.3 in)
1984	39.4 mm (1.6 in)
1985	53.3 mm (2.1 in)
1986	50.8 mm (2.0 in)
1987	38.4 mm (1.5 in)
1988	103.6 mm (4.1 in)
1989	38.9 mm (1.5 in)
1990	45.2 mm (1.8 in)
1991	69.6 mm (2.7 in)
1992	50.0 mm (2.0 in)
1993	55.1 mm (2.2 in)
1994	52.1 mm (2.1 in)
1995	41.1 mm (1.6 in)
1996	41.9 mm (1.6 in)
1997	51.3 mm (2.0 in)
1998	31.2 mm (1.2 in)
1999	67.3 mm (2.6 in)
2000	93.2 mm (3.7 in)
2001	26.9 mm (1.1 in)
2002	50.3 mm (2.0 in)
2003	51.3 mm (2.0 in)
2004	82.0 mm (3.2 in)
2005	44.7 mm (1.8 in)
2006	34.3 mm (1.4 in)
2007	72.4 mm (2.9 in)
2008	40.1 mm (1.6 in)
2009	37.3 mm (1.5 in)
2010	54.4 mm (2.1 in)
2011	57.9 mm (2.3 in)
2012	63.0 mm (2.5 in)
2013	46.2 mm (1.8 in)
2014	35.1 mm (1.4 in)
2015	78.7 mm (3.1 in)
2016	42.7 mm (1.7 in)
2017	57.2 mm (2.3 in)
2018	111.3 mm (4.4 in)
2019	41.7 mm (1.6 in)
2020	41.4 mm (1.6 in)
2021	63.0 mm (2.5 in)
2022	40.9 mm (1.6 in)
2023	52.1 mm (2.1 in)
2024	64.5 mm (2.5 in)
2025	44.7 mm (1.8 in)
2026	53.6 mm (2.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Charleroi Lock 4, 1931 to 2026. The record is 243.3 mm (9.6 in) in 2018, marked on the chart; the median year is 79.7 mm (3.1 in).

Wettest five days (Rx5day) at Charleroi Lock 4 by year
Year	Wettest five days (Rx5day)
1931	68.2 mm (2.7 in)
1932	66.5 mm (2.6 in)
1933	81.3 mm (3.2 in)
1934	74.7 mm (2.9 in)
1935	125.3 mm (4.9 in)
1936	109.5 mm (4.3 in)
1937	101.8 mm (4.0 in)
1938	61.8 mm (2.4 in)
1939	62.8 mm (2.5 in)
1940	68.6 mm (2.7 in)
1941	107.7 mm (4.2 in)
1942	78.3 mm (3.1 in)
1943	61.6 mm (2.4 in)
1944	63.4 mm (2.5 in)
1945	90.1 mm (3.5 in)
1946	51.4 mm (2.0 in)
1947	78.3 mm (3.1 in)
1948	97.8 mm (3.9 in)
1949	57.3 mm (2.3 in)
1950	74.2 mm (2.9 in)
1951	87.6 mm (3.4 in)
1952	73.9 mm (2.9 in)
1953	69.5 mm (2.7 in)
1954	96.5 mm (3.8 in)
1955	95.1 mm (3.7 in)
1956	112.5 mm (4.4 in)
1957	64.8 mm (2.6 in)
1958	68.3 mm (2.7 in)
1959	61.0 mm (2.4 in)
1960	72.4 mm (2.9 in)
1961	77.7 mm (3.1 in)
1962	80.0 mm (3.1 in)
1963	82.6 mm (3.3 in)
1964	75.2 mm (3.0 in)
1965	51.3 mm (2.0 in)
1966	62.6 mm (2.5 in)
1967	97.8 mm (3.9 in)
1968	95.1 mm (3.7 in)
1969	101.1 mm (4.0 in)
1970	52.3 mm (2.1 in)
1971	84.4 mm (3.3 in)
1972	137.4 mm (5.4 in)
1973	85.6 mm (3.4 in)
1974	99.6 mm (3.9 in)
1975	104.1 mm (4.1 in)
1976	54.1 mm (2.1 in)
1977	66.1 mm (2.6 in)
1978	66.2 mm (2.6 in)
1979	80.0 mm (3.1 in)
1980	86.4 mm (3.4 in)
1981	115.1 mm (4.5 in)
1982	58.5 mm (2.3 in)
1983	74.7 mm (2.9 in)
1984	47.0 mm (1.9 in)
1985	111.3 mm (4.4 in)
1986	109.2 mm (4.3 in)
1987	56.2 mm (2.2 in)
1988	124.0 mm (4.9 in)
1989	83.5 mm (3.3 in)
1990	90.4 mm (3.6 in)
1991	80.1 mm (3.2 in)
1992	80.5 mm (3.2 in)
1993	60.2 mm (2.4 in)
1994	104.3 mm (4.1 in)
1995	51.8 mm (2.0 in)
1996	70.4 mm (2.8 in)
1997	95.5 mm (3.8 in)
1998	75.4 mm (3.0 in)
1999	80.8 mm (3.2 in)
2000	142.0 mm (5.6 in)
2001	44.8 mm (1.8 in)
2002	61.8 mm (2.4 in)
2003	78.2 mm (3.1 in)
2004	94.1 mm (3.7 in)
2005	103.1 mm (4.1 in)
2006	68.5 mm (2.7 in)
2007	92.0 mm (3.6 in)
2008	63.3 mm (2.5 in)
2009	66.3 mm (2.6 in)
2010	63.8 mm (2.5 in)
2011	88.4 mm (3.5 in)
2012	101.1 mm (4.0 in)
2013	86.6 mm (3.4 in)
2014	60.2 mm (2.4 in)
2015	91.7 mm (3.6 in)
2016	63.2 mm (2.5 in)
2017	63.2 mm (2.5 in)
2018	243.3 mm (9.6 in)
2019	99.0 mm (3.9 in)
2020	79.3 mm (3.1 in)
2021	89.9 mm (3.5 in)
2022	73.9 mm (2.9 in)
2023	63.6 mm (2.5 in)
2024	114.5 mm (4.5 in)
2025	81.2 mm (3.2 in)
2026	81.8 mm (3.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Charleroi Lock 4, 1931 to 2026. The record is 31 days in 1988, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Charleroi Lock 4 by year
Year	Longest dry spell (CDD)
1931	11 days
1932	14 days
1933	13 days
1934	19 days
1935	12 days
1936	18 days
1937	14 days
1938	20 days
1939	13 days
1940	14 days
1941	19 days
1942	17 days
1943	26 days
1944	18 days
1945	16 days
1946	17 days
1947	18 days
1948	28 days
1949	10 days
1950	12 days
1951	28 days
1952	12 days
1953	25 days
1954	12 days
1955	23 days
1956	13 days
1957	14 days
1958	12 days
1959	16 days
1960	13 days
1961	10 days
1962	18 days
1963	28 days
1964	26 days
1965	13 days
1966	15 days
1967	19 days
1968	13 days
1969	22 days
1970	14 days
1971	17 days
1972	16 days
1973	15 days
1974	12 days
1975	11 days
1976	25 days
1977	19 days
1978	12 days
1979	10 days
1980	15 days
1981	17 days
1982	18 days
1983	13 days
1984	11 days
1985	24 days
1986	14 days
1987	22 days
1988	31 days
1989	9 days
1990	14 days
1991	19 days
1992	16 days
1993	13 days
1994	18 days
1995	27 days
1996	10 days
1997	22 days
1998	12 days
1999	16 days
2000	14 days
2001	13 days
2002	11 days
2003	14 days
2004	14 days
2005	25 days
2006	17 days
2007	16 days
2008	16 days
2009	14 days
2010	18 days
2011	12 days
2012	14 days
2013	14 days
2014	12 days
2015	13 days
2016	11 days
2017	19 days
2018	18 days
2019	12 days
2020	14 days
2021	16 days
2022	13 days
2023	22 days
2024	24 days
2025	14 days
2026	18 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

86 years, 1931 to 2025

A day with at least 47.5 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 115.4 mm (4.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Charleroi Lock 4: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	47.5 mm (1.9 in)
5 years	60.3 mm (2.4 in)
10 years	70.6 mm (2.8 in)
25 years	86.1 mm (3.4 in)
50 years	99.8 mm (3.9 in)
100 years	115.4 mm (4.5 in)	Longer than the 86 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, 86 years of values from 1931 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: 111.3 mm (4.4 in) in 2018; 103.6 mm (4.1 in) in 1988; 93.2 mm (3.7 in) in 2000.

Download the Data

Data for Charleroi Lock 4 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Charleroi Lock 4 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).