Harpers Ferry River Weather Records (USC00463927)

Record envelope, standing records and threshold days for Harpers Ferry River (USC00463927), West Virginia, United States, with 84 years of record.

Key Facts for Harpers Ferry River

Harpers Ferry River (USC00463927) is a weather station in West Virginia, United States at 39.32 latitude and -77.73 longitude, 75 m (246 ft) above sea level.
The station reports from 1889 to 1972, 84 years of record.
0 records set at Harpers Ferry River still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Harpers Ferry River set a monthly record daily precipitation of 134.6 mm (5.3 in) on 22 June 1972.

About the Station

Location: West Virginia, United States, 39.32 latitude, -77.73 longitude.
Elevation: 75 m (246 ft).
Period of record: 1889 to 1972, 84 years.
Eligible elements: prcp.

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 Harpers Ferry River. 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 Harpers Ferry River, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at Harpers Ferry River still stand.

All-Time Record Progression

2 new records

2 all-time records were set at Harpers Ferry River between 4 October 1927 and 21 July 1956. Each dot is a new record.

When Harpers Ferry River set new all-time records
Date	Kind	Detail
1927-10-04	Record daily precipitation	Record daily precipitation 121.9 mm (4.8 in)
1956-07-21	Record daily precipitation	Record daily precipitation 141.7 mm (5.6 in)

Wettest Day of Each Month

Jul: 141.7 mm (5.6 in)

The wettest day on record for each calendar month at Harpers Ferry River. The most was 141.7 mm (5.6 in) on 21 July 1956.

Record daily precipitation for each month at Harpers Ferry River
Month	Record daily precipitation (mm)	Date
Jan	49.3 mm (1.9 in)	24 January 1896
Feb	50.8 mm (2.0 in)	6 February 1896
Mar	62.0 mm (2.4 in)	5 March 1965
Apr	92.7 mm (3.6 in)	26 April 1937
May	101.6 mm (4.0 in)	23 May 1901
Jun	134.6 mm (5.3 in)	22 June 1972
Jul	141.7 mm (5.6 in)	21 July 1956
Aug	108.0 mm (4.3 in)	13 August 1955
Sep	116.8 mm (4.6 in)	25 September 1912
Oct	121.9 mm (4.8 in)	4 October 1927
Nov	88.9 mm (3.5 in)	24 November 1901
Dec	66.0 mm (2.6 in)	4 December 1950

Latest Records

Latest records at Harpers Ferry River
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
22 June 1972	Harpers Ferry River, US	monthly rain	134.6 mm (5.3 in)	50.0 mm (2.0 in)	68 years	78 of 100 (Major)
25 November 1971	Harpers Ferry River, US	daily rain	58.4 mm (2.3 in)	0.2 mm (0.01 in)	20 years	14 of 100 (Routine)
26 October 1971	Harpers Ferry River, US	daily rain	53.3 mm (2.1 in)	24.6 mm (1.0 in)	4 years	23 of 100 (Routine)
17 September 1971	Harpers Ferry River, US	daily rain	50.8 mm (2.0 in)	17.0 mm (0.7 in)	36 years	30 of 100 (Routine)
12 September 1971	Harpers Ferry River, US	daily rain	79.0 mm (3.1 in)	48.3 mm (1.9 in)	20 years	46 of 100 (Notable)
30 July 1971	Harpers Ferry River, US	daily rain	54.1 mm (2.1 in)	3.3 mm (0.13 in)	0 years	10 of 100 (Routine)
31 May 1971	Harpers Ferry River, US	daily rain	57.2 mm (2.3 in)	27.5 mm (1.1 in)	17 years	38 of 100 (Notable)
7 April 1971	Harpers Ferry River, US	daily rain	30.7 mm (1.2 in)	13.7 mm (0.5 in)	17 years	25 of 100 (Routine)
5 January 1971	Harpers Ferry River, US	daily rain	14.7 mm (0.6 in)	0.5 mm (0.02 in)	73 years	20 of 100 (Routine)
1 January 1971	Harpers Ferry River, US	daily rain	38.1 mm (1.5 in)	3.6 mm (0.14 in)	39 years	23 of 100 (Routine)
31 October 1970	Harpers Ferry River, US	daily rain	21.1 mm (0.8 in)	1.3 mm (0.05 in)	20 years	14 of 100 (Routine)
30 July 1970	Harpers Ferry River, US	daily rain	50.8 mm (2.0 in)	11.2 mm (0.4 in)	80 years	41 of 100 (Notable)
10 July 1970	Harpers Ferry River, US	daily rain	56.4 mm (2.2 in)	31.5 mm (1.2 in)	20 years	39 of 100 (Notable)
6 June 1970	Harpers Ferry River, US	daily rain	38.9 mm (1.5 in)	14.5 mm (0.6 in)	73 years	43 of 100 (Notable)
30 March 1970	Harpers Ferry River, US	daily rain	21.6 mm (0.9 in)	3.6 mm (0.14 in)	71 years	20 of 100 (Routine)
10 February 1970	Harpers Ferry River, US	daily rain (Tie)	33.0 mm (1.3 in)	tie	12 years	2 of 100 (Routine)
31 December 1969	Harpers Ferry River, US	daily rain	29.5 mm (1.2 in)	5.9 mm (0.23 in)	46 years	27 of 100 (Routine)
26 December 1969	Harpers Ferry River, US	daily rain	40.6 mm (1.6 in)	12.4 mm (0.5 in)	12 years	23 of 100 (Routine)
4 August 1969	Harpers Ferry River, US	daily rain	54.6 mm (2.1 in)	25.4 mm (1.0 in)	2 years	26 of 100 (Routine)
25 March 1969	Harpers Ferry River, US	daily rain	20.1 mm (0.8 in)	3.6 mm (0.14 in)	70 years	20 of 100 (Routine)

Extremes by Year

1889 to 1972

Yearly extremes at Harpers Ferry River: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	141.7 mm (5.6 in)	1956	63.1 mm (2.5 in)	84
Wettest five days (Rx5day)	198.3 mm (7.8 in)	1956	87.9 mm (3.5 in)	84
Longest dry spell (CDD)	43 days	1930	21 days	84

Wettest day (Rx1day)

The wettest day of the year at Harpers Ferry River, 1889 to 1972. The record is 141.7 mm (5.6 in) in 1956, marked on the chart; the median year is 63.1 mm (2.5 in).

Wettest day (Rx1day) at Harpers Ferry River by year
Year	Wettest day (Rx1day)
1889	61.0 mm (2.4 in)
1890	78.7 mm (3.1 in)
1891	48.3 mm (1.9 in)
1892	65.0 mm (2.6 in)
1893	78.7 mm (3.1 in)
1894	66.5 mm (2.6 in)
1895	28.4 mm (1.1 in)
1896	78.7 mm (3.1 in)
1897	43.7 mm (1.7 in)
1898	74.7 mm (2.9 in)
1899	95.3 mm (3.8 in)
1900	45.7 mm (1.8 in)
1901	101.6 mm (4.0 in)
1902	43.2 mm (1.7 in)
1903	50.8 mm (2.0 in)
1904	84.6 mm (3.3 in)
1905	49.3 mm (1.9 in)
1906	88.9 mm (3.5 in)
1907	63.5 mm (2.5 in)
1908	58.9 mm (2.3 in)
1909	58.4 mm (2.3 in)
1910	61.0 mm (2.4 in)
1911	101.1 mm (4.0 in)
1912	116.8 mm (4.6 in)
1913	50.8 mm (2.0 in)
1914	54.6 mm (2.1 in)
1915	64.0 mm (2.5 in)
1916	50.8 mm (2.0 in)
1917	53.3 mm (2.1 in)
1918	50.8 mm (2.0 in)
1919	50.8 mm (2.0 in)
1920	76.2 mm (3.0 in)
1921	48.3 mm (1.9 in)
1922	75.7 mm (3.0 in)
1923	33.5 mm (1.3 in)
1924	87.4 mm (3.4 in)
1925	29.7 mm (1.2 in)
1926	71.1 mm (2.8 in)
1927	121.9 mm (4.8 in)
1928	69.3 mm (2.7 in)
1929	82.3 mm (3.2 in)
1930	62.5 mm (2.5 in)
1931	48.5 mm (1.9 in)
1932	79.8 mm (3.1 in)
1933	94.0 mm (3.7 in)
1934	55.4 mm (2.2 in)
1935	69.9 mm (2.8 in)
1936	78.5 mm (3.1 in)
1937	92.7 mm (3.6 in)
1938	71.1 mm (2.8 in)
1939	74.2 mm (2.9 in)
1940	84.6 mm (3.3 in)
1941	37.1 mm (1.5 in)
1942	50.8 mm (2.0 in)
1943	54.6 mm (2.1 in)
1944	54.6 mm (2.1 in)
1945	96.3 mm (3.8 in)
1946	53.3 mm (2.1 in)
1947	46.7 mm (1.8 in)
1948	81.3 mm (3.2 in)
1949	47.8 mm (1.9 in)
1950	66.0 mm (2.6 in)
1951	41.9 mm (1.6 in)
1952	78.7 mm (3.1 in)
1953	74.4 mm (2.9 in)
1954	113.3 mm (4.5 in)
1955	108.0 mm (4.3 in)
1956	141.7 mm (5.6 in)
1957	45.0 mm (1.8 in)
1958	55.1 mm (2.2 in)
1959	60.2 mm (2.4 in)
1960	71.4 mm (2.8 in)
1961	37.1 mm (1.5 in)
1962	58.9 mm (2.3 in)
1963	61.7 mm (2.4 in)
1964	85.3 mm (3.4 in)
1965	62.0 mm (2.4 in)
1966	108.0 mm (4.3 in)
1967	38.9 mm (1.5 in)
1968	62.7 mm (2.5 in)
1969	54.6 mm (2.1 in)
1970	56.4 mm (2.2 in)
1971	79.0 mm (3.1 in)
1972	134.6 mm (5.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Harpers Ferry River, 1889 to 1972. The record is 198.3 mm (7.8 in) in 1956, marked on the chart; the median year is 87.9 mm (3.5 in).

Wettest five days (Rx5day) at Harpers Ferry River by year
Year	Wettest five days (Rx5day)
1889	68.6 mm (2.7 in)
1890	96.2 mm (3.8 in)
1891	61.0 mm (2.4 in)
1892	67.3 mm (2.6 in)
1893	78.7 mm (3.1 in)
1894	89.6 mm (3.5 in)
1895	62.4 mm (2.5 in)
1896	78.7 mm (3.1 in)
1897	62.2 mm (2.4 in)
1898	130.6 mm (5.1 in)
1899	95.3 mm (3.8 in)
1900	69.6 mm (2.7 in)
1901	143.5 mm (5.6 in)
1902	64.5 mm (2.5 in)
1903	97.2 mm (3.8 in)
1904	102.9 mm (4.1 in)
1905	76.2 mm (3.0 in)
1906	170.4 mm (6.7 in)
1907	88.2 mm (3.5 in)
1908	90.1 mm (3.5 in)
1909	78.8 mm (3.1 in)
1910	69.1 mm (2.7 in)
1911	154.2 mm (6.1 in)
1912	196.8 mm (7.7 in)
1913	57.3 mm (2.3 in)
1914	70.6 mm (2.8 in)
1915	120.4 mm (4.7 in)
1916	85.5 mm (3.4 in)
1917	84.8 mm (3.3 in)
1918	118.1 mm (4.6 in)
1919	67.3 mm (2.6 in)
1920	87.7 mm (3.5 in)
1921	68.6 mm (2.7 in)
1922	80.9 mm (3.2 in)
1923	42.9 mm (1.7 in)
1924	194.6 mm (7.7 in)
1925	49.9 mm (2.0 in)
1926	108.4 mm (4.3 in)
1927	126.0 mm (5.0 in)
1928	88.1 mm (3.5 in)
1929	143.0 mm (5.6 in)
1930	64.8 mm (2.6 in)
1931	61.2 mm (2.4 in)
1932	119.7 mm (4.7 in)
1933	109.5 mm (4.3 in)
1934	79.1 mm (3.1 in)
1935	126.7 mm (5.0 in)
1936	94.7 mm (3.7 in)
1937	163.5 mm (6.4 in)
1938	96.0 mm (3.8 in)
1939	123.2 mm (4.9 in)
1940	85.1 mm (3.4 in)
1941	70.9 mm (2.8 in)
1942	145.0 mm (5.7 in)
1943	62.0 mm (2.4 in)
1944	79.3 mm (3.1 in)
1945	137.9 mm (5.4 in)
1946	77.3 mm (3.0 in)
1947	52.1 mm (2.1 in)
1948	107.0 mm (4.2 in)
1949	100.6 mm (4.0 in)
1950	119.8 mm (4.7 in)
1951	110.2 mm (4.3 in)
1952	145.3 mm (5.7 in)
1953	75.7 mm (3.0 in)
1954	117.1 mm (4.6 in)
1955	126.3 mm (5.0 in)
1956	198.3 mm (7.8 in)
1957	62.5 mm (2.5 in)
1958	69.1 mm (2.7 in)
1959	72.4 mm (2.9 in)
1960	103.2 mm (4.1 in)
1961	63.0 mm (2.5 in)
1962	61.4 mm (2.4 in)
1963	80.8 mm (3.2 in)
1964	93.2 mm (3.7 in)
1965	76.0 mm (3.0 in)
1966	155.5 mm (6.1 in)
1967	77.5 mm (3.1 in)
1968	94.2 mm (3.7 in)
1969	75.1 mm (3.0 in)
1970	74.5 mm (2.9 in)
1971	113.3 mm (4.5 in)
1972	192.3 mm (7.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Harpers Ferry River, 1889 to 1972. The record is 43 days in 1930, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Harpers Ferry River by year
Year	Longest dry spell (CDD)
1889	27 days
1890	16 days
1891	34 days
1892	41 days
1893	28 days
1894	20 days
1895	18 days
1896	23 days
1897	17 days
1898	20 days
1899	12 days
1900	18 days
1901	40 days
1902	33 days
1903	19 days
1904	21 days
1905	22 days
1906	19 days
1907	22 days
1908	26 days
1909	19 days
1910	26 days
1911	29 days
1912	27 days
1913	19 days
1914	30 days
1915	23 days
1916	20 days
1917	28 days
1918	16 days
1919	21 days
1920	26 days
1921	22 days
1922	35 days
1923	25 days
1924	26 days
1925	14 days
1926	16 days
1927	15 days
1928	18 days
1929	25 days
1930	43 days
1931	29 days
1932	19 days
1933	31 days
1934	19 days
1935	27 days
1936	17 days
1937	14 days
1938	16 days
1939	24 days
1940	13 days
1941	28 days
1942	16 days
1943	33 days
1944	25 days
1945	15 days
1946	17 days
1947	33 days
1948	11 days
1949	19 days
1950	15 days
1951	22 days
1952	28 days
1953	26 days
1954	14 days
1955	21 days
1956	16 days
1957	14 days
1958	19 days
1959	14 days
1960	30 days
1961	15 days
1962	24 days
1963	27 days
1964	18 days
1965	15 days
1966	20 days
1967	19 days
1968	29 days
1969	24 days
1970	16 days
1971	25 days
1972	9 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

77 years, 1891 to 1971

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 140.6 mm (5.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Harpers Ferry River: 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	84.8 mm (3.3 in)
10 years	98.3 mm (3.9 in)
25 years	115.4 mm (4.5 in)
50 years	128.0 mm (5.0 in)
100 years	140.6 mm (5.5 in)	Longer than the 77 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, 77 years of values from 1891 to 1971.

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: 141.7 mm (5.6 in) in 1956; 121.9 mm (4.8 in) in 1927; 116.8 mm (4.6 in) in 1912.

Download the Data

Data for Harpers Ferry River standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Harpers Ferry River 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a