Edgemont Weather Records (USC00182770)

Record envelope, standing records and threshold days for Edgemont (USC00182770), Maryland, United States, with 103 years of record.

Key Facts for Edgemont

Edgemont (USC00182770) is a weather station in Maryland, United States at 39.67 latitude and -77.55 longitude, 276 m (905 ft) above sea level.
The station reports from 1893 to 1995, 103 years of record.
684 records set at Edgemont still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Edgemont set a daily record precipitation of 26.4 mm (1.0 in) on 17 September 1995.

About the Station

Location: Maryland, United States, 39.67 latitude, -77.55 longitude.
Elevation: 276 m (905 ft).
Period of record: 1893 to 1995, 103 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 Edgemont. 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 Edgemont, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	14.4 C (57.9 F)	-20.0 C (-4.0 F)	n/a	n/a
Feb	15.0 C (59.0 F)	-15.6 C (3.9 F)	n/a	n/a
Mar	15.6 C (60.1 F)	-12.2 C (10.0 F)	n/a	n/a
Apr	24.4 C (75.9 F)	-0.6 C (30.9 F)	n/a	n/a
May	28.3 C (82.9 F)	0.6 C (33.1 F)	n/a	n/a
Jun	34.4 C (93.9 F)	6.7 C (44.1 F)	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

684 standing records

684 records at Edgemont still stand. 1893 holds the most, with 456.

All-Time Record Progression

2 new records

2 all-time records were set at Edgemont between 6 September 1979 and 12 February 1983. Each dot is a new record.

When Edgemont set new all-time records
Date	Kind	Detail
1979-09-06	Record daily precipitation	Record daily precipitation 163.6 mm (6.4 in)
1983-02-12	Record daily snowfall	Record daily snowfall 63.5 cm (25.0 in)

Wettest Day of Each Month

Sep: 163.6 mm (6.4 in)

The wettest day on record for each calendar month at Edgemont. The most was 163.6 mm (6.4 in) on 6 September 1979.

Record daily precipitation for each month at Edgemont
Month	Record daily precipitation (mm)	Date
Jan	77.5 mm (3.1 in)	4 January 1944
Feb	52.6 mm (2.1 in)	12 February 1983
Mar	71.1 mm (2.8 in)	5 March 1993
Apr	101.1 mm (4.0 in)	22 April 1992
May	84.8 mm (3.3 in)	21 May 1986
Jun	142.2 mm (5.6 in)	22 June 1972
Jul	129.8 mm (5.1 in)	13 July 1949
Aug	103.1 mm (4.1 in)	13 August 1955
Sep	163.6 mm (6.4 in)	6 September 1979
Oct	116.8 mm (4.6 in)	13 October 1990
Nov	102.1 mm (4.0 in)	22 November 1952
Dec	119.4 mm (4.7 in)	11 December 1992

Period of Record Coverage

1893 to 1976

3 years of record at Edgemont, 1893 to 1976. 3 years have data for under 90 percent of days and are left out of rankings: 1893, 1975, 1976.

Latest Records

Latest records at Edgemont
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 1995	Edgemont, US	daily rain	26.4 mm (1.0 in)	4.8 mm (0.19 in)	18 years	12 of 100 (Routine)
6 August 1995	Edgemont, US	daily rain	41.1 mm (1.6 in)	23.3 mm (0.9 in)	8 years	25 of 100 (Routine)
9 March 1995	Edgemont, US	daily snowfall	16.5 cm (6.5 in)	6.3 cm (2.5 in)	53 years	27 of 100 (Routine)
9 March 1995	Edgemont, US	daily rain	21.6 mm (0.9 in)	2.8 mm (0.11 in)	33 years	17 of 100 (Routine)
16 January 1995	Edgemont, US	daily rain	25.4 mm (1.0 in)	2.0 mm (0.08 in)	49 years	21 of 100 (Routine)
17 November 1994	Edgemont, US	daily rain	20.1 mm (0.8 in)	1.8 mm (0.07 in)	8 years	8 of 100 (Routine)
22 August 1994	Edgemont, US	daily rain	29.7 mm (1.2 in)	6.3 mm (0.25 in)	33 years	20 of 100 (Routine)
18 August 1994	Edgemont, US	daily rain	69.6 mm (2.7 in)	15.8 mm (0.6 in)	39 years	28 of 100 (Routine)
8 May 1994	Edgemont, US	daily rain	29.5 mm (1.2 in)	4.6 mm (0.18 in)	40 years	21 of 100 (Routine)
28 March 1994	Edgemont, US	daily rain	26.7 mm (1.1 in)	6.4 mm (0.25 in)	0 years	11 of 100 (Routine)
10 March 1994	Edgemont, US	daily rain	35.6 mm (1.4 in)	18.6 mm (0.7 in)	17 years	27 of 100 (Routine)
3 March 1994	Edgemont, US	daily rain	37.8 mm (1.5 in)	9.9 mm (0.39 in)	52 years	29 of 100 (Routine)
3 March 1994	Edgemont, US	daily snowfall (Tie)	12.7 cm (5.0 in)	tie	33 years	3 of 100 (Routine)
23 February 1994	Edgemont, US	daily snowfall	14.7 cm (5.8 in)	7.1 cm (2.8 in)	8 years	15 of 100 (Routine)
9 February 1994	Edgemont, US	daily rain	27.9 mm (1.1 in)	2.0 mm (0.08 in)	44 years	20 of 100 (Routine)
18 January 1994	Edgemont, US	daily rain	36.6 mm (1.4 in)	12.2 mm (0.5 in)	16 years	22 of 100 (Routine)
18 January 1994	Edgemont, US	daily snowfall	25.4 cm (10.0 in)	10.2 cm (4.0 in)	16 years	22 of 100 (Routine)
5 December 1993	Edgemont, US	daily rain	60.7 mm (2.4 in)	20.1 mm (0.8 in)	42 years	34 of 100 (Routine)
28 November 1993	Edgemont, US	daily rain	75.7 mm (3.0 in)	49.0 mm (1.9 in)	27 years	49 of 100 (Notable)
4 September 1993	Edgemont, US	daily rain	79.5 mm (3.1 in)	45.2 mm (1.8 in)	2 years	29 of 100 (Routine)

Extremes by Year

1893 to 1995

Yearly extremes at Edgemont: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	34.4 C (93.9 F)	1975	28.3 C (82.9 F)	3
Coldest night (TNn)	-20.0 C (-4.0 F)	1893	0.6 C (33.1 F)	3
Wettest day (Rx1day)	163.6 mm (6.4 in)	1979	61.0 mm (2.4 in)	58
Wettest five days (Rx5day)	239.6 mm (9.4 in)	1975	96.9 mm (3.8 in)	58
Longest dry spell (CDD)	33 days	1995	16 days	58

Hottest day (TXx)

The hottest day of the year at Edgemont, 1893 to 1995. The record is 34.4 C (93.9 F) in 1975, marked on the chart; the median year is 28.3 C (82.9 F).

Hottest day (TXx) at Edgemont by year
Year	Hottest day (TXx)
1893	24.4 C (75.9 F)
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	34.4 C (93.9 F)
1976	28.3 C (82.9 F)
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

Coldest night (TNn)

The coldest night of the year at Edgemont, 1893 to 1995. The record is -20.0 C (-4.0 F) in 1893, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at Edgemont by year
Year	Coldest night (TNn)
1893	-20.0 C (-4.0 F)
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	6.7 C (44.1 F)
1976	0.6 C (33.1 F)
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

Wettest day (Rx1day)

The wettest day of the year at Edgemont, 1893 to 1995. The record is 163.6 mm (6.4 in) in 1979, marked on the chart; the median year is 61.0 mm (2.4 in).

Wettest day (Rx1day) at Edgemont by year
Year	Wettest day (Rx1day)
1893	n/a
1938	30.5 mm (1.2 in)
1939	33.5 mm (1.3 in)
1940	61.0 mm (2.4 in)
1941	30.5 mm (1.2 in)
1942	76.2 mm (3.0 in)
1943	54.6 mm (2.1 in)
1944	77.5 mm (3.1 in)
1945	45.7 mm (1.8 in)
1946	56.9 mm (2.2 in)
1947	50.8 mm (2.0 in)
1948	77.5 mm (3.1 in)
1949	129.8 mm (5.1 in)
1950	101.6 mm (4.0 in)
1951	89.7 mm (3.5 in)
1952	113.8 mm (4.5 in)
1953	53.8 mm (2.1 in)
1954	86.4 mm (3.4 in)
1955	103.1 mm (4.1 in)
1956	66.0 mm (2.6 in)
1957	52.3 mm (2.1 in)
1958	54.6 mm (2.1 in)
1959	50.8 mm (2.0 in)
1960	55.4 mm (2.2 in)
1961	54.6 mm (2.1 in)
1962	88.4 mm (3.5 in)
1963	53.8 mm (2.1 in)
1964	56.9 mm (2.2 in)
1965	61.5 mm (2.4 in)
1966	156.2 mm (6.1 in)
1967	46.7 mm (1.8 in)
1968	110.7 mm (4.4 in)
1969	40.6 mm (1.6 in)
1970	66.5 mm (2.6 in)
1971	64.0 mm (2.5 in)
1972	142.2 mm (5.6 in)
1973	58.9 mm (2.3 in)
1974	58.4 mm (2.3 in)
1975	89.7 mm (3.5 in)
1976	64.8 mm (2.6 in)
1977	40.9 mm (1.6 in)
1978	55.1 mm (2.2 in)
1979	163.6 mm (6.4 in)
1980	43.7 mm (1.7 in)
1981	60.5 mm (2.4 in)
1982	51.3 mm (2.0 in)
1983	66.5 mm (2.6 in)
1984	61.0 mm (2.4 in)
1985	62.2 mm (2.4 in)
1986	84.8 mm (3.3 in)
1987	59.4 mm (2.3 in)
1988	51.6 mm (2.0 in)
1989	53.1 mm (2.1 in)
1990	116.8 mm (4.6 in)
1991	108.5 mm (4.3 in)
1992	119.4 mm (4.7 in)
1993	79.5 mm (3.1 in)
1994	69.6 mm (2.7 in)
1995	41.1 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Edgemont, 1893 to 1995. The record is 239.6 mm (9.4 in) in 1975, marked on the chart; the median year is 96.9 mm (3.8 in).

Wettest five days (Rx5day) at Edgemont by year
Year	Wettest five days (Rx5day)
1893	n/a
1938	50.3 mm (2.0 in)
1939	93.7 mm (3.7 in)
1940	96.5 mm (3.8 in)
1941	43.7 mm (1.7 in)
1942	120.2 mm (4.7 in)
1943	98.3 mm (3.9 in)
1944	87.6 mm (3.4 in)
1945	83.6 mm (3.3 in)
1946	84.0 mm (3.3 in)
1947	89.9 mm (3.5 in)
1948	99.1 mm (3.9 in)
1949	171.5 mm (6.8 in)
1950	115.1 mm (4.5 in)
1951	104.5 mm (4.1 in)
1952	199.2 mm (7.8 in)
1953	70.6 mm (2.8 in)
1954	93.5 mm (3.7 in)
1955	145.2 mm (5.7 in)
1956	78.0 mm (3.1 in)
1957	70.6 mm (2.8 in)
1958	88.1 mm (3.5 in)
1959	50.8 mm (2.0 in)
1960	83.7 mm (3.3 in)
1961	106.9 mm (4.2 in)
1962	89.4 mm (3.5 in)
1963	81.2 mm (3.2 in)
1964	68.6 mm (2.7 in)
1965	92.8 mm (3.7 in)
1966	194.8 mm (7.7 in)
1967	74.6 mm (2.9 in)
1968	112.0 mm (4.4 in)
1969	56.3 mm (2.2 in)
1970	98.5 mm (3.9 in)
1971	92.7 mm (3.6 in)
1972	212.5 mm (8.4 in)
1973	82.5 mm (3.2 in)
1974	73.7 mm (2.9 in)
1975	239.6 mm (9.4 in)
1976	118.6 mm (4.7 in)
1977	79.8 mm (3.1 in)
1978	144.0 mm (5.7 in)
1979	165.9 mm (6.5 in)
1980	63.7 mm (2.5 in)
1981	88.6 mm (3.5 in)
1982	106.4 mm (4.2 in)
1983	110.5 mm (4.4 in)
1984	105.2 mm (4.1 in)
1985	108.7 mm (4.3 in)
1986	101.6 mm (4.0 in)
1987	128.5 mm (5.1 in)
1988	132.9 mm (5.2 in)
1989	96.8 mm (3.8 in)
1990	151.9 mm (6.0 in)
1991	108.5 mm (4.3 in)
1992	165.1 mm (6.5 in)
1993	97.1 mm (3.8 in)
1994	99.3 mm (3.9 in)
1995	53.6 mm (2.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Edgemont, 1893 to 1995. The record is 33 days in 1995, marked on the chart; the median year is 16 days.

Longest dry spell (CDD) at Edgemont by year
Year	Longest dry spell (CDD)
1893	n/a
1938	13 days
1939	16 days
1940	13 days
1941	28 days
1942	14 days
1943	19 days
1944	18 days
1945	15 days
1946	18 days
1947	24 days
1948	10 days
1949	19 days
1950	15 days
1951	16 days
1952	28 days
1953	23 days
1954	12 days
1955	21 days
1956	16 days
1957	16 days
1958	14 days
1959	14 days
1960	17 days
1961	15 days
1962	18 days
1963	27 days
1964	18 days
1965	14 days
1966	19 days
1967	14 days
1968	26 days
1969	13 days
1970	16 days
1971	23 days
1972	13 days
1973	18 days
1974	23 days
1975	11 days
1976	20 days
1977	15 days
1978	16 days
1979	15 days
1980	15 days
1981	15 days
1982	13 days
1983	14 days
1984	13 days
1985	13 days
1986	21 days
1987	23 days
1988	29 days
1989	16 days
1990	21 days
1991	23 days
1992	19 days
1993	17 days
1994	15 days
1995	33 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

51 years, 1939 to 1994

A day with at least 63.4 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 198.6 mm (7.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Edgemont: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	63.4 mm (2.5 in)
5 years	88.0 mm (3.5 in)
10 years	108.1 mm (4.3 in)
25 years	139.0 mm (5.5 in)
50 years	166.5 mm (6.6 in)
100 years	198.6 mm (7.8 in)	Longer than the 51 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, 51 years of values from 1939 to 1994.

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: 163.6 mm (6.4 in) in 1979; 156.2 mm (6.1 in) in 1966; 142.2 mm (5.6 in) in 1972.

Download the Data

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