Speedwell Weather Records (USC00447971)

Record envelope, standing records and threshold days for Speedwell (USC00447971), Virginia, United States, with 46 years of record.

Key Facts for Speedwell

Speedwell (USC00447971) is a weather station in Virginia, United States at 36.82 latitude and -81.17 longitude, 714 m (2,343 ft) above sea level.
The station reports from 1940 to 1985, 46 years of record.
6 records set at Speedwell still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Speedwell set a monthly record daily precipitation of 67.6 mm (2.7 in) on 18 August 1985.

About the Station

Location: Virginia, United States, 36.82 latitude, -81.17 longitude.
Elevation: 714 m (2,343 ft).
Period of record: 1940 to 1985, 46 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 Speedwell. 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 Speedwell, 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	-15.0 C (5.0 F)	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	-14.4 C (6.1 F)	n/a	n/a	n/a

Which Years Hold Standing Records

6 standing records

6 records at Speedwell still stand. 1968 holds the most, with 4.

Wettest Day of Each Month

Sep: 110.5 mm (4.4 in)

The wettest day on record for each calendar month at Speedwell. The most was 110.5 mm (4.4 in) on 30 September 1959.

Record daily precipitation for each month at Speedwell
Month	Record daily precipitation (mm)	Date
Jan	48.3 mm (1.9 in)	22 January 1959
Feb	61.0 mm (2.4 in)	3 February 1982
Mar	60.7 mm (2.4 in)	24 March 1979
Apr	59.7 mm (2.4 in)	5 April 1957
May	83.8 mm (3.3 in)	28 May 1973
Jun	66.0 mm (2.6 in)	21 June 1972
Jul	82.6 mm (3.3 in)	8 July 1963
Aug	67.6 mm (2.7 in)	18 August 1985
Sep	110.5 mm (4.4 in)	30 September 1959
Oct	68.6 mm (2.7 in)	17 October 1964
Nov	76.2 mm (3.0 in)	10 November 1962
Dec	57.2 mm (2.3 in)	29 December 1958

Period of Record Coverage

1968 to 1971

2 years of record at Speedwell, 1968 to 1971. 2 years have data for under 90 percent of days and are left out of rankings: 1968, 1971.

Latest Records

Latest records at Speedwell
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 1985	Speedwell, US	monthly rain	67.6 mm (2.7 in)	2.3 mm (0.09 in)	35 years	26 of 100 (Routine)
17 August 1985	Speedwell, US	daily rain	27.9 mm (1.1 in)	8.3 mm (0.33 in)	44 years	24 of 100 (Routine)
6 June 1985	Speedwell, US	daily rain	10.2 mm (0.4 in)	1.3 mm (0.05 in)	28 years	13 of 100 (Routine)
4 April 1985	Speedwell, US	monthly snowfall	7.6 cm (3.0 in)	2.5 cm (1.0 in)	24 years	26 of 100 (Routine)
12 February 1985	Speedwell, US	daily rain	30.5 mm (1.2 in)	16.5 mm (0.6 in)	41 years	33 of 100 (Routine)
29 November 1984	Speedwell, US	daily rain	30.5 mm (1.2 in)	5.1 mm (0.20 in)	21 years	14 of 100 (Routine)
11 November 1984	Speedwell, US	daily rain	26.7 mm (1.1 in)	15.3 mm (0.6 in)	18 years	22 of 100 (Routine)
23 October 1984	Speedwell, US	daily rain	31.8 mm (1.3 in)	5.9 mm (0.23 in)	13 years	11 of 100 (Routine)
14 August 1984	Speedwell, US	daily rain (Tie)	15.7 mm (0.6 in)	tie	44 years	4 of 100 (Routine)
10 August 1984	Speedwell, US	daily rain	38.1 mm (1.5 in)	1.5 mm (0.06 in)	14 years	9 of 100 (Routine)
26 June 1984	Speedwell, US	daily rain	38.1 mm (1.5 in)	16.5 mm (0.6 in)	4 years	20 of 100 (Routine)
23 February 1984	Speedwell, US	daily rain	25.9 mm (1.0 in)	8.1 mm (0.32 in)	28 years	20 of 100 (Routine)
23 February 1984	Speedwell, US	daily snowfall	12.7 cm (5.0 in)	1.3 cm (0.5 in)	14 years	10 of 100 (Routine)
14 February 1984	Speedwell, US	daily rain	14.5 mm (0.6 in)	0.5 mm (0.02 in)	32 years	13 of 100 (Routine)
18 January 1984	Speedwell, US	daily rain	15.2 mm (0.6 in)	1.7 mm (0.07 in)	4 years	6 of 100 (Routine)
4 June 1983	Speedwell, US	daily rain	23.4 mm (0.9 in)	4.9 mm (0.19 in)	4 years	9 of 100 (Routine)
10 April 1983	Speedwell, US	daily rain	30.5 mm (1.2 in)	5.1 mm (0.20 in)	21 years	15 of 100 (Routine)
6 April 1983	Speedwell, US	daily rain	20.3 mm (0.8 in)	13.9 mm (0.5 in)	24 years	20 of 100 (Routine)
18 March 1983	Speedwell, US	daily rain	35.3 mm (1.4 in)	7.4 mm (0.29 in)	28 years	19 of 100 (Routine)
21 December 1982	Speedwell, US	daily snowfall	3.8 cm (1.5 in)	1.3 cm (0.5 in)	31 years	15 of 100 (Routine)

Extremes by Year

1940 to 1985

Yearly extremes at Speedwell: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	-14.4 C (6.1 F)	1968	-14.7 C (5.5 F)	2
Wettest day (Rx1day)	110.5 mm (4.4 in)	1959	54.8 mm (2.2 in)	46
Wettest five days (Rx5day)	133.4 mm (5.3 in)	1945	90.5 mm (3.6 in)	46
Longest dry spell (CDD)	41 days	1978	21 days	46

Hottest day (TXx)

The hottest day of the year at Speedwell, 1940 to 1985. The record is -14.4 C (6.1 F) in 1968, marked on the chart; the median year is -14.7 C (5.5 F).

Hottest day (TXx) at Speedwell by year
Year	Hottest day (TXx)
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	-14.4 C (6.1 F)
1969	n/a
1970	n/a
1971	-15.0 C (5.0 F)
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

Wettest day (Rx1day)

The wettest day of the year at Speedwell, 1940 to 1985. The record is 110.5 mm (4.4 in) in 1959, marked on the chart; the median year is 54.8 mm (2.2 in).

Wettest day (Rx1day) at Speedwell by year
Year	Wettest day (Rx1day)
1940	76.5 mm (3.0 in)
1941	41.9 mm (1.6 in)
1942	50.8 mm (2.0 in)
1943	47.2 mm (1.9 in)
1944	63.5 mm (2.5 in)
1945	59.7 mm (2.4 in)
1946	48.3 mm (1.9 in)
1947	61.0 mm (2.4 in)
1948	61.2 mm (2.4 in)
1949	65.3 mm (2.6 in)
1950	45.7 mm (1.8 in)
1951	27.9 mm (1.1 in)
1952	38.1 mm (1.5 in)
1953	52.6 mm (2.1 in)
1954	73.7 mm (2.9 in)
1955	50.8 mm (2.0 in)
1956	62.2 mm (2.4 in)
1957	59.7 mm (2.4 in)
1958	57.2 mm (2.3 in)
1959	110.5 mm (4.4 in)
1960	50.8 mm (2.0 in)
1961	52.1 mm (2.1 in)
1962	76.2 mm (3.0 in)
1963	82.6 mm (3.3 in)
1964	68.6 mm (2.7 in)
1965	41.4 mm (1.6 in)
1966	86.1 mm (3.4 in)
1967	41.7 mm (1.6 in)
1968	54.1 mm (2.1 in)
1969	57.2 mm (2.3 in)
1970	47.0 mm (1.9 in)
1971	45.7 mm (1.8 in)
1972	66.0 mm (2.6 in)
1973	83.8 mm (3.3 in)
1974	63.0 mm (2.5 in)
1975	47.0 mm (1.9 in)
1976	55.4 mm (2.2 in)
1977	35.1 mm (1.4 in)
1978	48.3 mm (1.9 in)
1979	60.7 mm (2.4 in)
1980	40.9 mm (1.6 in)
1981	38.9 mm (1.5 in)
1982	61.0 mm (2.4 in)
1983	41.9 mm (1.6 in)
1984	39.9 mm (1.6 in)
1985	67.6 mm (2.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Speedwell, 1940 to 1985. The record is 133.4 mm (5.3 in) in 1945, marked on the chart; the median year is 90.5 mm (3.6 in).

Wettest five days (Rx5day) at Speedwell by year
Year	Wettest five days (Rx5day)
1940	122.0 mm (4.8 in)
1941	62.2 mm (2.4 in)
1942	93.2 mm (3.7 in)
1943	81.0 mm (3.2 in)
1944	99.1 mm (3.9 in)
1945	133.4 mm (5.3 in)
1946	72.4 mm (2.9 in)
1947	65.8 mm (2.6 in)
1948	94.5 mm (3.7 in)
1949	78.0 mm (3.1 in)
1950	71.6 mm (2.8 in)
1951	53.8 mm (2.1 in)
1952	83.6 mm (3.3 in)
1953	109.8 mm (4.3 in)
1954	99.6 mm (3.9 in)
1955	69.0 mm (2.7 in)
1956	101.6 mm (4.0 in)
1957	123.2 mm (4.9 in)
1958	97.8 mm (3.9 in)
1959	129.6 mm (5.1 in)
1960	78.7 mm (3.1 in)
1961	99.2 mm (3.9 in)
1962	88.9 mm (3.5 in)
1963	85.1 mm (3.4 in)
1964	95.5 mm (3.8 in)
1965	63.0 mm (2.5 in)
1966	89.1 mm (3.5 in)
1967	105.0 mm (4.1 in)
1968	105.4 mm (4.1 in)
1969	102.1 mm (4.0 in)
1970	72.4 mm (2.9 in)
1971	89.7 mm (3.5 in)
1972	105.9 mm (4.2 in)
1973	101.1 mm (4.0 in)
1974	66.8 mm (2.6 in)
1975	102.7 mm (4.0 in)
1976	91.2 mm (3.6 in)
1977	54.9 mm (2.2 in)
1978	101.1 mm (4.0 in)
1979	67.5 mm (2.7 in)
1980	78.0 mm (3.1 in)
1981	70.0 mm (2.8 in)
1982	74.6 mm (2.9 in)
1983	81.3 mm (3.2 in)
1984	115.3 mm (4.5 in)
1985	95.5 mm (3.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Speedwell, 1940 to 1985. The record is 41 days in 1978, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Speedwell by year
Year	Longest dry spell (CDD)
1940	14 days
1941	20 days
1942	23 days
1943	27 days
1944	18 days
1945	16 days
1946	24 days
1947	16 days
1948	23 days
1949	27 days
1950	19 days
1951	17 days
1952	23 days
1953	22 days
1954	32 days
1955	24 days
1956	23 days
1957	21 days
1958	23 days
1959	20 days
1960	29 days
1961	15 days
1962	18 days
1963	33 days
1964	15 days
1965	34 days
1966	30 days
1967	24 days
1968	35 days
1969	22 days
1970	20 days
1971	20 days
1972	20 days
1973	19 days
1974	17 days
1975	20 days
1976	23 days
1977	20 days
1978	41 days
1979	18 days
1980	17 days
1981	20 days
1982	30 days
1983	17 days
1984	24 days
1985	16 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

35 years, 1942 to 1984

A day with at least 53.1 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 114.7 mm (4.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Speedwell: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	53.1 mm (2.1 in)
5 years	67.9 mm (2.7 in)
10 years	78.3 mm (3.1 in)
25 years	92.3 mm (3.6 in)
50 years	103.3 mm (4.1 in)	Longer than the 35 years of record
100 years	114.7 mm (4.5 in)	Longer than the 35 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, 35 years of values from 1942 to 1984.

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: 110.5 mm (4.4 in) in 1959; 86.1 mm (3.4 in) in 1966; 83.8 mm (3.3 in) in 1973.

Download the Data

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