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Weather & Climate in Dumbarton, VA

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Dumbarton enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 36°F in January while summers reach 76°F in July. The area gets 305 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 44.9 inches. The area receives 10.2 inches of snow annually. Air quality is rated Good with a median AQI of 35. The city sits at an elevation of 222 feet.

Temperature

36°F Jan (2°C) 76°F Jul (25°C)
Annual Average56.1°F
4% above US avg
January Average36°F (2°C)
July Average76°F (25°C)
Sunny Days305 days/yr

Geography

Elevation222 ft (68 m)
Area1.9 sq mi (4.9 km²)
Population Density4,448/sq mi
Coordinates37.6119°N, 77.5083°W
TimezoneAmerica/New_York
CountyRichmond city County
Nearest AirportRichmond International (RIC)
13 miles away

Precipitation & Snow

Annual Rainfall 44.9"
18% above US avg
Snowfall 10.2"
Wettest Month (Aug) 4.13"
Driest Month (Apr) 3.07"

Air Quality

AQI Median35.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score78.4 / 100
Social Vulnerability38.9 / 100
Community Resilience53.3 / 100

Hazard Breakdown

Tornado Relatively Moderate
Hurricane Relatively Low
Earthquake Relatively Moderate
Wildfire Very Low
Flood Relatively Moderate
Hail Relatively Low
Strong Wind Relatively Low
Heat Wave Relatively Moderate
Winter Weather Relatively Low
Lightning Relatively Moderate
Ice Storm Relatively Low
Drought No Rating
Cold Wave Relatively Low
Landslide Very Low
Coastal Flood Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

40 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.

Aug 23, 2011 11 km SSW of Mineral, Virginia M5.8 50 km 6 km
Aug 25, 2011 8 km SW of Mineral, Virginia M4.5 55 km 7 km
Aug 24, 2011 11 km SSW of Mineral, Virginia M4.2 52 km 0 km
Oct 21, 1998 13 km S of Dillwyn, Virginia M3.8 85 km 13 km
Mar 15, 1991 7 km NNW of Goochland, Virginia M3.8 38 km 16 km
May 5, 2003 Virginia M3.6 39 km 13 km
Aug 24, 2011 16 km NNW of Goochland, Virginia M3.4 45 km 0 km
Sep 1, 2011 7 km SSW of Mineral, Virginia M3.4 53 km 3 km
Sep 22, 2001 5 km E of Pantops, Virginia M3.2 91 km 0 km
May 22, 2014 15 km ENE of Cumberland, Virginia M3.1 50 km 10 km
Jan 30, 2012 9 km SSE of Louisa, Virginia M3.1 56 km 3 km
Oct 2, 2010 10 km NNW of Ashland, Virginia M3.0 27 km 19 km
Oct 12, 2011 9 km S of Louisa, Virginia M3.0 55 km 4 km
Mar 26, 2012 13 km S of Louisa, Virginia M3.0 53 km 9 km
May 6, 2025 8 km S of Dillwyn, Virginia M3.0 86 km 8 km
Aug 3, 1995 13 km N of Williamsburg, Virginia M2.9 76 km 1 km
Mar 15, 2015 6 km SW of Mineral, Virginia M2.8 55 km 5 km
Aug 23, 2011 9 km SSW of Mineral, Virginia M2.8 52 km 0 km
Apr 21, 1998 1 km NNW of Free Union, Virginia M2.8 112 km 2 km
Jan 14, 2025 1 km NNE of Wyndham, Virginia M2.8 14 km 0 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Hurricane History

11 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.

Year Name Category Max Wind Closest
2014 Arthur Category 2 98 mph 270 km
2011 Irene Category 1 75 mph 189 km
2003 Isabel Category 2 98 mph 103 km
1999 Floyd Category 1 81 mph 154 km
1998 Bonnie Category 1 86 mph 247 km
1996 Bertha Category 1 75 mph 291 km
1996 Fran Category 1 75 mph 289 km
1993 Emily Category 3 115 mph 298 km
1991 Bob Category 3 115 mph 294 km
1986 Charley Category 1 81 mph 182 km
1985 Gloria Category 2 104 mph 232 km
Source: NOAA IBTrACS (Category 1+, 1980–2026).

Tornado History

331 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 14 fatalities, 416 injuries.

Date Rating Distance Path Fatalities
Aug 6, 1993 EF4 46 km 1.0 mi 4
Feb 24, 2016 EF3 50 km 30.3 mi 0
Apr 16, 2011 EF3 88 km 46.9 mi 2
Apr 1, 1998 EF3 31 km 5.0 mi 2
Aug 6, 1993 EF3 82 km 2.9 mi 0
Oct 18, 1990 EF3 87 km 3.5 mi 0
Oct 18, 1990 EF3 36 km 5.0 mi 1
May 4, 1990 EF3 43 km 8.0 mi 0
Oct 14, 1986 EF3 60 km 5.0 mi 0
Oct 14, 1986 EF3 95 km 12.0 mi 0
May 8, 1984 EF3 39 km 5.0 mi 0
May 8, 1984 EF3 44 km 2.0 mi 0
May 22, 1983 EF3 72 km 3.5 mi 0
Apr 19, 1978 EF3 82 km 35.6 mi 0
Jul 9, 1977 EF3 45 km 5.9 mi 0
Nov 2, 1966 EF3 78 km 0.1 mi 0
Sep 30, 1959 EF3 75 km 6.5 mi 0
May 3, 2021 EF2 91 km 4.4 mi 0
Apr 19, 2019 EF2 50 km 2.0 mi 0
Apr 19, 2019 EF2 49 km 3.1 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

6 wildfires (100+ acres) recorded within 100 km. Largest: OLD STAGE ROAD (2,238 acres, 2008).

Year Name Acres Burned Distance
2008 OLD STAGE ROAD 2,238 69 km
2008 POCAHONTAS ROAD 1,146 89 km
2011 CHOPPING ROAD 889 58 km
2008 GOLD HILL 807 81 km
2017 VAGDR FY17 RX DGIF SUPPORT 674 84 km
2019 VAJRR-FY19-RX-FUEL REDUCTION 514 50 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 36°F (2°C) 3.5 in Coldest
February 40°F (4°C) 3.2 in
March 48°F (9°C) 3.8 in
April 57°F (14°C) 3.1 in Driest
May 66°F (19°C) 4.0 in
June 74°F (23°C) 3.5 in
July 76°F (25°C) 4.0 in Warmest
August 76°F (25°C) 4.1 in Wettest
September 70°F (21°C) 3.7 in
October 59°F (15°C) 3.7 in
November 49°F (10°C) 3.3 in
December 41°F (5°C) 3.3 in

Dumbarton has a seasonal temperature swing of 40°F / from 36°F in January to 76°F in July. Total annual precipitation is 43.0 inches, with August being the wettest month (4.1") and April the driest (3.1").

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