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Weather & Climate in Idylwood, VA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Idylwood experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 33°F in January while summers reach 75°F in July. The area gets 293 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 43.6 inches. The area receives 18.5 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 35. The city sits at an elevation of 440 feet.
Temperature
33°F Jan (0°C)
75°F Jul (24°C)
| Annual Average | 54.0°F |
| 0% below US avg | |
| January Average | 33°F (0°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 440 ft (134 m) |
| Area | 2.8 sq mi (7.3 km²) |
| Population Density | 6,239/sq mi |
| Coordinates | 38.8892°N, 77.2040°W |
| Timezone | America/New_York |
| County | Falls Church city County |
| Nearest Airport | Ronald Reagan Washington Ntl (DCA) 9 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 35.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 1.6 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 98.3 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | No Rating |
| Cold Wave | Very Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
44 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 | 126 km | 6 km |
| Aug 25, 2011 | 8 km SW of Mineral, Virginia | M4.5 | 124 km | 7 km |
| Aug 24, 2011 | 11 km SSW of Mineral, Virginia | M4.2 | 127 km | 0 km |
| Mar 15, 1991 | 7 km NNW of Goochland, Virginia | M3.8 | 141 km | 16 km |
| Jul 16, 2010 | 5 km NNW of Barnesville, Maryland | M3.6 | 45 km | 7 km |
| Aug 24, 2011 | 16 km NNW of Goochland, Virginia | M3.4 | 135 km | 0 km |
| Sep 1, 2011 | 7 km SSW of Mineral, Virginia | M3.4 | 122 km | 3 km |
| Sep 22, 2001 | 5 km E of Pantops, Virginia | M3.2 | 141 km | 0 km |
| Jan 30, 2012 | 9 km SSE of Louisa, Virginia | M3.1 | 125 km | 3 km |
| Jun 3, 2010 | 4 km ENE of Franklintown, Pennsylvania | M3.1 | 135 km | 2 km |
| Jan 17, 2016 | 3 km NE of Ranson, West Virginia | M3.0 | 72 km | 5 km |
| Oct 12, 2011 | 9 km S of Louisa, Virginia | M3.0 | 126 km | 4 km |
| Oct 2, 2010 | 10 km NNW of Ashland, Virginia | M3.0 | 118 km | 19 km |
| Mar 26, 2012 | 13 km S of Louisa, Virginia | M3.0 | 129 km | 9 km |
| Apr 24, 2009 | 1 km S of Franklintown, Pennsylvania | M2.9 | 132 km | 1 km |
| Sep 15, 2019 | 5 km ESE of East Berlin, Pennsylvania | M2.8 | 118 km | 5 km |
| Aug 23, 2011 | 9 km SSW of Mineral, Virginia | M2.8 | 124 km | 0 km |
| Mar 15, 2015 | 6 km SW of Mineral, Virginia | M2.8 | 122 km | 5 km |
| Apr 21, 1998 | 1 km NNW of Free Union, Virginia | M2.8 | 143 km | 2 km |
| Jan 14, 2025 | 1 km NNE of Wyndham, Virginia | M2.8 | 136 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
5 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2011 | Irene | Category 1 | 75 mph | 211 km |
| 2003 | Isabel | Category 1 | 75 mph | 247 km |
| 1999 | Floyd | Category 1 | — | 252 km |
| 1986 | Charley | Category 1 | 81 mph | 241 km |
| 1985 | Gloria | Category 2 | 98 mph | 241 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
480 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 9 fatalities, 371 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 28, 2002 | EF4 | 38 km | 38.0 mi | 3 |
| Sep 24, 2001 | EF4 | 76 km | 10.0 mi | 0 |
| Sep 17, 2004 | EF3 | 66 km | 9.0 mi | 0 |
| Apr 28, 2002 | EF3 | 94 km | 18.0 mi | 0 |
| Sep 24, 2001 | EF3 | 20 km | 17.5 mi | 2 |
| Jul 19, 1996 | EF3 | 71 km | 2.2 mi | 0 |
| Oct 18, 1990 | EF3 | 93 km | 3.5 mi | 0 |
| May 22, 1983 | EF3 | 90 km | 2.0 mi | 0 |
| Sep 5, 1979 | EF3 | 16 km | 17.9 mi | 1 |
| Jan 26, 1978 | EF3 | 44 km | 0.7 mi | 1 |
| Apr 1, 1973 | EF3 | 15 km | 9.8 mi | 0 |
| Jun 9, 1961 | EF3 | 61 km | 0.1 mi | 0 |
| Sep 1, 2021 | EF2 | 53 km | 11.4 mi | 0 |
| Nov 2, 2018 | EF2 | 51 km | 5.5 mi | 0 |
| Jul 23, 2017 | EF2 | 75 km | 2.4 mi | 0 |
| May 8, 2008 | EF2 | 65 km | 3.4 mi | 0 |
| Sep 17, 2004 | EF2 | 20 km | 15.0 mi | 0 |
| Sep 17, 2004 | EF2 | 35 km | 4.0 mi | 0 |
| Sep 17, 2004 | EF2 | 58 km | 8.0 mi | 0 |
| Sep 17, 2004 | EF2 | 52 km | 13.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
5 wildfires (100+ acres) recorded within 100 km. Largest: SMITH RUN FIRE (1,908 acres, 2011).
| Year | Name | Acres Burned | Distance |
| 2011 | SMITH RUN FIRE | 1,908 | 85 km |
| 2012 | POINT 2 | 1,126 | 99 km |
| 2024 | ROCKY BRANCH | 1,018 | 100 km |
| 1999 | NCO | 816 | 41 km |
| 1984 | UNNAMED | 696 | 98 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (0°C) | 3.0 in | Coldest |
| February | 36°F (2°C) | 2.7 in | Driest |
| March | 45°F (7°C) | 3.5 in | |
| April | 55°F (13°C) | 3.2 in | |
| May | 64°F (18°C) | 4.1 in | Wettest |
| June | 72°F (22°C) | 3.6 in | |
| July | 75°F (24°C) | 3.7 in | Warmest |
| August | 75°F (24°C) | 3.7 in | |
| September | 69°F (20°C) | 3.7 in | |
| October | 57°F (14°C) | 3.2 in | |
| November | 47°F (8°C) | 3.4 in | |
| December | 38°F (3°C) | 3.2 in |
Idylwood has a seasonal temperature swing of 42°F / from 33°F in January to 75°F in July. Total annual precipitation is 40.8 inches, with May being the wettest month (4.1") and February the driest (2.7").