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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fog/Mist

72°F

22°C

Humidity 96%
Wind Speed Calm
Barometer 29.90 in (1012.7 mb)
Dewpoint 71°F (22°C)
Visibility 4.00 mi
Last update 18 Aug 2:55 am EDT
Extended Forecast for

Franconia VA

  • Overnight

    Overnight: Mostly cloudy, with a low around 72. Northwest wind around 5 mph.

    Low: 72 °F

    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers before 1pm, then a slight chance of showers after 2pm. Mostly cloudy, with a high near 77. Northeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.

    High: 77 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers after 2am. Patchy fog after 5am. Otherwise, cloudy, with a low around 68. Northeast wind 6 to 8 mph. Chance of precipitation is 20%.

    Low: 68 °F

    Cloudy then
    Slight Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of showers, mainly between 8am and 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 75. Northeast wind around 7 mph. Chance of precipitation is 30%.

    High: 75 °F

    Chance
    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 67. East wind 3 to 6 mph.

    Low: 67 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 20%.

    High: 82 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 72. Northwest wind around 5 mph.
Monday
A slight chance of showers before 1pm, then a slight chance of showers after 2pm. Mostly cloudy, with a high near 77. Northeast wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Monday Night
A slight chance of showers after 2am. Patchy fog after 5am. Otherwise, cloudy, with a low around 68. Northeast wind 6 to 8 mph. Chance of precipitation is 20%.
Tuesday
A chance of showers, mainly between 8am and 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 75. Northeast wind around 7 mph. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 67. East wind 3 to 6 mph.
Wednesday
A slight chance of showers after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Partly cloudy, with a low around 67.
Friday
Mostly sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 68.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
A chance of showers. Partly sunny, with a high near 86. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Franconia VA
 38.77°N 77.16°W (Elev. 197 ft)
Last Update:
1:30 am EDT Aug 18, 2025
Forecast Valid:
3am EDT Aug 18, 2025-6pm EDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation