National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

81°F

27°C

Humidity 56%
Wind Speed E 3 mph
Barometer 30.04 in (1017.5 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 19 Sep 3:55 pm EDT
Extended Forecast for

Accokeek MDSimilar City Names

  • Tonight

    Tonight: Mostly cloudy, with a low around 70. Southeast wind around 7 mph.

    Low: 70 °F

    Mostly Cloudy

  • Sunday

    Sunday: Scattered showers and thunderstorms after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 84. South wind 7 to 11 mph. Chance of precipitation is 40%.

    High: 84 °F

    Mostly Cloudy
    then
    Scattered
    Showers

  • Sunday Night

    Sunday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 68. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 68 °F

    Scattered
    Showers

  • Monday

    Monday: A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 74. Northeast wind 8 to 10 mph. Chance of precipitation is 30%.

    High: 74 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Cloudy, with a low around 65. Northeast wind around 8 mph. Chance of precipitation is 50%.

    Low: 65 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 2pm. Cloudy, with a high near 69. Chance of precipitation is 50%.

    High: 69 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Cloudy, with a low around 58. Chance of precipitation is 50%.

    Low: 58 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 67. Chance of precipitation is 40%.

    High: 67 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.

    Low: 57 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 70. Southeast wind around 7 mph.
Sunday
Scattered showers and thunderstorms after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 84. South wind 7 to 11 mph. Chance of precipitation is 40%.
Sunday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 68. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Monday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 74. Northeast wind 8 to 10 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms. Cloudy, with a low around 65. Northeast wind around 8 mph. Chance of precipitation is 50%.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Cloudy, with a high near 69. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Cloudy, with a low around 58. Chance of precipitation is 50%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 67. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly cloudy, with a high near 67. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.
Friday
A slight chance of showers. Partly sunny, with a high near 69. Chance of precipitation is 20%.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 54. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 72. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Accokeek MDSimilar City Names
 38.68°N 77°W (Elev. 62 ft)
Last Update:
2:23 pm EDT Sep 19, 2026
Forecast Valid:
4pm EDT Sep 19, 2026-6pm EDT Sep 26, 2026
 
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Additional Resources

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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