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

St Marys County Airport (K2W6)

Lat: 38.32°NLon: 76.55°WElev: 144ft.

Light Rain

77°F

25°C

Humidity 95%
Wind Speed W 8 mph
Barometer 29.90 in
Dewpoint 76°F (24°C)
Visibility 8.00 mi
Heat Index78°F (26°C)
Last update 18 Aug 4:35 pm EDT
Extended Forecast for

Barstow MD

  • This Afternoon

    This Afternoon: A slight chance of showers. Mostly cloudy, with a high near 86. Northeast wind around 5 mph. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy during the early evening, then becoming clear, with a low around 69. Calm wind.

    Low: 69 °F

    Clear

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 88. Light west wind.

    High: 88 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms after 2am. Mostly clear, with a low around 72. Light south wind. Chance of precipitation is 20%.

    Low: 72 °F

    Clear then
    Slight Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 87. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 70%.

    High: 87 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.

    Low: 69 °F

    Showers
    Likely

  • Friday

    Friday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
A slight chance of showers. Mostly cloudy, with a high near 86. Northeast wind around 5 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy during the early evening, then becoming clear, with a low around 69. Calm wind.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 88. Light west wind.
Wednesday Night
A slight chance of showers and thunderstorms after 2am. Mostly clear, with a low around 72. Light south wind. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 87. Calm wind becoming northeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Friday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Monday
Sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 67.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 85.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Barstow MD
 38.53°N 76.6°W (Elev. 148 ft)
Last Update:
2:22 pm EDT Aug 18, 2026
Forecast Valid:
4pm EDT Aug 18, 2026-6pm EDT Aug 25, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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