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

St Marys County Airport (K2W6)

Lat: 38.32°NLon: 76.55°WElev: 144ft.

Partly Cloudy

72°F

22°C

Humidity 90%
Wind Speed SE 5 mph
Barometer 30.09 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 19 Sep 10:55 pm EDT
Extended Forecast for

3 Miles NNE Port Republic MD

  • Overnight

    Overnight: Mostly cloudy, with a low around 69. Southeast wind around 8 mph.

    Low: 69 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 83. South wind 9 to 13 mph.

    High: 83 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South wind 5 to 7 mph becoming light and variable. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A chance of showers after 2pm. Mostly cloudy, with a high near 75. Northeast wind 11 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

    High: 75 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Cloudy, with a low around 66. Northeast wind 11 to 13 mph. Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 2pm. Cloudy, with a high near 72. Chance of precipitation is 50%.

    High: 72 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Cloudy, with a low around 63. Chance of precipitation is 40%.

    Low: 63 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 70. Breezy. Chance of precipitation is 40%.

    High: 70 °F

    Chance
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 63. Breezy. Chance of precipitation is 40%.

    Low: 63 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 69. Southeast wind around 8 mph.
Sunday
Mostly cloudy, with a high near 83. South wind 9 to 13 mph.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South wind 5 to 7 mph becoming light and variable. Chance of precipitation is 50%.
Monday
A chance of showers after 2pm. Mostly cloudy, with a high near 75. Northeast wind 11 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms. Cloudy, with a low around 66. Northeast wind 11 to 13 mph. Chance of precipitation is 40%.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Cloudy, with a high near 72. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Cloudy, with a low around 63. Chance of precipitation is 40%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 70. Breezy. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 63. Breezy. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly cloudy, with a high near 69. Breezy. Chance of precipitation is 40%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 60. Breezy. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 69. Chance of precipitation is 30%.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 60. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 71. Chance of precipitation is 20%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Port Republic MD
 38.52°N 76.52°W (Elev. 26 ft)
Last Update:
10:54 pm EDT Sep 19, 2026
Forecast Valid:
1am EDT Sep 20, 2026-6pm EDT Sep 26, 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