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

Annapolis, United States Naval Academy (KNAK)

Lat: 38.99°NLon: 76.49°WElev: 3ft.

Fair

77°F

25°C

Humidity 88%
Wind Speed Calm
Barometer 29.94 in (1014.1 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Aug 10:54 pm EDT
Extended Forecast for

Arnold MD

  • Tonight

    Tonight: Partly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 86. Light and variable wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Slight Chance
    T-storms then
    Showers

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 4am, then a slight chance of showers between 4am and 5am. Mostly cloudy, with a low around 68. Light north wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Showers
    Likely

  • Friday

    Friday: A slight chance of showers after 2pm. Partly sunny, with a high near 82. Northeast wind around 7 mph. Chance of precipitation is 20%.

    High: 82 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 69. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 69 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.

    High: 82 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

    Low: 70 °F

    Showers
    Likely then
    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 20%.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

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

    Low: 69 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 73. Calm wind.
Thursday
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 86. Light and variable wind becoming south 5 to 7 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms likely before 4am, then a slight chance of showers between 4am and 5am. Mostly cloudy, with a low around 68. Light north wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A slight chance of showers after 2pm. Partly sunny, with a high near 82. Northeast wind around 7 mph. Chance of precipitation is 20%.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 69. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Saturday
Showers likely before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 82. 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. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Sunday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Sunny, with a high near 82.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 69. Chance of precipitation is 20%.
Wednesday
A chance of showers. Mostly sunny, with a high near 84. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Arnold MD
 39.04°N 76.51°W (Elev. 98 ft)
Last Update:
10:52 pm EDT Aug 19, 2026
Forecast Valid:
11pm EDT Aug 19, 2026-6pm EDT Aug 26, 2026
 
Forecast Discussion
 
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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