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Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

Frederick Municipal Airport (KFDK)

Lat: 39.42°NLon: 77.37°WElev: 269ft.

Mostly Cloudy

72°F

22°C

Humidity 80%
Wind Speed SW 6 mph
Barometer 29.67 in
Dewpoint 65°F (18°C)
Visibility 9.00 mi
Last update 18 Jun 6:15 am EDT
Extended Forecast for

Monrovia MD

  • Today

    Today: Scattered showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 91. Breezy, with a west wind 13 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 40%.

    High: 91 °F

    Breezy.
    Scattered
    Showers then
    Slight Chance
    T-storms

  • Tonight

    Tonight: A chance of showers, mainly after 5am. Mostly cloudy, with a low around 66. West wind 6 to 11 mph becoming light northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 30%.

    Low: 66 °F

    Partly Cloudy
    then Chance
    Showers

  • Juneteenth

    Juneteenth: Cloudy through mid morning, then gradual clearing, with a high near 82. Light northwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 82 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Mostly clear, with a low around 61. Northwest wind 5 to 9 mph becoming light west after midnight. Winds could gust as high as 20 mph.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82. West wind 7 to 14 mph, with gusts as high as 23 mph.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 50%.

    Low: 67 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: Showers likely, then showers and possibly a thunderstorm after 2pm. High near 83. Chance of precipitation is 80%.

    High: 83 °F

    Showers

Detailed Forecast

Today
Scattered showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 91. Breezy, with a west wind 13 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 40%.
Tonight
A chance of showers, mainly after 5am. Mostly cloudy, with a low around 66. West wind 6 to 11 mph becoming light northwest after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 30%.
Juneteenth
Cloudy through mid morning, then gradual clearing, with a high near 82. Light northwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Friday Night
Mostly clear, with a low around 61. Northwest wind 5 to 9 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Saturday
Sunny, with a high near 82. West wind 7 to 14 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
A chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 50%.
Monday
Showers likely, then showers and possibly a thunderstorm after 2pm. High near 83. Chance of precipitation is 80%.
Monday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 61. Chance of precipitation is 80%.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Monrovia MD
 39.36°N 77.26°W (Elev. 449 ft)
Last Update:
4:53 am EDT Jun 18, 2026
Forecast Valid:
6am EDT Jun 18, 2026-6pm EDT Jun 24, 2026
 
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