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

Severe Weather Across the Center of the Nation; Fire Weather Concerns for Southwest and California; Snow for the Central Rockies

Severe thunderstorms will continue to impact the center of the Nation through today. Very large hail, strong tornadoes, and damaging winds are expected from the Great Lakes into the central/southern Plains; Flash flooding is possible for portions into the mid-Mississippi Valley. Critical fire weather conditions for the Southwest and central valley of California today. Winter hangs on for Rockies. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

91°F

33°C

Humidity 39%
Wind Speed Calm
Barometer 30.18 in (1022.9 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 18 May 12:56 pm EDT
Extended Forecast for

2 Miles NNW Colesville MD

  • This Afternoon

    This Afternoon: Sunny, with a high near 93. South wind 5 to 7 mph.

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 70. South wind 6 to 8 mph.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 95. Southwest wind 6 to 9 mph.

    High: 95 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 72. Southwest wind around 8 mph, with gusts as high as 18 mph.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm after 2pm. High near 93. West wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.

    High: 93 °F

    Sunny then
    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 57. Chance of precipitation is 80%.

    Low: 57 °F

    Showers

  • Thursday

    Thursday: Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.

    High: 68 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 40%.

    Low: 52 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.

    High: 64 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 93. South wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 70. South wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 95. Southwest wind 6 to 9 mph.
Tuesday Night
Partly cloudy, with a low around 72. Southwest wind around 8 mph, with gusts as high as 18 mph.
Wednesday
Showers and possibly a thunderstorm after 2pm. High near 93. West wind 5 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 57. Chance of precipitation is 80%.
Thursday
Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 40%.
Friday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Friday Night
Showers likely. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.
Saturday
A chance of showers. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.
Saturday Night
Showers likely. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Sunday
A chance of showers. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Colesville MD
 39.11°N 77.02°W (Elev. 436 ft)
Last Update:
10:53 am EDT May 18, 2026
Forecast Valid:
1pm EDT May 18, 2026-6pm EDT May 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