Current conditions at
Gaithersburg - Montgomery County Airport (KGAI)
Lat: 39.17°NLon: 77.17°WElev: 495ft.
Mostly Cloudy
66°F
19°C
| Humidity | 100% |
| Wind Speed | Calm |
| Barometer | 30.07 in (1019.4 mb) |
| Dewpoint | 66°F (19°C) |
| Visibility | 10.00 mi |
| Last update | 21 Aug 11:56 pm EDT |
Extended Forecast for
Lisbon MDSimilar City Names
Overnight
Low: 63 °F
Chance
Showers and
Patchy FogSaturday
High: 77 °F
Showers
LikelySaturday Night
Low: 65 °F
Chance
T-storms then
Chance
ShowersSunday
High: 81 °F
Decreasing
CloudsSunday Night
Low: 59 °F
Mostly Clear
Monday
High: 79 °F
Mostly Sunny
Monday Night
Low: 58 °F
Mostly Clear
Tuesday
High: 80 °F
Sunny
Tuesday Night
Low: 62 °F
Mostly Clear
Detailed Forecast
Overnight
A chance of showers after 4am. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 30%.
Saturday
Showers likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Cloudy, with a high near 77. Calm wind becoming southeast around 6 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Light and variable wind. Chance of precipitation is 40%.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 81. West wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 59. West wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 58.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Additional Forecasts and Information
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Point Forecast:
Lisbon MDSimilar City Names
39.34°N 77.06°W (Elev. 551 ft)
39.34°N 77.06°W (Elev. 551 ft)
10:53 pm EDT Aug 21, 2026
12am EDT Aug 22, 2026-6pm EDT Aug 28, 2026
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