Maryland · NWS LWX office

Gaithersburg, MD weather

It is 46°F and fog/mist at Gaithersburg - Montgomery County Airport as of Oct 28, 5:05 AM EDT. Overnight: Patchy Fog, low near 48°F, 1% chance of precipitation. Forecast from the National Weather Service, issued Oct 28, 4:52 AM EDT.

Updated Oct 28, 5:18 AM EDT (snapshot)

Current conditions

Temperature

46°F

Fog/Mist

Wind

Calm

Humidity 100% · dew point 46°F

Pressure · visibility

30.40 inHg

Visibility 3 mi

Observed at Gaithersburg - Montgomery County Airport (KGAI), Oct 28, 5:05 AM EDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Gaithersburg forecast zone right now.

Around the NWS LWX forecast area

No active alerts in zones served by the LWX office near Gaithersburg.

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. No alerts are active anywhere in Maryland.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Gaithersburg (local time)
TimeTempForecastPrecip. chanceWind
Wed 5 AM49°FPatchy Fog1%SE 1 mph
Wed 6 AM49°FPatchy Fog1%E 2 mph
Wed 7 AM48°FPatchy Fog1%E 2 mph
Wed 8 AM49°FPatchy Fog2%E 2 mph
Wed 9 AM52°FPatchy Fog2%E 2 mph
Wed 10 AM56°FPartly Sunny2%E 3 mph
Wed 11 AM60°FPartly Sunny2%SE 3 mph
Wed 12 PM62°FMostly Cloudy2%SE 5 mph
Wed 1 PM64°FPartly Sunny2%SE 5 mph
Wed 2 PM65°FMostly Cloudy1%SE 5 mph
Wed 3 PM66°FMostly Cloudy1%SE 5 mph
Wed 4 PM65°FMostly Cloudy1%SE 5 mph
Wed 5 PM65°FMostly Cloudy1%SE 5 mph
Wed 6 PM63°FMostly Cloudy1%SE 3 mph
Wed 7 PM59°FMostly Cloudy1%SE 3 mph
Wed 8 PM55°FMostly Cloudy1%SE 3 mph
Wed 9 PM53°FPartly Cloudy1%SE 2 mph
Wed 10 PM51°FPartly Cloudy1%SE 2 mph
Wed 11 PM50°FPatchy Fog1%SE 2 mph
Thu 12 AM49°FPatchy Fog1%SE 2 mph
Thu 1 AM49°FPatchy Fog1%SE 1 mph
Thu 2 AM49°FPatchy Fog1%SE 1 mph
Thu 3 AM49°FPatchy Fog1%SE 1 mph
Thu 4 AM48°FPatchy Fog1%S 1 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Gaithersburg can differ.

7-day forecast

Overnight

Low 48°F

Patchy fog. Partly cloudy, with a low around 48. Southeast wind around 1 mph.

Wednesday

High 66°F·Low 48°F

Patchy fog before 10am. Mostly cloudy, with a high near 66. East wind around 5 mph.

Wednesday Night: Patchy fog after 11pm. Partly cloudy, with a low around 48. Southeast wind 0 to 3 mph.

Thursday

High 71°F·Low 50°F

Patchy fog before 10am. Mostly sunny, with a high near 71. South wind 0 to 6 mph.

Thursday Night: Clear, with a low around 50. Southwest wind around 3 mph.

Friday

High 73°F·Low 44°F

Sunny, with a high near 73.

Friday Night: Mostly clear, with a low around 44.

Saturday

High 64°F·Low 47°F

Mostly sunny, with a high near 64.

Saturday Night: Mostly cloudy, with a low around 47.

Sunday

High 67°F·Low 51°F

Mostly cloudy, with a high near 67.

Sunday Night: A chance of rain showers after 1am. Mostly cloudy, with a low around 51. Chance of precipitation is 30%.

Monday

High 67°F·Low 52°F

A chance of rain showers. Mostly cloudy, with a high near 67. Chance of precipitation is 30%.

Monday Night: A chance of rain showers. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.

Tuesday

High 67°F

A chance of rain showers. Partly sunny, with a high near 67.

Nearby cities

Larger cities in the area

Other cities in Montgomery County

See every city we cover in Maryland, or check all active alerts.

About this forecast

Forecast office
Gaithersburg is served by the National Weather Service LWX forecast office, forecast zone MDZ504, county zone MDC031.
Location used
The Census Bureau's internal point for Gaithersburg (39.1486, -77.1951), in Montgomery County. Population: 70,686 (2024 estimate), number 3 of the 13 Maryland cities on this site.
Radar
Nearest NWS radar: KLWX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/39.1486,-77.1951 (forecast issued Oct 28, 4:52 AM EDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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