Gaithersburg Weather Forecast

    • 57
    • 95

    Thunderstorms Likely

    • 52
    • 65

    Rain Showers

    • 51
    • 63

    Rain Showers

    • 57
    • 66

    Rain Showers Likely

    • 60
    • 74

    Rain Showers Likely

    • 62
    • 77

    Chance Thunderstorms

Today 20 May Central and Southeast Montgomery

Sunny in the Morning, then partly sunny with Showers with a chance of Thunderstorms in the afternoon. Hot with Highs in the lower 90s. West Winds 5 to 10 Mph. Chance of rain 80 percent.

Tonight 20 May Central and Southeast Montgomery

Showers likely with a chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Lows in the upper 50s. North Winds 5 to 10 Mph. Chance of rain 70 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Gaithersburg Temperature Statistics

May Temperature

Gaithersburg - Montgomery County Airport (2.5 miles)

  • Lowest 1 May, 2026

    37.4 °F

  • Average May

    60.1 °F

  • Highest 17 May, 2026

    86 °F

Climate (2021–Present)

Gaithersburg - Montgomery County Airport (2.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    56.1 °F

  • Average High 2021–2026

    66 °F
Get WillyWeather+ to remove ads