Gaithersburg Weather Forecast
- 55
- 77
Decreasing Clouds
- 61
- 81
Partly Sunny
- 63
- 85
Chance Thunderstorms
- 65
- 85
Partly Sunny
- 56
- 82
Chance Rain Showers
- 53
- 75
Mostly Sunny
Today 2 Sep Central and Southeast Montgomery
Mostly sunny. Highs in the upper 70s. Northeast Winds around 5 Mph.
Tonight 2 Sep Central and Southeast Montgomery
Partly cloudy in the Evening, then becoming mostly clear. Lows in the mid 50s. East Winds around 5 Mph in the Evening, becoming light and variable.
Gaithersburg Temperature Statistics
September Temperature
Gaithersburg - Montgomery County Airport (2.5 miles)
Lowest
–Average September
–Highest
–
Climate (2020–Present)
Gaithersburg - Montgomery County Airport (2.5 miles)
Average Low 2020–2025
46.4 °FAverage 2020–2025
56.1 °FAverage High 2020–2025
65.9 °F