Potomac Weather Forecast
- 68
- 85
Partly Sunny
- 69
- 87
Partly Sunny
- 73
- 92
Mostly Sunny
- 76
- 97
Hot
- 75
- 95
Chance Thunderstorms
- 73
- 91
Chance Thunderstorms
Today 22 Jul Central and Southeast Montgomery
Sunny. Highs in the mid 80s. Northeast Winds around 5 Mph.
Tonight 22 Jul Central and Southeast Montgomery
Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 60s. East Winds around 5 Mph.
Potomac Temperature Statistics
July Temperature
Gaithersburg - Montgomery County Airport (10.6 miles)
Lowest 4 July, 2025
60.1 °FAverage July
78.3 °FHighest 8 July, 2025
95 °F
Climate (2020–Present)
Gaithersburg - Montgomery County Airport (10.6 miles)
Average Low 2020–2025
46.4 °FAverage 2020–2025
56.1 °FAverage High 2020–2025
65.9 °F