Potomac Weather Forecast
- 67
- 86
Decreasing Clouds
- 67
- 85
Mostly Sunny
- 69
- 87
Mostly Sunny
- 73
- 91
Mostly Sunny
- 77
- 97
Slight Chance Thunderstorms
- 75
- 96
Chance Thunderstorms
Today 21 Jul Arlington/Falls Church/Alexandria
Mostly sunny. Highs in the mid 80s. North Winds around 5 Mph.
Tonight 21 Jul Arlington/Falls Church/Alexandria
Mostly clear. Lows in the upper 60s. Northeast Winds around 5 Mph.
Potomac Temperature Statistics
July Temperature
Washington/Reagan National Airport, DC (1.9 miles)
Lowest 5 July, 2025
69.7 °FAverage July
81.8 °FHighest 8 July, 2025
95.6 °F
Climate (2020–Present)
Washington/Reagan National Airport, DC (1.9 miles)
Average Low 2020–2025
52.7 °FAverage 2020–2025
60.5 °FAverage High 2020–2025
69.2 °F