Potomac River - Four Mile Run Entrance Weather Forecast
- 73
- 88
Thunderstorms
- 74
- 87
Rain Showers Likely
- 71
- 92
Chance Thunderstorms
- 68
- 85
Partly Sunny
- 69
- 85
Slight Chance Thunderstorms
- 72
- 88
Chance Rain Showers
Today 18 Jul Arlington/Falls Church/Alexandria
Partly sunny. A chance of Showers and Thunderstorms in the afternoon. Highs in the upper 80s. North Winds around 5 Mph, becoming northwest in the afternoon. Chance of rain 40 percent.
Tonight 18 Jul Arlington/Falls Church/Alexandria
Partly cloudy. Lows in the mid 70s. Northwest Winds around 5 Mph.
Potomac River - Four Mile Run Entrance Temperature Statistics
July Temperature
Washington/Reagan National Airport, DC (0.6 miles)
Lowest 5 July, 2025
69.7 °FAverage July
81.3 °FHighest 8 July, 2025
95.6 °F
Climate (2020–Present)
Washington/Reagan National Airport, DC (0.6 miles)
Average Low 2020–2025
52.7 °FAverage 2020–2025
60.5 °FAverage High 2020–2025
69.2 °F