South Run Stream Valley Park Weather Forecast
- 68
- 77
Chance Rain Showers
- 67
- 74
Chance Rain Showers
- 68
- 81
Slight Chance Thunderstorms
- 64
- 82
Partly Sunny
- 67
- 85
Mostly Sunny
- 69
- 86
Slight Chance Rain Showers
- 66
- 86
Chance Rain Showers
Today 18 Aug Fairfax
Cloudy with a 20 percent chance of Showers. Highs in the upper 70s. Northeast Winds around 10 Mph.
Tonight 18 Aug Fairfax
Mostly cloudy with scattered Showers. Lows in the upper 60s. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.
South Run Stream Valley Park Temperature Statistics
August Temperature
Fort Belvoir (3.1 miles)
Lowest 10 August, 2025
58.1 °FAverage August
74.7 °FHighest 14 August, 2025
92.5 °F
Climate (2020–Present)
Fort Belvoir (3.1 miles)
Average Low 2020–2025
47.9 °FAverage 2020–2025
58.1 °FAverage High 2020–2025
68.4 °F