Fairfax Weather Forecast
- 74
- 91
Mostly Sunny
- 75
- 87
Slight Chance Thunderstorms
- 74
- 86
Chance Thunderstorms
- 74
- 87
Thunderstorms Likely
- 74
- 84
Thunderstorms Likely
- 74
- 82
Thunderstorms Likely
Today 26 Aug South Central Duval
Sunny. Highs in the lower 90s. Northwest Winds around 5 Mph.
Tonight 26 Aug South Central Duval
Partly cloudy. Lows in the mid 70s. West Winds around 5 Mph.
Fairfax Temperature Statistics
August Temperature
Jacksonville Naval Air Station (3.7 miles)
Lowest 23 August, 2025
73.9 °FAverage August
84.7 °FHighest 1 August, 2025
98.7 °F
Climate (2020–Present)
Jacksonville Naval Air Station (3.7 miles)
Average Low 2020–2025
65.1 °FAverage 2020–2025
72.6 °FAverage High 2020–2025
81.1 °F