Fairfield Weather Forecast

    • 72
    • 93

    Slight Chance Thunderstorms

    • 70
    • 88

    Rain Showers

    • 66
    • 83

    Rain Showers

    • 68
    • 81

    Chance Thunderstorms

    • 70
    • 88

    Chance Thunderstorms

    • 65
    • 83

    Slight Chance Thunderstorms

Today 11 Aug Jefferson

Mostly sunny with a slight chance of Showers and Thunderstorms. Hot with Highs in the lower 90s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 106.

Tonight 11 Aug Jefferson

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Humid with Lows in the lower 70s. South Winds around 5 Mph, becoming east after midnight. Chance of rain 20 percent. Heat index Values up to 103 early in the evening.

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Fairfield Temperature Statistics

August Temperature

Fairfield Municipal Airport (3.1 miles)

  • Lowest 3 August, 2026

    60.8 °F

  • Average August

    73 °F

  • Highest 4 August, 2026

    87.8 °F

Climate (2021–2026)

Fairfield Municipal Airport (3.1 miles)

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  • Average Low 2021–2026

    41.4 °F

  • Average 2021–2026

    51.6 °F

  • Average High 2021–2026

    62 °F
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