Fairfield Weather Forecast

    • 62
    • 83

    Chance Thunderstorms

    • 58
    • 81

    Chance Thunderstorms

    • 63
    • 82

    Chance Rain Showers

    • 62
    • 80

    Chance Rain Showers

    • 58
    • 81

    Chance Thunderstorms

    • 55
    • 78

    Mostly Sunny

Today 18 Sep Jefferson

Mostly cloudy with a slight chance of Thunderstorms. Showers likely late this Morning, then a chance of Showers this afternoon. Highs in the lower 80s. South Winds around 5 Mph. Chance of rain 60 percent.

Tonight 18 Sep Jefferson

Showers likely with a chance of Thunderstorms. Humid with Lows in the lower 60s. Southwest Winds around 5 Mph, becoming southeast after midnight. Chance of rain 70 percent.

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Fairfield Temperature Statistics

September Temperature

Fairfield Municipal Airport (3.1 miles)

  • Lowest 7 September, 2025

    39.2 °F

  • Average September

    67.2 °F

  • Highest 13 September, 2025

    96.8 °F

Climate (2020–Present)

Fairfield Municipal Airport (3.1 miles)

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  • Average Low 2020–2025

    41.4 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    61.6 °F
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