Posey Weather Forecast

    • 25
    • 55

    Rain Showers

    • 31
    • 38

    Mostly Sunny

    • 26
    • 54

    Partly Sunny

    • 29
    • 43

    Mostly Cloudy

    • 41
    • 47

    Mostly Cloudy

    • 43
    • 58

    Mostly Cloudy

Today 18 Dec Clinton

Showers with isolated Thunderstorms. Highs in the mid 50s. Temperature falling into the mid 40s in the afternoon. South Winds around 20 Mph, becoming west in the afternoon. Gusts up to 40 Mph. Chance of rain near 100 percent.

Tonight 18 Dec Clinton

Cloudy with a chance of rain with a slight chance of very light drizzle. Not as cool. Near steady temperature in the lower 50s. Temperature rising into the lower 50s. South Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 30 percent.

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Posey Temperature Statistics

December Temperature

Centralia Municipal Airport (14.3 miles)

  • Lowest 9 December, 2025

    38.7 °F

  • Average December

    40.7 °F

  • Highest 9 December, 2025

    44.1 °F

Climate (2020–Present)

Centralia Municipal Airport (14.3 miles)

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  • Average Low 2020–2025

    48.4 °F

  • Average 2020–2025

    58.2 °F

  • Average High 2020–2025

    68.3 °F
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