Anna Weather Forecast

    • 17
    • 40

    Increasing Clouds

    • 8
    • 23

    Snow Showers Likely

    • 11
    • 15

    Snow/Sleet

    • 1
    • 17

    Slight Chance Snow Showers

    • 5
    • 19

    Mostly Sunny

    • 17
    • 30

    Mostly Cloudy

Today 22 Jan Union

Sunny. Highs around 40. Northeast Winds around 5 Mph.

Tonight 22 Jan Union

Mostly clear in the Evening, then becoming partly cloudy. Lows around 17. Northeast Winds around 5 Mph, increasing to north 10 to 15 Mph with Gusts up to 25 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Anna Temperature Statistics

January Temperature

Southern Illinois Airport (21.7 miles)

  • Lowest 20 January, 2026

    8.1 °F

  • Average January

    37.3 °F

  • Highest 8 January, 2026

    68 °F

Climate (2021–Present)

Southern Illinois Airport (21.7 miles)

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  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    68.8 °F
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