Decatur Weather Forecast

    • 27
    • 43

    Mostly Sunny

    • 41
    • 52

    Chance Rain Showers

    • 45
    • 53

    Rain Showers Likely

    • 35
    • 52

    Rain Showers Likely

    • 26
    • 41

    Rain/Freezing Rain

    • 21
    • 33

    Chance Rain/Freezing Rain

    • 13
    • 33

    Partly Sunny

Today 20 Jan DeKalb

Sunny. Highs in the lower 40s. Northwest Winds 5 to 10 Mph.

Tonight 20 Jan DeKalb

Mostly clear. Lows in the mid 20s. Light northwest Winds, becoming east after midnight.

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Decatur Temperature Statistics

January Temperature

Atlanta, De Kalb-Peachtree Airport (6.8 miles)

  • Lowest 16 January, 2026

    19 °F

  • Average January

    49.4 °F

  • Highest 7 January, 2026

    72 °F

Climate (2021–Present)

Atlanta, De Kalb-Peachtree Airport (6.8 miles)

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  • Average Low 2021–2026

    53 °F

  • Average 2021–2026

    63 °F

  • Average High 2021–2026

    73.5 °F
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