Petersburg Weather Forecast

    • 28
    • 40

    Slight Chance Snow

    • 17
    • 31

    Chance Snow

    • 24
    • 28

    Partly Sunny

    • 31
    • 42

    Mostly Cloudy

    • 26
    • 46

    Chance Rain

    • 16
    • 30

    Mostly Cloudy

    • 22
    • 29

    Mostly Cloudy

Today 9 Jan Delaware

Mostly sunny and cooler. Near steady temperature in the upper 30s. Northwest Winds 5 to 10 Mph.

Tonight 9 Jan Delaware

Mostly cloudy. A slight chance of snow after midnight. Lows in the upper 20s. North Winds around 5 Mph, becoming west around 5 Mph after midnight. Chance of snow 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Petersburg Temperature Statistics

January Temperature

Monticello Regional Airport (23 miles)

  • Lowest 1 January, 2026

    12.2 °F

  • Average January

    28 °F

  • Highest 7 January, 2026

    46.4 °F

Climate (2021–Present)

Monticello Regional Airport (23 miles)

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  • Average Low 2021–2026

    37.7 °F

  • Average 2021–2026

    48.5 °F

  • Average High 2021–2026

    58.7 °F
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