Petersburg Weather Forecast

    • 62
    • 77

    Mostly Cloudy

    • 61
    • 81

    Chance Thunderstorms

    • 56
    • 75

    Rain Showers Likely

    • 56
    • 76

    Chance Rain Showers

    • 52
    • 71

    Chance Rain Showers

    • 48
    • 64

    Chance Rain Showers

    • 47
    • 62

    Mostly Cloudy

Today 13 Sep Nelson

Mostly cloudy with a 20 percent chance of Showers. Highs in the mid 70s. East Winds around 10 Mph with higher Gusts.

Tonight 13 Sep Nelson

Cloudy. A slight chance of Showers and Thunderstorms after midnight. Lows in the mid 60s. East Winds 5 to 15 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Petersburg Temperature Statistics

September Temperature

Grand Forks Air Force Base (28 miles)

  • Lowest 7 September, 2025

    34.3 °F

  • Average September

    54.3 °F

  • Highest 10 September, 2025

    81.1 °F

Climate (2020–Present)

Grand Forks Air Force Base (28 miles)

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  • Average Low 2020–2025

    31.5 °F

  • Average 2020–2025

    42.3 °F

  • Average High 2020–2025

    52.4 °F
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