Petersburg Weather Forecast

    • 70
    • 96

    Becoming Sunny

    • 72
    • 98

    Mostly Sunny

    • 68
    • 97

    Mostly Cloudy

    • 65
    • 87

    Rain Showers Likely

    • 60
    • 80

    Chance Rain Showers

    • 59
    • 78

    Slight Chance Thunderstorms

Today 17 Sep Howard

Mostly sunny. Hot with Highs in the mid 90s. South Winds around 5 Mph, becoming west this afternoon. Heat index Values up to 103.

Tonight 17 Sep Howard

Mostly clear. Lows in the lower 70s. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Petersburg Temperature Statistics

September Temperature

Jesse Viertel Memorial Airport (13.7 miles)

  • Lowest 14 September, 2026

    62.4 °F

  • Average September

    79.6 °F

  • Highest 8 September, 2026

    97.7 °F

Climate (2021–2026)

Jesse Viertel Memorial Airport (13.7 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    57.1 °F

  • Average High 2021–2026

    67.4 °F
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