Petersburg Weather Forecast

    • 66
    • 86

    Rain Showers

    • 62
    • 79

    Rain Showers Likely

    • 59
    • 77

    Slight Chance Thunderstorms

    • 59
    • 81

    Mostly Sunny

    • 63
    • 84

    Mostly Cloudy

    • 63
    • 84

    Chance Rain Showers

Today 27 Jul Mahoning

Patchy fog in the morning. Mostly cloudy with a slight chance of Showers in the Morning, then partly sunny with a chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the upper 80s. Southwest Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 27 Jul Mahoning

Partly cloudy. Patchy fog. Near steady temperature in the mid 60s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Petersburg Temperature Statistics

July Temperature

New Castle, New Castle Municipal Airport (9.3 miles)

  • Lowest 23 July, 2026

    48 °F

  • Average July

    73.4 °F

  • Highest 1 July, 2026

    95 °F

Climate (2021–2026)

New Castle, New Castle Municipal Airport (9.3 miles)

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  • Average Low 2021–2026

    41.7 °F

  • Average 2021–2026

    51.3 °F

  • Average High 2021–2026

    61.1 °F
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