Petersburg Weather Forecast

    • 65
    • 69

    Rain Showers

    • 55
    • 74

    Rain Showers Likely

    • 61
    • 69

    Rain Showers

    • 61
    • 75

    Rain Showers Likely

    • 62
    • 76

    Rain Showers

    • 58
    • 75

    Chance Rain Showers

Today 14 Sep Delaware

Partly sunny this Morning, then mostly cloudy with a chance of Showers this afternoon. Highs around 70. Southeast Winds 15 to 20 Mph. Gusts up to 35 Mph this afternoon. Chance of rain 50 percent.

Tonight 14 Sep Delaware

A chance of Thunderstorms. A chance of Showers in the Evening, then Showers after midnight. Locally heavy rainfall possible after midnight. Warmer. Near steady temperature in the upper 60s. South Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

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Petersburg Temperature Statistics

September Temperature

Monticello Regional Airport (23 miles)

  • Lowest 11 September, 2026

    53.6 °F

  • Average September

    74.6 °F

  • Highest 1 September, 2026

    93.2 °F

Climate (2021–2026)

Monticello Regional Airport (23 miles)

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  • Average Low 2021–2026

    37.4 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    58.5 °F
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