Petersburg Weather Forecast

    • 68
    • 86

    Partly Sunny

    • 67
    • 85

    Rain Showers Likely

    • 66
    • 81

    Chance Rain Showers

    • 67
    • 84

    Slight Chance Thunderstorms

    • 69
    • 86

    Slight Chance Thunderstorms

    • 72
    • 88

    Slight Chance Thunderstorms

    • 73
    • 91

    Slight Chance Thunderstorms

Today 4 Aug Menard

Mostly sunny. Near steady temperature in the mid 80s. South Winds around 5 Mph.

Tonight 4 Aug Menard

Mostly clear this Evening, then becoming partly cloudy. Lows in the upper 60s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Petersburg Temperature Statistics

August Temperature

Springfield - Abraham Lincoln Capital Airport (14.3 miles)

  • Lowest 2 August, 2026

    64.9 °F

  • Average August

    71.1 °F

  • Highest 2 August, 2026

    80.1 °F

Climate (2021–2026)

Springfield - Abraham Lincoln Capital Airport (14.3 miles)

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  • Average Low 2021–2026

    45 °F

  • Average 2021–2026

    55.5 °F

  • Average High 2021–2026

    65.6 °F
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