Mercer Weather Forecast

    • 64
    • 84

    Chance Thunderstorms

    • 65
    • 85

    Chance Thunderstorms

    • 66
    • 84

    Rain Showers

    • 63
    • 82

    Rain Showers

    • 61
    • 81

    Rain Showers Likely

    • 58
    • 80

    Chance Thunderstorms

Today 8 Aug Mercer

Partly cloudy with a chance of Showers and Thunderstorms. Highs in the mid 80s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 40 percent.

Tonight 8 Aug Mercer

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then mainly clear after midnight. Humid with Lows in the mid 60s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Real-Time

Mercer Temperature Statistics

August Temperature

New Castle, New Castle Municipal Airport (16.2 miles)

  • Lowest 4 August, 2026

    52 °F

  • Average August

    71.7 °F

  • Highest 5 August, 2026

    87.1 °F

Climate (2021–2026)

New Castle, New Castle Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    41.7 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    61.1 °F
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