Mercer Weather Forecast

    • 68
    • 84

    Rain Showers

    • 62
    • 81

    Chance Thunderstorms

    • 62
    • 82

    Mostly Sunny

    • 59
    • 81

    Chance Thunderstorms

    • 62
    • 83

    Partly Sunny

    • 67
    • 86

    Partly Sunny

    • 69
    • 88

    Chance Thunderstorms

Today 30 Jun Mercer

Showers and Thunderstorms. Some Thunderstorms may produce heavy rainfall. Highs in the mid 80s. South Winds 5 to 10 Mph. Chance of rain 90 percent.

Tonight 30 Jun Mercer

Showers with Thunderstorms likely this Evening, then a chance of Showers and Thunderstorms after midnight. Some Thunderstorms may produce heavy rainfall this evening. Humid with Lows in the upper 60s. Southwest Winds 5 to 10 Mph. Chance of rain 90 percent.

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Mercer Temperature Statistics

June Temperature

New Castle, New Castle Municipal Airport (16.2 miles)

  • Lowest 2 June, 2025

    36 °F

  • Average June

    70.6 °F

  • Highest 24 June, 2025

    93.9 °F

Climate (2020–Present)

New Castle, New Castle Municipal Airport (16.2 miles)

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  • Average Low 2020–2025

    42 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    61.1 °F
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