Mercer Weather Forecast

    • 39
    • 61

    Rain Showers Likely

    • 34
    • 58

    Mostly Sunny

    • 49
    • 62

    Rain Showers Likely

    • 44
    • 66

    Chance Rain Showers

Today 10 May Mercer

Partly cloudy this Morning, then clearing. Cool with Highs around 60. Northwest Winds 5 to 10 Mph.

Tonight 10 May Mercer

Partly cloudy. Lows around 40. North Winds 5 to 10 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mercer Temperature Statistics

May Temperature

New Castle, New Castle Municipal Airport (16.2 miles)

  • Lowest 1 May, 2026

    33.1 °F

  • Average May

    49.9 °F

  • Highest 4 May, 2026

    73 °F

Climate (2021–Present)

New Castle, New Castle Municipal Airport (16.2 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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