West Middlesex Weather Forecast

    • 49
    • 71

    Increasing Clouds

    • 62
    • 81

    Partly Sunny

    • 66
    • 84

    Rain Showers

    • 66
    • 85

    Rain Showers Likely

    • 61
    • 80

    Mostly Cloudy

    • 64
    • 83

    Chance Thunderstorms

    • 60
    • 80

    Chance Rain Showers

Today 14 Sep Mercer

Mostly sunny. Near steady temperature in the upper 60s. North Winds 5 to 10 Mph.

Tonight 14 Sep Mercer

Mainly clear. Lows in the upper 40s. Northeast Winds 5 to 10 Mph, becoming southeast after midnight.

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West Middlesex Temperature Statistics

September Temperature

New Castle, New Castle Municipal Airport (9.9 miles)

  • Lowest 6 September, 2026

    54 °F

  • Average September

    71.3 °F

  • Highest 2 September, 2026

    91.9 °F

Climate (2021–2026)

New Castle, New Castle Municipal Airport (9.9 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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