West Middlesex Weather Forecast

    • 54
    • 79

    Mostly Sunny

    • 65
    • 84

    Partly Sunny

    • 68
    • 86

    Rain Showers

    • 56
    • 78

    Chance Thunderstorms

    • 55
    • 76

    Partly Sunny

    • 62
    • 82

    Slight Chance Thunderstorms

Today 7 Sep Mercer

Mostly sunny. Near steady temperature in the upper 70s. Northeast Winds around 5 Mph.

Tonight 7 Sep Mercer

Mainly clear. Lows in the mid 50s. East Winds around 5 Mph.

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West Middlesex Temperature Statistics

September Temperature

New Castle, New Castle Municipal Airport (9.9 miles)

  • Lowest 5 September, 2026

    57 °F

  • Average September

    74.9 °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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