Irwin Weather Forecast

    • 71
    • 90

    Chance Thunderstorms

    • 71
    • 91

    Mostly Sunny

    • 73
    • 91

    Chance Thunderstorms

    • 74
    • 94

    Slight Chance Thunderstorms

    • 75
    • 96

    Slight Chance Thunderstorms

    • 74
    • 98

    Chance Thunderstorms

Today 22 Jul Southern Lancaster

Mostly sunny. A chance of Showers and Thunderstorms this afternoon. Highs around 90. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 22 Jul Southern Lancaster

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the lower 70s. East Winds around 5 Mph. Chance of rain 50 percent.

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Irwin Temperature Statistics

July Temperature

Lancaster County-mc Whirter Field (2.5 miles)

  • Lowest 3 July, 2025

    68 °F

  • Average July

    81.3 °F

  • Highest 8 July, 2025

    98.6 °F

Climate (2020–Present)

Lancaster County-mc Whirter Field (2.5 miles)

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  • Average Low 2020–2025

    52 °F

  • Average 2020–2025

    62.3 °F

  • Average High 2020–2025

    73.8 °F
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