Irwin Weather Forecast

    • 34
    • 55

    Increasing Clouds

    • 22
    • 41

    Rain/Snow Likely

    • 21
    • 48

    Mostly Sunny

    • 19
    • 43

    Sunny

    • 30
    • 49

    Mostly Cloudy

    • 34
    • 57

    Partly Sunny

Today 17 Jan Southern Lancaster

Partly sunny. Highs in the mid 50s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 17 Jan Southern Lancaster

Mostly cloudy. A chance of rain in the Evening, then rain likely after midnight. Lows in the mid 30s. West Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Irwin Temperature Statistics

January Temperature

Lancaster County-mc Whirter Field (2.5 miles)

  • Lowest 12 January, 2026

    24.8 °F

  • Average January

    49.4 °F

  • Highest 10 January, 2026

    78.8 °F

Climate (2021–Present)

Lancaster County-mc Whirter Field (2.5 miles)

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  • Average Low 2021–2026

    51.9 °F

  • Average 2021–2026

    62.3 °F

  • Average High 2021–2026

    73.8 °F
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