Chambersburg Weather Forecast

    • 68
    • 93

    Chance Rain Showers

    • 69
    • 93

    Partly Sunny

    • 53
    • 90

    Rain Showers

    • 50
    • 69

    Chance Rain Showers

    • 52
    • 67

    Rain Showers

    • 57
    • 72

    Rain Showers Likely

Today 18 May Franklin

Sunny. A chance of Thunderstorms with a slight chance of Showers this afternoon. Some Thunderstorms may produce gusty Winds this afternoon. Hot with Highs in the lower 90s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 18 May Franklin

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms in the Evening, then partly cloudy after midnight. Some Thunderstorms may produce gusty Winds in the evening. Lows in the upper 60s. South Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Chambersburg Temperature Statistics

May Temperature

Hagerstown, Washington County Regional Airport (16.2 miles)

  • Lowest 3 May, 2026

    36.6 °F

  • Average May

    59.2 °F

  • Highest 5 May, 2026

    84.7 °F

Climate (2021–Present)

Hagerstown, Washington County Regional Airport (16.2 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    56.8 °F

  • Average High 2021–2026

    66 °F
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