Caldwell Island Weather Forecast

    • 50
    • 61

    Chance Rain Showers

    • 46
    • 54

    Chance Rain Showers

    • 44
    • 51

    Mostly Cloudy

    • 44
    • 48

    Rain Showers Likely

    • 44
    • 47

    Rain Showers Likely

    • 45
    • 49

    Chance Rain Showers

Today 18 May Knox

Mostly cloudy. Areas of fog in the morning. A chance of Showers in the Morning, then a chance of Showers with a slight chance of Thunderstorms in the afternoon. Visibility one quarter mile or less at Times in the morning. Highs in the lower 60s. Light and variable Winds, becoming west around 10 Mph with Gusts up to 20 Mph in the afternoon. Chance of rain 50 percent.

Tonight 18 May Knox

Partly cloudy in the Evening, then becoming mostly cloudy. A 50 percent chance of Showers. Lows in the upper 40s. Light and variable Winds, becoming northwest around 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Caldwell Island Temperature Statistics

May Temperature

Rockland, Knox County Regional Airport (13 miles)

  • Lowest 13 May, 2025

    39.9 °F

  • Average May

    50.3 °F

  • Highest 15 May, 2025

    64.9 °F

Climate (2020–Present)

Rockland, Knox County Regional Airport (13 miles)

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  • Average Low 2020–2025

    40 °F

  • Average 2020–2025

    48 °F

  • Average High 2020–2025

    55.3 °F
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