Merrill Weather Forecast

    • 47
    • 77

    Increasing Clouds

    • 46
    • 70

    Chance Rain Showers

    • 43
    • 64

    Rain Showers Likely

    • 44
    • 68

    Chance Rain Showers

    • 44
    • 71

    Slight Chance Rain Showers

    • 46
    • 74

    Partly Sunny

Today 7 Sep Klamath Basin

Areas of smoke in the morning. Partly cloudy with a 10 percent chance of Thunderstorms. Highs in the lower to mid 70s. South Winds 5 to 10 Mph shifting to the southwest in the afternoon.

Tonight 7 Sep Klamath Basin

Mostly cloudy. A 10 percent chance of Thunderstorms in the evening. Lows in the lower 40s to lower 50s. West Winds 5 to 10 Mph shifting to the southeast well after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Merrill Temperature Statistics

September Temperature

Klamath Falls International Airport (10.6 miles)

  • Lowest 1 September, 2025

    44.1 °F

  • Average September

    68.3 °F

  • Highest 2 September, 2025

    89.1 °F

Climate (2020–Present)

Klamath Falls International Airport (10.6 miles)

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  • Average Low 2020–2025

    33.8 °F

  • Average 2020–2025

    48.6 °F

  • Average High 2020–2025

    63.2 °F
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