Gertson Slough Weather Forecast

    • 55
    • 66

    Rain Showers

    • 52
    • 64

    Mostly Cloudy

    • 50
    • 64

    Rain Showers Likely

    • 48
    • 60

    Chance Rain Showers

    • 50
    • 65

    Mostly Cloudy

    • 54
    • 66

    Partly Sunny

Today 18 Sep Hamlin

Showers with a chance of Thunderstorms in the Morning, then a chance of Showers in the afternoon. Highs in the mid 60s. East Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain near 100 percent.

Tonight 18 Sep Hamlin

Cloudy. A chance of Showers, mainly in the evening. Lows in the mid 50s. Northeast Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening. Chance of rain 50 percent.

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Gertson Slough Temperature Statistics

September Temperature

Watertown, Watertown Municipal Airport (24.9 miles)

  • Lowest 13 September, 2026

    46.7 °F

  • Average September

    69.8 °F

  • Highest 3 September, 2026

    93.7 °F

Climate (2021–2026)

Watertown, Watertown Municipal Airport (24.9 miles)

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  • Average Low 2021–2026

    35.2 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    56 °F
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