Mercer Weather Forecast

    • 46
    • 74

    Partly Sunny

    • 43
    • 65

    Rain Showers Likely

    • 46
    • 65

    Rain Showers

    • 43
    • 69

    Chance Rain Showers

    • 42
    • 66

    Partly Sunny

    • 43
    • 69

    Mostly Cloudy

Today 11 Sep Eastern McLean

Decreasing Clouds. A slight chance of Showers in the afternoon. Highs in the lower 70s. North Winds 5 to 10 Mph, increasing to 10 to 20 Mph. Chance of rain 20 percent.

Tonight 11 Sep Eastern McLean

Increasing Clouds. Lows in the mid 40s. Northwest Winds 5 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mercer Temperature Statistics

September Temperature

Garrison (35.4 miles)

  • Lowest 1 September, 2026

    50.6 °F

  • Average September

    70.9 °F

  • Highest 4 September, 2026

    91.7 °F

Climate (2021–2026)

Garrison (35.4 miles)

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  • Average Low 2021–2026

    31.3 °F

  • Average 2021–2026

    42.6 °F

  • Average High 2021–2026

    54.1 °F
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