Seneca Weather Forecast

    • 68
    • 85

    Chance Thunderstorms

    • 62
    • 77

    Chance Rain Showers

    • 62
    • 81

    Mostly Sunny

    • 67
    • 82

    Chance Rain Showers

    • 64
    • 84

    Chance Rain Showers

    • 58
    • 81

    Slight Chance Thunderstorms

Today 20 Aug Northwest Montgomery

Patchy fog in the morning. Mostly cloudy in the Morning, then partly sunny with a chance of Showers and Thunderstorms in the afternoon. Highs in the mid 80s. Southeast Winds around 5 Mph. Chance of rain 40 percent.

Tonight 20 Aug Northwest Montgomery

Mostly cloudy with a chance of Showers. A chance of Thunderstorms, mainly in the evening. Lows in the upper 60s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

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Seneca Temperature Statistics

August Temperature

Gaithersburg - Montgomery County Airport (11.2 miles)

  • Lowest 3 August, 2025

    55.4 °F

  • Average August

    73.4 °F

  • Highest 17 August, 2025

    93 °F

Climate (2020–Present)

Gaithersburg - Montgomery County Airport (11.2 miles)

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  • Average Low 2020–2025

    46.4 °F

  • Average 2020–2025

    56.1 °F

  • Average High 2020–2025

    65.9 °F
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