Hyannis Weather Forecast

    • 57
    • 77

    Mostly Cloudy

    • 59
    • 76

    Rain Showers Likely

    • 55
    • 80

    Chance Rain Showers

    • 53
    • 72

    Rain Showers

    • 51
    • 68

    Rain Showers Likely

    • 51
    • 70

    Slight Chance Thunderstorms

    • 53
    • 73

    Slight Chance Thunderstorms

Today 16 Sep Grant

Mostly sunny. Highs in the mid 70s.

Tonight 16 Sep Grant

Mostly cloudy. Lows in the upper 50s. South Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Hyannis Temperature Statistics

September Temperature

Alliance, Alliance Municipal Airport (53.4 miles)

  • Lowest 12 September, 2026

    47.6 °F

  • Average September

    70.3 °F

  • Highest 5 September, 2026

    96.7 °F

Climate (2021–2026)

Alliance, Alliance Municipal Airport (53.4 miles)

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  • Average Low 2021–2026

    33.4 °F

  • Average 2021–2026

    49.4 °F

  • Average High 2021–2026

    64.8 °F
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