South Twin Mountain Weather Forecast

    • 50
    • 60

    Mostly Cloudy

    • 45
    • 59

    Chance Rain Showers

    • 56
    • 59

    Rain Showers

    • 46
    • 62

    Chance Rain Showers

    • 42
    • 54

    Mostly Sunny

    • 47
    • 61

    Partly Sunny

    • 49
    • 62

    Chance Rain Showers

Today 7 Sep Northern Grafton

Mostly sunny. Highs in the lower 70s. Northwest Winds around 10 Mph with Gusts up to 25 Mph.

Tonight 7 Sep Northern Grafton

Partly cloudy. Patchy fog after midnight. Lows in the lower 50s. Northwest Winds around 10 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Twin Mountain Temperature Statistics

September Temperature

Whitefield - Mount Washington Regional Airport (11.8 miles)

  • Lowest 1 September, 2026

    45 °F

  • Average September

    62.5 °F

  • Highest 3 September, 2026

    75.9 °F

Climate (2021–2026)

Whitefield - Mount Washington Regional Airport (11.8 miles)

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  • Average Low 2021–2026

    32.2 °F

  • Average 2021–2026

    43.9 °F

  • Average High 2021–2026

    55.1 °F
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