West Sister Weather Forecast

    • 55
    • 63

    Mostly Sunny

    • 62
    • 70

    Partly Sunny

    • 63
    • 68

    Chance Rain Showers

    • 57
    • 69

    Partly Sunny

    • 59
    • 64

    Chance Rain Showers

    • 57
    • 65

    Chance Rain Showers

Today 15 Sep Coastal York

Sunny. Highs in the upper 60s. Light and variable Winds.

Tonight 15 Sep Coastal York

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 40s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

West Sister Temperature Statistics

September Temperature

Pease Air Force Base / Portsmouth (6.8 miles)

  • Lowest 12 September, 2026

    48 °F

  • Average September

    66.6 °F

  • Highest 10 September, 2026

    86.5 °F

Climate (2021–2026)

Pease Air Force Base / Portsmouth (6.8 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    59.2 °F
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