Peterson Reservoir Weather Forecast

    • 56
    • 69

    Rain Showers

    • 51
    • 84

    Rain Showers Likely

    • 52
    • 69

    Chance Rain Showers

    • 55
    • 68

    Chance Rain Showers

    • 53
    • 69

    Chance Thunderstorms

    • 54
    • 70

    Chance Rain Showers

Today 13 Sep Keya Paha

Mostly cloudy. Highs in the upper 60s. East Winds 10 to 20 Mph.

Tonight 13 Sep Keya Paha

Breezy. Mostly cloudy. Showers and a slight chance of Thunderstorms after midnight. Lows in the upper 50s. Southeast Winds 15 to 25 Mph. Chance of precipitation 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Peterson Reservoir Temperature Statistics

September Temperature

Ainsworth Regional Airport (39.8 miles)

  • Lowest 10 September, 2026

    54.5 °F

  • Average September

    74.7 °F

  • Highest 3 September, 2026

    93.9 °F

Climate (2021–2026)

Ainsworth Regional Airport (39.8 miles)

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  • Average Low 2021–2026

    38.1 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    62.6 °F
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