Sidney Weather Forecast

    • 51
    • 72

    Slight Chance Rain Showers

    • 57
    • 84

    Chance Thunderstorms

    • 56
    • 78

    Rain Showers Likely

    • 55
    • 85

    Chance Rain Showers

    • 48
    • 76

    Chance Rain Showers

    • 48
    • 76

    Slight Chance Thunderstorms

Today 15 Sep Cheyenne

Mostly sunny. Not as warm with Highs in the lower 70s. Northeast Winds 10 to 15 Mph, becoming southeast in the afternoon.

Tonight 15 Sep Cheyenne

Partly cloudy. Cooler with Lows in the upper 40s. North Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sidney Temperature Statistics

September Temperature

Sidney, Sidney Municipal Airport (2.5 miles)

  • Lowest 12 September, 2026

    52 °F

  • Average September

    73.1 °F

  • Highest 4 September, 2026

    96.7 °F

Climate (2021–2026)

Sidney, Sidney Municipal Airport (2.5 miles)

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  • Average Low 2021–2026

    35 °F

  • Average 2021–2026

    50.2 °F

  • Average High 2021–2026

    65.4 °F
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