Sidney Weather Forecast

    • 63
    • 93

    Mostly Sunny

    • 63
    • 93

    Chance Thunderstorms

    • 65
    • 92

    Chance Thunderstorms

    • 62
    • 91

    Rain Showers Likely

    • 60
    • 88

    Partly Sunny

    • 60
    • 87

    Partly Sunny

    • 60
    • 89

    Slight Chance Thunderstorms

Today 4 Sep Cheyenne

Sunny, hot. Near steady temperature around 90. North Winds 5 to 10 Mph.

Tonight 4 Sep Cheyenne

Mostly clear. Lows in the lower 60s. South Winds 5 to 10 Mph.

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Sidney Temperature Statistics

September Temperature

Sidney, Sidney Municipal Airport (2.5 miles)

  • Lowest 1 September, 2026

    59 °F

  • Average September

    73.3 °F

  • Highest 2 September, 2026

    91.9 °F

Climate (2021–2026)

Sidney, Sidney Municipal Airport (2.5 miles)

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  • Average Low 2021–2026

    35 °F

  • Average 2021–2026

    50.1 °F

  • Average High 2021–2026

    65.4 °F
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