Nampa Weather Forecast

    • 53
    • 81

    Becoming Sunny

    • 51
    • 82

    Increasing Clouds

    • 50
    • 74

    Slight Chance Thunderstorms

    • 50
    • 77

    Sunny

    • 51
    • 80

    Mostly Sunny

    • 52
    • 82

    Mostly Sunny

    • 50
    • 81

    Mostly Sunny

Today 16 Sep Lower Treasure Valley

Sunny. Highs 80 to 86. Northwest Winds up to 10 Mph. Gusts to 20 Mph this morning.

Tonight 16 Sep Lower Treasure Valley

Partly cloudy this Evening, then mostly cloudy with isolated Showers and Thunderstorms after midnight. Chance of rain 20 percent. Lows 52 to 57. Northwest Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Nampa Temperature Statistics

September Temperature

Nampa Municipal Airport (3.1 miles)

  • Lowest 8 September, 2026

    44.6 °F

  • Average September

    63.5 °F

  • Highest 12 September, 2026

    89.6 °F

Climate (2021–2026)

Nampa Municipal Airport (3.1 miles)

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  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    65.3 °F
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