Gann Valley Weather Forecast

    • 39
    • 50

    Rain Showers

    • 32
    • 55

    Partly Sunny

    • 41
    • 64

    Mostly Cloudy

    • 42
    • 66

    Chance Rain Showers

    • 42
    • 64

    Chance Thunderstorms

    • 46
    • 72

    Slight Chance Rain Showers

    • 52
    • 83

    Mostly Sunny

Today 18 May Buffalo

Showers with a slight chance of Thunderstorms. Much cooler. Near steady temperature in the mid 40s. North Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 80 percent.

Tonight 18 May Buffalo

Cloudy. Showers, mainly this evening. Lows around 40. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Gann Valley Temperature Statistics

May Temperature

Chamberlain, Chamberlain Municipal Airport (24.2 miles)

  • Lowest 6 May, 2026

    27.9 °F

  • Average May

    57.2 °F

  • Highest 11 May, 2026

    88.7 °F

Climate (2021–Present)

Chamberlain, Chamberlain Municipal Airport (24.2 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    47.8 °F

  • Average High 2021–2026

    59.7 °F
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