Jarchow Reservoir Weather Forecast

    • 45
    • 73

    Mostly Sunny

    • 56
    • 83

    Mostly Sunny

    • 49
    • 86

    Mostly Sunny

    • 54
    • 83

    Mostly Sunny

    • 62
    • 90

    Slight Chance Thunderstorms

    • 61
    • 94

    Slight Chance Thunderstorms

Today 10 May Jefferson

Sunny. Not as warm with Highs in the lower 70s. Northwest Winds around 5 Mph.

Tonight 10 May Jefferson

Mostly clear. Lows in the mid 40s. Southwest Winds 5 to 10 Mph.

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Jarchow Reservoir Temperature Statistics

May Temperature

Hebron, Hebron Municipal Airport (23 miles)

  • Lowest 2 May, 2026

    30 °F
  • Average May

    57.5 °F
  • Highest 4 May, 2026

    85.5 °F

Climate (2021–Present)

Hebron, Hebron Municipal Airport (23 miles)

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  • Average Low 2021–2026

    42.6 °F
  • Average 2021–2026

    54.5 °F
  • Average High 2021–2026

    67 °F
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