Henderson Bay Weather Forecast

    • 45
    • 59

    Rain Showers

    • 41
    • 50

    Mostly Sunny

    • 40
    • 49

    Mostly Sunny

    • 42
    • 50

    Rain Showers

    • 46
    • 56

    Rain Showers Likely

    • 46
    • 56

    Chance Rain Showers

    • 47
    • 59

    Mostly Cloudy

Today 9 May Jefferson

Partly to mostly sunny. Highs Ranging from the upper 50s on the tug hill to the mid 60s across the lower Elevations. South Winds 5 to 10 Mph.

Tonight 9 May Jefferson

Mostly cloudy. A chance of Showers Early, then Showers through the early overnight. Lows in the mid 40s. South Winds 5 to 10 Mph, becoming southwest. Chance of rain 90 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Henderson Bay Temperature Statistics

May Temperature

Watertown, Watertown International Airport (9.9 miles)

  • Lowest 1 May, 2026

    29.6 °F

  • Average May

    47.9 °F

  • Highest 4 May, 2026

    70.6 °F

Climate (2021–Present)

Watertown, Watertown International Airport (9.9 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    38.4 °F

  • Average 2021–2026

    48.3 °F

  • Average High 2021–2026

    57.6 °F
Get WillyWeather+ to remove ads