Johnson Lake Weather Forecast

    • 70
    • 92

    Slight Chance Thunderstorms

    • 70
    • 92

    Slight Chance Thunderstorms

    • 70
    • 93

    Partly Sunny

    • 71
    • 92

    Chance Thunderstorms

    • 71
    • 93

    Chance Thunderstorms

    • 69
    • 91

    Chance Thunderstorms

    • 69
    • 89

    Chance Thunderstorms

Today 18 Sep Washington

Partly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the lower 90s. Southeast Winds around 5 Mph. Chance of rain 30 percent.

Tonight 18 Sep Washington

Mostly cloudy. A chance of Showers and Thunderstorms this evening. Lows around 70. South Winds around 5 Mph. Chance of rain 30 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnson Lake Temperature Statistics

September Temperature

Brenham, Brenham Municipal Airport (6.2 miles)

  • Lowest 9 September, 2025

    59.9 °F

  • Average September

    78.8 °F

  • Highest 4 September, 2025

    97.9 °F

Climate (2020–Present)

Brenham, Brenham Municipal Airport (6.2 miles)

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

  • Average Low 2020–2025

    60.4 °F

  • Average 2020–2025

    70.2 °F

  • Average High 2020–2025

    81 °F
Get WillyWeather+ to remove ads