Big Lake Weather Forecast

    • 73
    • 99

    Hot

    • 72
    • 99

    Hot

    • 72
    • 95

    Mostly Sunny

    • 71
    • 95

    Slight Chance Thunderstorms

    • 71
    • 94

    Chance Thunderstorms

    • 71
    • 95

    Slight Chance Thunderstorms

    • 70
    • 94

    Slight Chance Thunderstorms

Today 7 Sep Union

Mostly sunny with a slight chance of Showers and Thunderstorms. Hot. Near steady temperature in the upper 90s. Northeast Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 108.

Tonight 7 Sep Union

Mostly clear. A slight chance of Showers and Thunderstorms this evening. Lows in the mid 70s. East Winds around 5 Mph this Evening, becoming light and variable. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Lake Temperature Statistics

September Temperature

Bastrop, Morehouse Memorial Airport (17.4 miles)

  • Lowest 5 September, 2026

    71.8 °F

  • Average September

    83.3 °F

  • Highest 5 September, 2026

    98.8 °F

Climate (2022–2026)

Bastrop, Morehouse Memorial Airport (17.4 miles)

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  • Average Low 2022–2026

    56.1 °F

  • Average 2022–2026

    65.9 °F

  • Average High 2022–2026

    77.1 °F
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