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Billys Bayou Lake, LA Weather Forecast
Billys Bayou Lake, LA Weather Forecast Date: 146 PM CDT Sat Aug 08 2026
The area/counties/county of: Catahoula, including the cities of: Jonesville and Harrisonburg.or toggle through each period.
This Afternoon... Mostly sunny with a slight chance of showers and thunderstorms. Near steady temperature in the lower 90s. South winds around 5 mph. Chance of rain 20%. Heat index values up to 105.
Tonight... Partly cloudy. A chance of showers and thunderstorms in the evening. Humid with lows in the lower 70s. South winds around 5 mph in the evening, becoming light and variable. Chance of rain 50%.
Sunday... Mostly sunny. Humid with highs in the mid 90s. Light and variable winds, becoming south around 5 mph in the afternoon. Heat index values up to 106.
Sunday Night... Partly cloudy in the evening, then clearing. Humid with lows in the lower 70s. South winds around 5 mph.
Monday... Sunny with highs in the mid 90s. South winds 5 to 10 mph. Heat index values up to 107.
Monday Night... Partly cloudy in the evening, then clearing. Lows in the lower 70s.
Tuesday... Mostly clear. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105.
Wednesday... Mostly clear. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105.
Thursday... Mostly clear. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105.
POP = Probability of Precipitation
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