National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Current conditions at

Lafayette, Lafayette Regional Airport (KLFT)

Lat: 30.2°NLon: 91.99°WElev: 39ft.

Fair

84°F

29°C

Humidity 67%
Wind Speed S 9 mph
Barometer 30.02 in (1016.4 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 12 Oct 5:53 pm CDT
Extended Forecast for

Mermentau LA

  • Tonight

    Tonight: Mostly clear, with a low around 72. Southeast wind 5 to 10 mph.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 3pm. Sunny, with a high near 90. Heat index values as high as 97. South wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69. South wind 5 to 10 mph becoming light in the evening.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 90. Light southeast wind increasing to 5 to 10 mph in the morning.

    High: 90 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 68. South wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 89. Light east wind becoming southeast 5 to 10 mph in the morning.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 67. South wind around 5 mph becoming calm in the evening.

    Low: 67 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 89. Northeast wind 5 to 10 mph.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. North wind 10 to 15 mph increasing to 15 to 20 mph in the evening. Winds could gust as high as 30 mph.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 72. Southeast wind 5 to 10 mph.
Tuesday
A slight chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 3pm. Sunny, with a high near 90. Heat index values as high as 97. South wind 5 to 10 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 69. South wind 5 to 10 mph becoming light in the evening.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 90. Light southeast wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Clear, with a low around 68. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 89. Light east wind becoming southeast 5 to 10 mph in the morning.
Thursday Night
Clear, with a low around 67. South wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 89. Northeast wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 62. North wind 10 to 15 mph increasing to 15 to 20 mph in the evening. Winds could gust as high as 30 mph.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 83.
Sunday Night
A 20 percent chance of showers. Mostly clear, with a low around 65.
Monday
A 30 percent chance of showers. Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mermentau LA
 30.18°N 92.58°W
Last Update:
6:06 pm CDT Oct 12, 2026
Forecast Valid:
6pm CDT Oct 12, 2026-6pm CDT Oct 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation