Louisiana December Weather: Downpours and Thunder Risk in New Orleans Late Week

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New Orleans, LA – Dark clouds are gathering again across southern Louisiana, and umbrellas will be essential. A series of Gulf-fed rain bands will drench New Orleans from late Wednesday into Friday, marking a soggy start to December for the Crescent City.

Meteorologists with the National Weather Service New Orleans/Baton Rouge office report a 70% chance of rain tonight, increasing to near 90% Thursday through Friday. A steady stream of moisture and mild temperatures around 55–60°F will feed repeated rounds of showers and isolated thunderstorms, some lasting well into the early morning hours Friday.

Rain totals may reach 1 to 2 inches by Friday morning, enough to create ponding on city streets and slowdowns along I-10 and the Causeway Bridge. Winds will stay light from the east but could briefly gust near storms. Temperatures remain stable, staying in the mid-50s to low 60s through Friday before a slow clearing trend develops Saturday.

Drivers and commuters should plan extra time for travel, especially during peak morning and evening hours. Avoid low-lying routes prone to flooding and use headlights during downpours for better visibility.

Five-Day Outlook for New Orleans, LA:

  • Thursday: Showers, high 57°F.
  • Thursday Night: Rain likely, low 53°F.
  • Friday: More showers, high 59°F.
  • Saturday: Showers tapering off, high 60°F.
  • Sunday: Mostly sunny, high 65°F.