Weather in Geismar, LA
Updated 2026-09-26 12:30 local time · ZIP codes 70734
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
87°10% rain89°10% rain90°10% rain90°10% rain89°10% rain88°10% rain84°11% rain
79°13% rain77°14% rain75°14% rain74°15% rain73°18% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 20%).
It feels like 87°F with winds near 4 mph.
77°F, 14% rain chance and 5 mph wind.
Visibility is around 6 mi; gusts may reach 17 mph.
Current temperature is 87°F, wind 4 mph, rain chance up to 20%.
UV index is 7. Sunscreen, shade and protective clothing are recommended.
Local weather characteristics in Geismar
Louisiana is warm, humid and rainy, with hot summers, mild winters, frequent thunderstorms and exposure to tropical storms and hurricanes near the Gulf Coast.
Geismar is part of the South weather region. The forecast point is near 30.20°N latitude and 91.02°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Geismar weather today
Overcast and 87°F in Geismar, LA. Today's high is 90°F with a 13% rain chance. Winds are around 4 mph with gusts near 4 mph. Relative humidity is 44%, pressure is 30.02 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Geismar
Sunrise is at 06:54 AM and sunset is at 06:56 PM. Tomorrow's forecast calls for Sunny with a high near 93°F and a low near 69°F. The maximum rain chance is 5%.