Morgan City, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Morgan City, a city in St. Mary County, Louisiana.
Today
91°F
Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2pm. Sunny, with a high near 91. Heat index values as high as 98. North wind 0 to 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Morgan City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 91°F | Sunny then Chance Showers And Thunderstorms | 0 to 10 mph N | 35% |
| Tonight | 78°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph SW | 18% |
| Wednesday | 91°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 45% |
| Wednesday Night | 78°F | Mostly Clear | 0 to 5 mph S | 12% |
| Thursday | 90°F | Sunny then Showers And Thunderstorms Likely | 0 to 5 mph SE | 58% |
| Thursday Night | 77°F | Showers And Thunderstorms Likely then Mostly Clear | 0 to 5 mph SE | 58% |
| Friday | 90°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 51% |
| Friday Night | 77°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 51% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 53% |
| Saturday Night | 77°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 53% |
| Sunday | 89°F | Showers And Thunderstorms Likely | 0 to 5 mph E | 70% |
| Sunday Night | 78°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 70% |
| Monday | 89°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 65% |
| Monday Night | 78°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 65% |
Forecast source: National Weather Service (api.weather.gov) for Morgan City (29.710, -91.192). Updated through the day.
Growing snapshot for Morgan City
Last spring frost
Jan 30
First fall frost
Jan 1
Growing season
335 days
Hardiness zone
9b
More local growing data for Morgan City: nearby ZIP 70342 weather · frost dates · planting calendar · Louisiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Morgan City, La (3.8 mi from Morgan City). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.