Saint Mary Parish, LA Weather Forecast
County weather hub
Chance Showers And Thunderstorms
Compare major city weather across Saint Mary Parish, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Southeast wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
County Weather Overview
This county weather page brings together forecast coverage for Saint Mary Parish so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 6 of 6 mapped cities in Saint Mary Parish.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 17 to May 23, 2026
- Latest sync
- May 17, 2026 6:17 PM CDT
- Forecast office
- LCH
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Mary Parish
Monday looks like the warmest upcoming period in Saint Mary Parish at 88 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 72 degrees F.
The strongest winds are forecast for This Afternoon at about 15 mph SE.
Precipitation is mentioned in 12 upcoming forecast periods.
Forecast Details
- Last updated
- May 17, 2026 6:17 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LCH
- Radar station
- KLCH
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 76. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Mostly sunny, with a high near 88. Heat index values as high as 99. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Mostly cloudy, with a low around 76. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. Southeast wind 0 to 10 mph. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Mostly sunny, with a high near 87. Southeast wind 5 to 10 mph. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Southeast wind 0 to 5 mph. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Southeast wind 0 to 10 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 73. Chance of precipitation is 40%.
Showers and thunderstorms likely. Partly sunny, with a high near 86. Chance of precipitation is 60%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Mostly cloudy, with a high near 86. Chance of precipitation is 60%.
Showers and thunderstorms likely before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
May 17
|
Chance Showers And Thunderstorms
|
86°F |
15 mph
SE
|
|
Tonight
May 17
|
Chance Showers And Thunderstorms then Mostly Cloudy
|
76°F |
10 to 15 mph
SE
|
|
Monday
May 18
|
Mostly Sunny
|
88°F |
10 to 15 mph
SE
|
|
Monday Night
May 18
|
Mostly Cloudy
|
76°F |
5 to 15 mph
SE
|
|
Tuesday
May 19
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
88°F |
5 to 15 mph
SE
|
|
Tuesday Night
May 19
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
74°F |
0 to 10 mph
SE
|
|
Wednesday
May 20
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
87°F |
5 to 10 mph
SE
|
|
Wednesday Night
May 20
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
72°F |
0 to 5 mph
SE
|
|
Thursday
May 21
|
Chance Showers And Thunderstorms
|
86°F |
0 to 10 mph
SE
|
|
Thursday Night
May 21
|
Chance Showers And Thunderstorms
|
73°F |
0 to 5 mph
S
|
|
Friday
May 22
|
Showers And Thunderstorms Likely
|
86°F |
0 to 10 mph
S
|
|
Friday Night
May 22
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
74°F |
5 mph
S
|
|
Saturday
May 23
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
86°F |
5 to 10 mph
S
|
|
Saturday Night
May 23
|
Showers And Thunderstorms Likely
|
73°F |
0 to 5 mph
SE
|
Major City Forecasts
Live forecast snapshots for major cities across Saint Mary Parish.
Coverage
Forecast coverage currently spans 6 of 6 mapped cities in Saint Mary Parish.
Largest mapped city population in this region: 10,742.
