Keystone, Louisiana Weather
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Weather Forecast for Keystone, Louisiana : St. Martin County
Issued: 3:45 pm CDT Jun 4, 2025 Latitude: 30.0804797 Longitude: -91.837617 View on Google Maps

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This Afternoon Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
40% chance of thunderstorms on This Afternoon 30% chance of thunderstorms on Tonight 30% chance of rain on Thursday 30% chance of thunderstorms on Friday 30% chance of thunderstorms on Saturday 50% chance of thunderstorms on Sunday 80% chance of thunderstorms on Monday 90% chance of thunderstorms on Tuesday Thunderstorms on Wednesday
High: 90°F Low: 73°F High: 92°F High: 92°F High: 92°F High: 93°F High: 92°F High: 90°F High: 88°F
Low: 74°F Low: 75°F Low: 76°F Low: 76°F Low: 75°F Low: 74°F  
Thunderstorms Thunderstorms Rain Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms
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Current Conditions at
NEW IBERIA/ACADIANA - (KARA)
88°
Feels like 95°F
Partly Cloudy
as of 4:53 PM CDST
Rel. Humidity: 62%
Dew Point: 73°F
Visibility: 10 Miles
Pressure: 29.90 in.
Flight Rule: VFR
Wind Data
5 MPH
190° South
Cloud Level(s): Few at 4600ft, Few at 6000ft, Scattered at 7500ft
Current Conditions at
LAFAYETTE - (KLFT)
88°
Feels like 93°F
Mostly Clear
as of 4:53 PM CDST
Rel. Humidity: 58%
Dew Point: 72°F
Visibility: 10 Miles
Pressure: 29.90 in.
Flight Rule: VFR
Wind Data
3 MPH
140° Southeast
Cloud Level(s): Few at 4600ft
Current Conditions at
PATTERSON MEMORIAL - (KPTN)
86°
Feels like 95°F
Mostly Clear
as of 4:56 PM CDST
Rel. Humidity: 70%
Dew Point: 75°F
Visibility: 10 Miles
Pressure: 29.93 in.
Flight Rule: VFR
Wind Data
9 MPH
120° Southeast
Cloud Level(s): Few at 5500ft
Current Conditions at
BATON ROUGE - (KBTR)
91°
Feels like 96°F
Mostly Clear
as of 4:53 PM CDST
Rel. Humidity: 49%
Dew Point: 70°F
Visibility: 10 Miles
Pressure: 29.91 in.
Flight Rule: VFR
Wind Data
8 MPH
090° East
Cloud Level(s): Few at 5000ft
40% chance of thunderstorms This Afternoon This Afternoon... A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. South wind around 5 mph.
30% chance of thunderstorms Tonight Tonight... A 30 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.
30% chance of rain Thursday Thursday... A 30 percent chance of showers, mainly between 1pm and 3pm. Mostly sunny, with a high near 92. Heat index values as high as 101. Calm wind becoming south around 5 mph in the afternoon.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 74. South wind around 5 mph becoming calm in the evening.
30% chance of thunderstorms Friday Friday... A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. Light southeast wind becoming south 5 to 10 mph in the morning.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 75. South wind 5 to 10 mph.
30% chance of thunderstorms Saturday Saturday... A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 92. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 76. Southwest wind 5 to 10 mph.
50% chance of thunderstorms Sunday Sunday... A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 93. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
30% chance of thunderstorms Sunday Night Sunday Night... A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 76.
80% chance of thunderstorms Monday Monday... Showers and thunderstorms. High near 92. Chance of precipitation is 80%.
40% chance of thunderstorms Monday Night Monday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75.
90% chance of thunderstorms Tuesday Tuesday... Showers and possibly a thunderstorm. High near 90. Chance of precipitation is 90%.
40% chance of thunderstorms Tuesday Night Tuesday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.
Thunderstorms on Wednesday Wednesday... Showers and possibly a thunderstorm. Mostly cloudy, with a high near 88.
Current Radar Image


Sun Almanac for Keystone, Louisiana
Sunrise: 06:06 AM
Sunset: 8:06 PM
Civil Sunrise:05:39 AM
Civil Sunset: 8:33 PM
Nautical Sunrise: 05:06 AM
Nautical Sunset: 9:06 PM
Astro Sunrise: 04:31 AM
Astro Sunset: 9:41 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.