St. Marys, GA Weather Forecast

Local 7-day forecast

92°

Mostly Sunny then Slight Chance Showers And Thunderstorms

Track current conditions, temperature changes, wind, and the full daily outlook for St. Marys, GA in one place.

Wednesday, July 15, 2026

Wind: 3 to 7 mph W

Wednesday

A slight chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers and thunderstorms. Mostly sunny. High near 92, with temperatures falling to around 90 in the afternoon. Heat index values as high as 100. West wind 3 to 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Local 7-day forecast

Local Weather Overview

This forecast page for St. Marys, GA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 14, 2026 11:25 PM EDT.

The active forecast window currently covers Jul 15 to Jul 21, 2026 for St. Marys, GA.

Page Snapshot

Page focus: city weather
Forecast window: Jul 15 to Jul 21, 2026
Latest sync: Jul 14, 2026 11:25 PM EDT
Forecast office: JAX
Source: NOAA / NWS

Next High

92°F

Wednesday

Next Low

75°F

Wednesday Night

Rain Outlook

Periods mentioning precipitation

Windiest

2 to 8 mph

Saturday

Daily Outlook

Today

Jul 15

Mostly Sunny then Slight Chance Showers And Thunderstorms

92 °F

/ 75°F

Wind 3 to 7 mph

Thu

Jul 16

Mostly Sunny then Chance Showers And Thunderstorms

93 °F

/ 76°F

Wind 6 mph

Fri

Jul 17

Mostly Sunny then Slight Chance Showers And Thunderstorms

93 °F

/ 76°F

Wind 6 mph

Sat

Jul 18

Mostly Sunny then Chance Showers And Thunderstorms

93 °F

/ 76°F

Wind 2 to 8 mph

Sun

Jul 19

Mostly Sunny then Chance Showers And Thunderstorms

93 °F

/ 77°F

Wind 5 to 8 mph

Mon

Jul 20

Mostly Sunny then Chance Showers And Thunderstorms

92 °F

/ 77°F

Wind 5 to 8 mph

Tue

Jul 21

Mostly Sunny then Chance Showers And Thunderstorms

94 °F

Wind 5 to 8 mph

This Week in St. Marys

Tuesday looks like the warmest upcoming period in St. Marys at 94 degrees F.

Wednesday Night is the coolest period ahead with temperatures near 75 degrees F.

The strongest winds are forecast for Saturday at about 2 to 8 mph SW.

Precipitation is mentioned in 13 upcoming forecast periods.

Forecast Details

Last updated: Jul 14, 2026 11:25 PM EDT
Coverage: 7 days
Time zone: America/New_York
Forecast office: JAX
Radar station: KJAX

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Wednesday Night

Jul 15

75°F

Chance Showers And Thunderstorms then Partly Cloudy

0 to 5 mph W

A chance of showers and thunderstorms before 8pm. Partly cloudy. Low around 75, with temperatures rising to around 76 overnight. West wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

Thursday

Jul 16

93°F

Mostly Sunny then Chance Showers And Thunderstorms

6 mph W

A chance of showers and thunderstorms after 2pm. Mostly sunny. High near 93, with temperatures falling to around 91 in the afternoon. Heat index values as high as 103. West wind around 6 mph. Chance of precipitation is 40%.

Thursday Night

Jul 16

76°F

Chance Showers And Thunderstorms then Partly Cloudy

3 mph SW

A chance of showers and thunderstorms before 8pm. Partly cloudy. Low around 76, with temperatures rising to around 78 overnight. Southwest wind around 3 mph. Chance of precipitation is 40%.

Friday

Jul 17

93°F

Mostly Sunny then Slight Chance Showers And Thunderstorms

6 mph SW

A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 20%.

Friday Night

Jul 17

76°F

Slight Chance Showers And Thunderstorms then Partly Cloudy

2 to 6 mph SW

A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Chance of precipitation is 20%.

Saturday

Jul 18

93°F

Mostly Sunny then Chance Showers And Thunderstorms

2 to 8 mph SW

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 30%.

Saturday Night

Jul 18

76°F

Chance Showers And Thunderstorms

3 to 7 mph SW

A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Chance of precipitation is 30%.

Sunday

Jul 19

93°F

Mostly Sunny then Chance Showers And Thunderstorms

5 to 8 mph SW

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 40%.

Sunday Night

Jul 19

77°F

Chance Showers And Thunderstorms then Partly Cloudy

3 to 7 mph SW

A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Chance of precipitation is 40%.

Monday

Jul 20

92°F

Mostly Sunny then Chance Showers And Thunderstorms

5 to 8 mph SW

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 40%.

Monday Night

Jul 20

77°F

Chance Showers And Thunderstorms then Partly Cloudy

7 mph SW

A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Chance of precipitation is 40%.

Tuesday

Jul 21

94°F

Mostly Sunny then Chance Showers And Thunderstorms

5 to 8 mph SW

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Wednesday Jul 15	Mostly Sunny then Slight Chance Showers And Thunderstorms	92°F	3 to 7 mph W	A slight chance of showers and thunderstorms between 2pm and 5pm, then a chance of showers and thunderstorms. Mostly sun...
Wednesday Night Jul 15	Chance Showers And Thunderstorms then Partly Cloudy	75°F	0 to 5 mph W	A chance of showers and thunderstorms before 8pm. Partly cloudy. Low around 75, with temperatures rising to around 76 ov...
Thursday Jul 16	Mostly Sunny then Chance Showers And Thunderstorms	93°F	6 mph W	A chance of showers and thunderstorms after 2pm. Mostly sunny. High near 93, with temperatures falling to around 91 in t...
Thursday Night Jul 16	Chance Showers And Thunderstorms then Partly Cloudy	76°F	3 mph SW	A chance of showers and thunderstorms before 8pm. Partly cloudy. Low around 76, with temperatures rising to around 78 ov...
Friday Jul 17	Mostly Sunny then Slight Chance Showers And Thunderstorms	93°F	6 mph SW	A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 20...
Friday Night Jul 17	Slight Chance Showers And Thunderstorms then Partly Cloudy	76°F	2 to 6 mph SW	A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Chance of precipitation is...
Saturday Jul 18	Mostly Sunny then Chance Showers And Thunderstorms	93°F	2 to 8 mph SW	A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
Saturday Night Jul 18	Chance Showers And Thunderstorms	76°F	3 to 7 mph SW	A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Chance of precipitation is 30%.
Sunday Jul 19	Mostly Sunny then Chance Showers And Thunderstorms	93°F	5 to 8 mph SW	A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 40%.
Sunday Night Jul 19	Chance Showers And Thunderstorms then Partly Cloudy	77°F	3 to 7 mph SW	A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Chance of precipitation is 40%.
Monday Jul 20	Mostly Sunny then Chance Showers And Thunderstorms	92°F	5 to 8 mph SW	A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
Monday Night Jul 20	Chance Showers And Thunderstorms then Partly Cloudy	77°F	7 mph SW	A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77. Chance of precipitation is 40%.
Tuesday Jul 21	Mostly Sunny then Chance Showers And Thunderstorms	94°F	5 to 8 mph SW	A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94.

Nearby Forecasts

Explore weather pages for nearby cities and major places around St. Marys.

Region Links

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Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.