Saint Mary, MO Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Saint Mary, MO in one place.
A chance of showers and thunderstorms between 2pm and 5pm. Mostly sunny. High near 85, with temperatures falling to around 83 in the afternoon. South wind 6 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Local Weather Overview
This forecast page for Saint Mary, MO 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: Apr 17, 2026 8:48 AM CDT.
The active forecast window currently covers Apr 17 to Apr 23, 2026 for Saint Mary, MO.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 17 to Apr 23, 2026
- Latest sync
- Apr 17, 2026 8:48 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Saint Mary
Today looks like the warmest upcoming period in Saint Mary at 85 degrees F.
Saturday Night is the coolest period ahead with temperatures near 38 degrees F.
The strongest winds are forecast for Today at about 6 to 16 mph S.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 17, 2026 8:48 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
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 between 11pm and 2am, then showers and thunderstorms. Mostly cloudy. Low around 49, with temperatures rising to around 62 overnight. Southwest wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Showers and thunderstorms. Mostly cloudy. High near 63, with temperatures falling to around 58 in the afternoon. Northwest wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 80%.
A chance of rain showers before 7pm. Mostly clear, with a low around 38. West northwest wind 5 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Sunny, with a high near 68. West wind 5 to 10 mph, with gusts as high as 18 mph.
Mostly clear, with a low around 43. West southwest wind 2 to 7 mph.
Sunny, with a high near 73. South southeast wind 3 to 8 mph.
Mostly clear, with a low around 50. South wind around 7 mph.
Mostly sunny, with a high near 79. South southwest wind 7 to 13 mph, with gusts as high as 20 mph.
Partly cloudy, with a low around 55. South southwest wind 6 to 10 mph.
Sunny, with a high near 80. South southwest wind 6 to 10 mph.
Mostly clear, with a low around 57. South wind 6 to 9 mph.
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. South wind 6 to 13 mph, with gusts as high as 20 mph.
A slight chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 61. South wind around 12 mph, with gusts as high as 18 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Apr 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
85°F |
6 to 16 mph
S
|
|
Tonight
Apr 17
|
Chance Showers And Thunderstorms
|
49°F |
15 mph
SW
|
|
Saturday
Apr 18
|
Showers And Thunderstorms
|
63°F |
15 mph
NW
|
|
Saturday Night
Apr 18
|
Chance Rain Showers then Mostly Clear
|
38°F |
5 to 14 mph
WNW
|
|
Sunday
Apr 19
|
Sunny
|
68°F |
5 to 10 mph
W
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
43°F |
2 to 7 mph
WSW
|
|
Monday
Apr 20
|
Sunny
|
73°F |
3 to 8 mph
SSE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
50°F |
7 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
79°F |
7 to 13 mph
SSW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
55°F |
6 to 10 mph
SSW
|
|
Wednesday
Apr 22
|
Sunny
|
80°F |
6 to 10 mph
SSW
|
|
Wednesday Night
Apr 22
|
Mostly Clear
|
57°F |
6 to 9 mph
S
|
|
Thursday
Apr 23
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
82°F |
6 to 13 mph
S
|
|
Thursday Night
Apr 23
|
Slight Chance Showers And Thunderstorms
|
61°F |
12 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Saint Mary.