Live Weather & Forecast

Weather in Lake Saint Louis

Missouri, United States · Real-time conditions & 3-day outlook

Flag of United States
Partly cloudy
21°C
Feels like 21°C
70°F / Feels 70°F
Partly cloudy
Lake Saint Louis, Missouri
🌞 Daytime
Updated: 2026-04-13 06:30
💧
Humidity
73%
💨
Wind
21.6 km/h SSW
🌬️
Wind Gust
35.6 km/h
🌡️
Pressure
1014 mb
👁️
Visibility
16 km
☀️
UV Index
0 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
75%
💦
Dew Point
16.2°C
🌐
Wind Degree
206°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
146.9 μg/m³
NO₂
2.9 μg/m³
O₃
77 μg/m³
SO₂
1.4 μg/m³
PM 2.5
3.5 μg/m³
PM 10
3.9 μg/m³

Weather Alerts 4

Met · Severe · Immediate
Flood Warning issued April 12 at 11:41AM CDT until April 20 at 7:00AM CDT by NWS St Louis MO

...The Flood Warning continues for the following river in Missouri and Illinois... Mississippi River at Hannibal Clarksville Louisiana River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Clarksville. * WHEN...Until Monday, April 20. * ADDITI...

Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Effective: 2026-04-12T11:41:00-05:00  ·  Expires: 2026-04-13T23:45:00-05:00
Met · Severe · Immediate
Flood Warning issued April 12 at 9:46PM CDT until April 20 at 7:00AM CDT by NWS St Louis MO

...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Clarksville. Mississippi River at Louisiana. Mississippi River at Hannibal. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Clarksville....

Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Effective: 2026-04-12T21:46:00-05:00  ·  Expires: 2026-04-14T10:00:00-05:00
Met · Severe · Immediate
Flood Warning issued April 12 at 11:41AM CDT until April 20 at 7:00AM CDT by NWS St Louis MO

...The Flood Warning continues for the following river in Missouri and Illinois... Mississippi River at Hannibal Clarksville Louisiana River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Louisiana. * WHEN...Until Monday, April 20. * ADDITION...

Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Effective: 2026-04-12T11:41:00-05:00  ·  Expires: 2026-04-13T23:45:00-05:00
Met · Severe · Immediate
Flood Warning issued April 12 at 9:46PM CDT until April 20 at 7:00AM CDT by NWS St Louis MO

...The Flood Warning continues for the following rivers in Illinois...Missouri... Mississippi River at Clarksville. Mississippi River at Louisiana. Mississippi River at Hannibal. River forecasts are based on observed precipitation and forecast precipitation for the next 24 hours. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Mississippi River at Louisiana. *...

Motorists should not attempt to drive around barricades or drive cars through flooded areas. This product, along with additional weather and stream information, is available at https://water.noaa.gov/wfo/lsx

Effective: 2026-04-12T21:46:00-05:00  ·  Expires: 2026-04-14T10:00:00-05:00

Today's Hourly Forecast

24-hour breakdown for Lake Saint Louis, Missouri

12 AM
Partly Cloudy
21°
Partly Cloudy
💧 69% 💨 20.9 km/h
1 AM
Partly Cloudy
21°
Partly Cloudy
💧 73% 💨 20.9 km/h
2 AM
Overcast
21°
Overcast
💧 74% 💨 20.9 km/h
3 AM
Clear
21°
Clear
💧 72% 💨 18 km/h
4 AM
Clear
20°
Clear
💧 77% 💨 17.6 km/h
5 AM
Partly Cloudy
20°
Partly Cloudy
💧 80% 💨 19.8 km/h
6 AM
Partly cloudy
21°
Partly cloudy
💧 73% 💨 21.6 km/h
7 AM
Sunny
20°
Sunny
💧 82% 💨 20.9 km/h
8 AM
Partly Cloudy
21°
Partly Cloudy
💧 79% 💨 21.6 km/h
9 AM
Partly Cloudy
23°
Partly Cloudy
💧 75% 💨 21.6 km/h
10 AM
Partly Cloudy
24°
Partly Cloudy
💧 70% 💨 24.8 km/h
11 AM
Partly Cloudy
25°
Partly Cloudy
💧 66% 💨 26.3 km/h
12 PM
Cloudy
27°
Cloudy
💧 62% 💨 25.9 km/h
1 PM
Partly Cloudy
28°
Partly Cloudy
💧 58% 💨 25.9 km/h
2 PM
Partly Cloudy
29°
Partly Cloudy
💧 54% 💨 26.3 km/h
3 PM
Partly Cloudy
29°
Partly Cloudy
💧 52% 💨 25.2 km/h
4 PM
Sunny
30°
Sunny
💧 50% 💨 24.5 km/h
5 PM
Sunny
27°
Sunny
💧 49% 💨 24.1 km/h
6 PM
Thundery outbreaks in nearby
26°
Thundery outbreaks in nearby
💧 78% 💨 22.3 km/h
7 PM
Overcast
24°
Overcast
💧 73% 💨 25.9 km/h
8 PM
Overcast
24°
Overcast
💧 78% 💨 26.3 km/h
9 PM
Overcast
23°
Overcast
💧 77% 💨 25.2 km/h
10 PM
Cloudy
23°
Cloudy
💧 80% 💨 24.8 km/h
11 PM
Cloudy
23°
Cloudy
💧 75% 💨 26.3 km/h

3-Day Forecast

Daily overview for Lake Saint Louis, Missouri

Today
Partly Cloudy
Partly Cloudy
31° / 19°
🌧️ 0% chance of rain
💧 Avg. humidity: 70%
💨 Max wind: 26.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:29 AM
🌇 Sunset: 07:39 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Patchy rain nearby
Patchy rain nearby
28° / 20°
🌧️ 80% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 29.5 km/h
🌧️ Total precip: 0.11 mm
☀️ UV Index: 2
🌅 Sunrise: 06:28 AM
🌇 Sunset: 07:40 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Overcast
Overcast
22° / 20°
🌧️ 0% chance of rain
💧 Avg. humidity: 79%
💨 Max wind: 31 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 0.8
🌅 Sunrise: 06:26 AM
🌇 Sunset: 07:41 PM
🌙 Waning Crescent
🌑 Moon: 8% lit

Best Time to Visit Lake Saint Louis

Plan your trip to Lake Saint Louis, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Lake Saint Louis 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Lake Saint Louis?
Current conditions in Lake Saint Louis: Partly cloudy, temperature 21°C, humidity 73%.
What is the best time to visit Lake Saint Louis?
The best time to visit Lake Saint Louis is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Lake Saint Louis?
Lake Saint Louis is located at approximately 38.8° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Lake Saint Louis?
The wettest period in Lake Saint Louis is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Lake Saint Louis?
For visits to Lake Saint Louis during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Lake Saint Louis in?
Lake Saint Louis is located in United States, in the state of Missouri.
What are the public holidays in Lake Saint Louis in 2026?
View the 2026 public holidays for Lake Saint Louis on our Holidays page.
What are the GPS coordinates used for the weather forecast in Lake Saint Louis?
The weather forecast for Lake Saint Louis uses coordinates 38.785, -90.7935.