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Weather in Lake Saint Louis, United States 🇺🇸

Weather Forecast in Lake Saint Louis

Current Weather in Lake Saint Louis

Air Quality Alert issued July 19 at 2:26AM CDT by NWS St Louis MO
Patchy light rain with thunder
27°C
Feels like 28°C. Patchy light rain with thunder.
🌬️ 11 km/h ENE
💧 85% Humidity
🧭 1013 hPa
👁️ 16.0 km Visibility
☀️ UV Index: 0.0
🌡️ Dew Point: 23°C
🌅 Sunrise: 05:53 AM
🌇 Sunset: 08:25 PM
Map Overlays:

In Lake Saint Louis right now it is 27°C and patchy light rain with thunder, feeling like 28°C. Humidity is 85% with winds around 11 km/h, and the UV index is 0 (low). Over the next few days, temperatures in Lake Saint Louis range from about 22°C to 36°C. ⚠️ Air Quality Alert issued July 19 at 2:26AM CDT by NWS St Louis MO

Hourly Forecast for Lake Saint Louis

21:00
Clear
28°
5%
22:00
Clear
27°
6%
23:00
Clear
27°
7%
00:00
Clear
26°
9%
01:00
Clear
25°
12%
02:00
Clear
25°
12%
03:00
Clear
25°
13%
04:00
Clear
24°
12%
05:00
Clear
24°
12%
06:00
Sunny
23°
13%
07:00
Partly Cloudy
23°
19%
08:00
Sunny
24°
13%
09:00
Partly Cloudy
26°
14%
10:00
Partly Cloudy
28°
13%
11:00
Partly Cloudy
30°
10%
12:00
Patchy rain nearby
32°
17%
13:00
Partly Cloudy
33°
6%
14:00
Partly Cloudy
34°
4%
15:00
Sunny
35°
2%
16:00
Partly Cloudy
36°
2%
17:00
Sunny
35°
2%
18:00
Sunny
34°
3%
19:00
Sunny
32°
5%
20:00
Sunny
30°
6%

14-Day Forecast for Lake Saint Louis

Sun, Jul 19
Sunny Sunny
34° / 24°
Mon, Jul 20
Sunny Sunny
36° / 23°
Tue, Jul 21
Sunny Sunny
34° / 22°
Wed, Jul 22
Partly Cloudy Partly Cloudy
27° / 17°
Thu, Jul 23
Partly Cloudy Partly Cloudy
25° / 17°
Fri, Jul 24
Patchy rain nearby Patchy rain nearby
20° / 17°
Sat, Jul 25
Sunny Sunny
27° / 15°
Sun, Jul 26
Sunny Sunny
32° / 17°
Mon, Jul 27
Sunny Sunny
35° / 20°
Tue, Jul 28
Sunny Sunny
38° / 24°
Wed, Jul 29
Sunny Sunny
33° / 22°
Thu, Jul 30
Sunny Sunny
34° / 21°
Fri, Jul 31
Sunny Sunny
35° / 23°
Sat, Aug 01
Sunny Sunny
33° / 23°

Additional Forecasts for Lake Saint Louis

Air Quality

💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 140.0 μg/m³
O₃ (Ozone) 82.0 μg/m³
NO₂ (Nitrogen Dioxide) 7.6 μg/m³
SO₂ (Sulphur Dioxide) 0.9 μg/m³
PM2.5 (Fine particles) 6.5 μg/m³
PM10 (Coarse particles) 6.9 μg/m³

Historical Weather

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Best Time to Be Outside in Lake Saint Louis Tomorrow

There is no good daylight window left in Lake Saint Louis today. Tomorrow, the most comfortable window looks like 06:00 to 08:00, when it is around 23°C. It should stay dry through that window. No significant rain is expected in the next several hours.

Frequently Asked Questions about Weather in Lake Saint Louis

What is the temperature in Lake Saint Louis right now?

The current temperature in Lake Saint Louis is 27°C (80°F), patchy light rain with thunder (feels like 28°C).

What's the weather like in Lake Saint Louis right now?

Conditions in Lake Saint Louis right now: Patchy light rain with thunder, humidity 85%, wind 11 km/h ENE.

What is today's forecast for Lake Saint Louis?

Today in Lake Saint Louis: high 34°C, low 24°C, sunny. Chance of rain: 7%.

What is the 7-day weather forecast for Lake Saint Louis?

Daily highs and lows for Lake Saint Louis:

  • 2026-07-19: 34°C / 24°C
  • 2026-07-20: 36°C / 23°C
  • 2026-07-21: 34°C / 22°C
  • 2026-07-22: 27°C / 17°C
  • 2026-07-23: 25°C / 17°C
  • 2026-07-24: 20°C / 17°C
  • 2026-07-25: 27°C / 15°C
Is it going to rain in Lake Saint Louis today?

There is a 7% chance of rain in Lake Saint Louis today.

What is the wind speed in Lake Saint Louis right now?

Wind in Lake Saint Louis is currently 11 km/h (7 mph) from the ENE.

What is the UV index in Lake Saint Louis right now?

The UV index in Lake Saint Louis is currently 0 (low). Sun protection is recommended when the index is 3 or higher.

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