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Current weather in Lake St. Louis is clear sky.

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Weather data for Lake St. Louis is updated regularly with the latest available observations and forecasts.

Now · 2:03 AM

Lake St. Louis Weather & Hourly Forecast

United States · Missouri · 63367

60°F

Clear night

Feels like: 58°F

💧 Humidity 81% 🌡 Pressure 30.24 inHg 💨 Wind 5 mph 👁 Visibility 18.5 mi ☁ Clouds 7% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:50 AM 🌇 Sunset 7:00 PM

Hourly Forecast for Lake St. Louis

Today

3:00 AM

Clear night

59° 💧 None 💨 5 mph H 86%30.24 inHg

6:00 AM

Clear night

57° 💧 None 💨 5 mph H 93%30.27 inHg

9:00 AM

Mostly sunny

62° 💧 0.002 in 💨 6 mph H 84%30.30 inHg

12:00 PM

Partly cloudy

68° 💧 0.004 in 💨 9 mph H 65%30.30 inHg

3:00 PM

Overcast

70° 💧 0.001 in 💨 9 mph H 61%30.24 inHg

6:00 PM

Sunny

69° 💧 0.001 in 💨 8 mph H 66%30.24 inHg

9:00 PM

Mostly clear night

63° 💧 None 💨 6 mph H 79%30.27 inHg

Tomorrow

12:00 AM

Mostly cloudy night

63° 💧 None 💨 6 mph H 80%30.27 inHg

3:00 AM

Mostly clear night

60° 💧 None 💨 4 mph H 89%30.24 inHg

6:00 AM

Mostly clear night

58° 💧 None 💨 4 mph H 94%30.27 inHg

9:00 AM

Mostly sunny

63° 💧 0.001 in 💨 7 mph H 82%30.30 inHg

12:00 PM

Overcast

69° 💧 0.004 in 💨 4 mph H 70%30.27 inHg

3:00 PM

Overcast

72° 💧 0.001 in 💨 5 mph H 62%30.21 inHg

6:00 PM

Mostly cloudy

71° 💧 None 💨 4 mph H 65%30.21 inHg

9:00 PM

Mostly clear night

64° 💧 None 💨 3 mph H 84%30.21 inHg

Friday

12:00 AM

Mostly cloudy night

62° 💧 None 💨 3 mph H 90%30.21 inHg

Today

3:00 AM

Clear night

59° 💧 None 💨 5 mph H 86%30.24 inHg

4:00 AM

Clear night

58° 💧 None 💨 5 mph H 88%30.24 inHg

5:00 AM

Clear night

57° 💧 None 💨 4 mph H 91%30.24 inHg

6:00 AM

Clear night

57° 💧 None 💨 5 mph H 93%30.27 inHg

7:00 AM

Sunny

57° 💧 None 💨 5 mph H 95%30.27 inHg

8:00 AM

Sunny

59° 💧 None 💨 5 mph H 91%30.30 inHg

9:00 AM

Mostly sunny

62° 💧 None 💨 6 mph H 84%30.30 inHg

10:00 AM

Partly cloudy

65° 💧 None 💨 8 mph H 74%30.30 inHg

11:00 AM

Mostly cloudy

67° 💧 0.002 in 💨 8 mph H 70%30.30 inHg

12:00 PM

Partly cloudy

68° 💧 0.002 in 💨 9 mph H 65%30.30 inHg

1:00 PM

Mostly cloudy

70° 💧 0.002 in 💨 9 mph H 59%30.27 inHg

2:00 PM

Overcast

71° 💧 None 💨 9 mph H 57%30.27 inHg

3:00 PM

Overcast

70° 💧 0.001 in 💨 9 mph H 61%30.24 inHg

4:00 PM

Mostly cloudy

70° 💧 0.001 in 💨 8 mph H 62%30.24 inHg

5:00 PM

Mostly sunny

70° 💧 None 💨 9 mph H 62%30.24 inHg

6:00 PM

Sunny

69° 💧 0.001 in 💨 8 mph H 66%30.24 inHg

7:00 PM

Mostly clear night

66° 💧 None 💨 5 mph H 72%30.24 inHg

8:00 PM

Mostly clear night

64° 💧 None 💨 5 mph H 78%30.24 inHg

9:00 PM

Mostly clear night

63° 💧 None 💨 6 mph H 79%30.27 inHg

10:00 PM

Mostly clear night

62° 💧 None 💨 5 mph H 81%30.27 inHg

11:00 PM

Mostly cloudy night

61° 💧 None 💨 4 mph H 84%30.27 inHg

Tomorrow

12:00 AM

Mostly cloudy night

63° 💧 None 💨 6 mph H 80%30.27 inHg

1:00 AM

Mostly cloudy night

62° 💧 None 💨 5 mph H 82%30.27 inHg

2:00 AM

Partly cloudy night

62° 💧 None 💨 5 mph H 84%30.27 inHg

3:00 AM

Mostly clear night

60° 💧 None 💨 4 mph H 89%30.24 inHg

4:00 AM

Partly cloudy night

58° 💧 None 💨 3 mph H 92%30.27 inHg

5:00 AM

Mostly cloudy night

58° 💧 None 💨 3 mph H 93%30.24 inHg

6:00 AM

Mostly clear night

58° 💧 None 💨 4 mph H 94%30.27 inHg

7:00 AM

Mostly sunny

57° 💧 None 💨 3 mph H 95%30.27 inHg

8:00 AM

Mostly sunny

60° 💧 None 💨 5 mph H 91%30.27 inHg

9:00 AM

Mostly sunny

63° 💧 None 💨 7 mph H 82%30.30 inHg

10:00 AM

Overcast

66° 💧 None 💨 6 mph H 75%30.27 inHg

11:00 AM

Overcast

67° 💧 0.001 in 💨 5 mph H 71%30.30 inHg

12:00 PM

Overcast

69° 💧 0.002 in 💨 4 mph H 70%30.27 inHg

1:00 PM

Mostly cloudy

70° 💧 0.001 in 💨 5 mph H 66%30.24 inHg

2:00 PM

Overcast

72° 💧 0.001 in 💨 5 mph H 61%30.24 inHg

3:00 PM

Overcast

72° 💧 0.001 in 💨 5 mph H 62%30.21 inHg

4:00 PM

Overcast

72° 💧 None 💨 6 mph H 60%30.21 inHg

5:00 PM

Overcast

72° 💧 None 💨 6 mph H 61%30.21 inHg

6:00 PM

Mostly cloudy

71° 💧 None 💨 4 mph H 65%30.21 inHg

7:00 PM

Mostly clear night

68° 💧 None 💨 2 mph H 76%30.21 inHg

8:00 PM

Mostly clear night

66° 💧 None 💨 2 mph H 80%30.21 inHg

9:00 PM

Mostly clear night

64° 💧 None 💨 3 mph H 84%30.21 inHg

10:00 PM

Mostly clear night

63° 💧 None 💨 3 mph H 87%30.21 inHg

11:00 PM

Mostly clear night

62° 💧 None 💨 3 mph H 89%30.21 inHg

Friday

12:00 AM

Mostly cloudy night

62° 💧 None 💨 3 mph H 90%30.21 inHg

1:00 AM

Mostly clear night

63° 💧 None 💨 3 mph H 89%30.18 inHg

2:00 AM

Partly cloudy night

62° 💧 None 💨 1 mph H 91%30.18 inHg

3:00 AM

Mostly clear night

62° 💧 None 💨 2 mph H 91%30.18 inHg

4:00 AM

Partly cloudy night

61° 💧 None 💨 2 mph H 93%30.18 inHg

5:00 AM

Mostly clear night

61° 💧 None 💨 3 mph H 94%30.21 inHg

6:00 AM

Mostly clear night

61° 💧 None 💨 3 mph H 95%30.21 inHg

7:00 AM

Mostly sunny

60° 💧 None 💨 2 mph H 96%30.21 inHg

8:00 AM

Mostly cloudy

63° 💧 None 💨 3 mph H 93%30.24 inHg

9:00 AM

Mostly cloudy

66° 💧 None 💨 3 mph H 86%30.24 inHg

10:00 AM

Partly cloudy

68° 💧 None 💨 3 mph H 82%30.24 inHg

11:00 AM

Mostly cloudy

71° 💧 0.001 in 💨 3 mph H 72%30.24 inHg

12:00 PM

Mostly cloudy

72° 💧 0.001 in 💨 4 mph H 68%30.24 inHg

1:00 PM

Overcast

72° 💧 0.002 in 💨 4 mph H 67%30.21 inHg

2:00 PM

Overcast

71° 💧 0.001 in 💨 5 mph H 69%30.21 inHg

3:00 PM

Partly cloudy

71° 💧 0.001 in 💨 5 mph H 70%30.18 inHg

4:00 PM

Mostly cloudy

73° 💧 0.001 in 💨 6 mph H 65%30.15 inHg

5:00 PM

Mostly cloudy

72° 💧 None 💨 6 mph H 67%30.15 inHg

6:00 PM

Mostly cloudy

71° 💧 None 💨 7 mph H 71%30.15 inHg

7:00 PM

Mostly cloudy night

69° 💧 None 💨 7 mph H 77%30.15 inHg

10:00 PM

Mostly clear night

66° 💧 None 💨 8 mph H 76%30.15 inHg

Saturday

1:00 AM

Overcast night

62° 💧 None 💨 6 mph H 76%30.15 inHg

4:00 AM

Overcast night

61° 💧 None 💨 5 mph H 75%30.12 inHg

7:00 AM

Overcast

59° 💧 None 💨 4 mph H 81%30.15 inHg

10:00 AM

Overcast

65° 💧 None 💨 5 mph H 65%30.15 inHg

1:00 PM

Overcast

69° 💧 None 💨 6 mph H 58%30.12 inHg

4:00 PM

Partly cloudy

73° 💧 None 💨 8 mph H 48%30.06 inHg

7:00 PM

Mostly clear night

67° 💧 None 💨 6 mph H 59%30.03 inHg

10:00 PM

Mostly clear night

63° 💧 None 💨 6 mph H 68%30.03 inHg

Sunday

1:00 AM

Partly cloudy night

61° 💧 None 💨 4 mph H 73%30.06 inHg

4:00 AM

Mostly clear night

59° 💧 None 💨 5 mph H 78%30.00 inHg

7:00 AM

Partly cloudy

58° 💧 None 💨 4 mph H 81%30.03 inHg

10:00 AM

Partly cloudy

68° 💧 None 💨 3 mph H 59%30.00 inHg

1:00 PM

Partly cloudy

78° 💧 None 💨 3 mph H 48%29.97 inHg

4:00 PM

Sunny

80° 💧 None 💨 4 mph H 47%29.91 inHg

7:00 PM

Mostly clear night

73° 💧 None 💨 6 mph H 59%29.88 inHg

10:00 PM

Mostly clear night

68° 💧 None 💨 4 mph H 60%29.91 inHg

Monday

1:00 AM

Mostly clear night

65° 💧 None 💨 3 mph H 65%29.91 inHg

4:00 AM

Mostly clear night

63° 💧 None 💨 3 mph H 70%29.91 inHg

7:00 AM

Mostly cloudy

61° 💧 None 💨 4 mph H 74%29.88 inHg

10:00 AM

Mostly sunny

73° 💧 None 💨 5 mph H 55%29.88 inHg

1:00 PM

Partly cloudy

83° 💧 None 💨 7 mph H 39%29.83 inHg

7:00 PM

Clear night

82° 💧 None 💨 6 mph H 39%29.91 inHg

Tuesday

1:00 AM

Clear night

75° 💧 None 💨 6 mph H 56%29.83 inHg

7:00 AM

Partly cloudy

69° 💧 None 💨 8 mph H 61%29.85 inHg

1:00 PM

Partly cloudy

66° 💧 None 💨 8 mph H 71%29.85 inHg

7:00 PM

Light rain

77° 💧 None 💨 11 mph H 59%29.80 inHg

Wednesday

1:00 AM

Overcast night

70° 💧 None 💨 10 mph H 88%29.68 inHg

7:00 AM

Light rain

67° 💧 None 💨 5 mph H 98%29.68 inHg

1:00 PM

Moderate rain

68° 💧 None 💨 4 mph H 98%29.65 inHg

7:00 PM

Light rain

72° 💧 None 💨 5 mph H 92%29.65 inHg

Thursday

1:00 AM

Overcast night

68° 💧 None 💨 11 mph H 90%29.65 inHg

7:00 AM

Overcast

66° 💧 None 💨 8 mph H 97%29.68 inHg

1:00 PM

Overcast

66° 💧 None 💨 8 mph H 92%29.68 inHg

7:00 PM

Light rain

72° 💧 None 💨 9 mph H 79%29.71 inHg

Friday

1:00 AM

Mostly cloudy night

70° 💧 None 💨 6 mph H 82%29.74 inHg

7:00 AM

Sunny

64° 💧 None 💨 6 mph H 94%29.83 inHg

1:00 PM

Mostly sunny

60° 💧 None 💨 5 mph H 97%29.88 inHg

7:00 PM

Mostly clear night

77° 💧 None 💨 8 mph H 59%29.88 inHg

Saturday

1:00 AM

Light rain

69° 💧 None 💨 6 mph H 88%29.85 inHg

7:00 AM

Sunny

61° 💧 None 💨 7 mph H 92%29.85 inHg

1:00 PM

Sunny

55° 💧 None 💨 9 mph H 87%29.83 inHg

7:00 PM

Clear night

70° 💧 None 💨 13 mph H 51%29.80 inHg

Sunday

1:00 AM

Overcast night

65° 💧 None 💨 11 mph H 59%29.80 inHg

7:00 AM

Clear night

58° 💧 None 💨 7 mph H 73%29.85 inHg

1:00 PM

Sunny

53° 💧 None 💨 8 mph H 81%29.94 inHg

7:00 PM

Overcast night

63° 💧 None 💨 9 mph H 61%29.97 inHg

Monday

1:00 AM

Mostly cloudy night

60° 💧 None 💨 6 mph H 66%29.97 inHg

7:00 AM

Partly cloudy night

56° 💧 None 💨 6 mph H 77%30.03 inHg

1:00 PM

Sunny

50° 💧 None 💨 3 mph H 91%30.06 inHg

7:00 PM

Mostly clear night

65° 💧 None 💨 2 mph H 60%30.03 inHg

Tuesday

1:00 AM

Mostly clear night

61° 💧 None 💨 4 mph H 75%29.97 inHg

7:00 AM

Overcast night

56° 💧 None 💨 3 mph H 89%30.03 inHg

1:00 PM

Overcast

54° 💧 None 💨 4 mph H 90%30.03 inHg

7:00 PM

Partly cloudy night

68° 💧 None 💨 7 mph H 60%30.00 inHg

Wednesday

1:00 AM

Overcast night

65° 💧 None 💨 6 mph H 73%29.97 inHg

7:00 AM

Mostly cloudy night

61° 💧 None 💨 6 mph H 79%29.97 inHg

1:00 PM

Mostly sunny

57° 💧 None 💨 7 mph H 85%30.00 inHg

In Lake St. Louis and, more broadly, across the state of Missouri: This morning will start with mostly cloudy skies and mild temperatures around 67 degrees. Winds will be light from the northeast at up to 9 mph, with occasional gusts reaching 18 mph. As the day progresses, temperatures are expected to warm into the low 80s, reaching around 83. Rain may develop, with some areas experiencing about 0.08 inches of accumulation. The highest chance of rain is about 85%, so keep an umbrella handy if you're heading outdoors. Winds will remain light during the afternoon, continuing from the northeast at similar speeds. Overall, it looks like a warm, mostly cloudy day with a good likelihood of some rain, especially later in the day.

15-Day Weather Outlook for Lake St. Louis

TomorrowTomorrow

Mostly cloudy 72°/57° 💧 None 💨 7 mph

Friday, Sep 25Fri Sep 25

Mostly cloudy 73°/60° 💧 None 💨 8 mph

Saturday, Sep 26Sat Sep 26

Overcast 73°/59° 💧 0.001 in 💨 8 mph

Sunday, Sep 27Sun Sep 27

Partly cloudy 80°/58° 💧 0.005 in 💨 6 mph

Monday, Sep 28Mon Sep 28

Mostly sunny 83°/61° 💧 0.079 in 💨 7 mph

Tuesday, Sep 29Tue Sep 29

Light rain 77°/66° 💧 0.016 in 💨 11 mph

Wednesday, Sep 30Wed Sep 30

Moderate rain 72°/67° 💧 0.931 in 💨 10 mph

Thursday, Oct 1Thu Oct 1

Light rain 72°/66° 💧 0.532 in 💨 11 mph

Friday, Oct 2Fri Oct 2

Mostly cloudy 77°/60° 💧 0.035 in 💨 8 mph

Saturday, Oct 3Sat Oct 3

Light rain 70°/55° 💧 0.090 in 💨 13 mph

Sunday, Oct 4Sun Oct 4

Overcast 65°/53° 💧 None 💨 11 mph

Monday, Oct 5Mon Oct 5

Mostly cloudy 65°/50° 💧 None 💨 6 mph

Tuesday, Oct 6Tue Oct 6

Mostly sunny 68°/54° 💧 None 💨 7 mph

Wednesday, Oct 7Wed Oct 7

Overcast 65°/57° 💧 None 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Lake St. Louis

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Lake St. Louis

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 3:00 AM

PM2.5 Fine particles Good 4,5µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 5,0µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 49,9µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 2,7µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Lake St. Louis

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 6,2High 😊Good

Tomorrow UV 6,6High 🙂Fair

Friday UV 4,9Moderate 🙂Fair

Saturday UV 1,5Low 🙂Fair

Sunday UV 4,0Moderate 🙂Fair

Monday UV 6,0High —Unavailable

Tuesday UV 5,0Moderate —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,3 9:00 AMUV 1,1 10:00 AMUV 2,6 11:00 AMUV 4,5 12:00 PMUV 5,9 1:00 PMUV 6,2 2:00 PMUV 5,7 3:00 PMUV 4,7 4:00 PMUV 2,9 5:00 PMUV 1,3 6:00 PMUV 0,4

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Lake St. Louis

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · LAKE ST. LOUIS, MISSOURI

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 4:00 AM–5:00 AM.

94/100Best-hour score

BEST TIME TONIGHT 4:00 AM–5:00 AM Astronomical darkness: 8:29 PM–5:23 AM

☁ Cloud cover 6% Real hourly forecast for the best viewing hour.

☾ Moonlight 89% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 66° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min72%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

ACTIVE NOW

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

Explore current conditions and forecasts for other locations.

Forecast data for Lake St. Louis were last refreshed today at 2:03 AM. The current forecast period extends through 25/09/2026 at 12:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.