What is the weather in Lake St. Louis right now?

Current weather in Lake St. Louis is clear sky.

Where can I find the hourly weather forecast for Lake St. Louis?

This page shows hourly weather forecast for Lake St. Louis, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Lake St. Louis updated regularly?

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

Now · 12:59 PM

Lake St. Louis Weather & Hourly Forecast

United States · Missouri · 63367

83°F

Sunny

Feels like: 84°F

💧 Humidity 48% 🌡 Pressure 30.06 inHg 💨 Wind 6 mph 👁 Visibility 25.3 mi ☁ Clouds 2% ☀️ UV index 7.5 · High 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Lake St. Louis

Today

1:00 PM

Sunny

83° 💧 None 💨 6 mph H 48%30.06 inHg

4:00 PM

Sunny

86° 💧 None 💨 7 mph H 38%30.00 inHg

7:00 PM

Sunny

81° 💧 None 💨 7 mph H 44%30.00 inHg

10:00 PM

Clear night

75° 💧 None 💨 6 mph H 51%30.06 inHg

Tomorrow

1:00 AM

Mostly clear night

72° 💧 None 💨 5 mph H 57%30.06 inHg

4:00 AM

Mostly cloudy night

68° 💧 None 💨 5 mph H 68%30.06 inHg

7:00 AM

Mostly cloudy

67° 💧 None 💨 4 mph H 75%30.09 inHg

10:00 AM

Partly cloudy

80° 💧 None 💨 5 mph H 52%30.09 inHg

1:00 PM

Mostly sunny

90° 💧 None 💨 4 mph H 36%30.06 inHg

4:00 PM

Sunny

94° 💧 None 💨 4 mph H 34%30.00 inHg

7:00 PM

Mostly sunny

88° 💧 None 💨 6 mph H 43%30.00 inHg

10:00 PM

Mostly clear night

82° 💧 None 💨 7 mph H 46%30.03 inHg

Wednesday

1:00 AM

Clear night

79° 💧 None 💨 8 mph H 56%30.03 inHg

4:00 AM

Clear night

77° 💧 None 💨 9 mph H 59%30.03 inHg

7:00 AM

Sunny

78° 💧 None 💨 9 mph H 56%30.03 inHg

10:00 AM

Sunny

89° 💧 None 💨 9 mph H 44%30.03 inHg

Today

1:00 PM

Sunny

83° 💧 None 💨 6 mph H 48%30.06 inHg

2:00 PM

Sunny

85° 💧 None 💨 7 mph H 44%30.03 inHg

3:00 PM

Sunny

86° 💧 None 💨 7 mph H 40%30.03 inHg

4:00 PM

Sunny

86° 💧 None 💨 7 mph H 38%30.00 inHg

5:00 PM

Mostly sunny

85° 💧 None 💨 8 mph H 37%30.00 inHg

6:00 PM

Mostly sunny

84° 💧 None 💨 8 mph H 39%30.00 inHg

7:00 PM

Sunny

81° 💧 None 💨 7 mph H 44%30.00 inHg

8:00 PM

Clear night

78° 💧 None 💨 7 mph H 46%30.03 inHg

9:00 PM

Clear night

77° 💧 None 💨 6 mph H 49%30.06 inHg

10:00 PM

Clear night

75° 💧 None 💨 6 mph H 51%30.06 inHg

11:00 PM

Clear night

74° 💧 None 💨 6 mph H 52%30.06 inHg

Tomorrow

12:00 AM

Clear night

73° 💧 None 💨 6 mph H 54%30.06 inHg

1:00 AM

Mostly clear night

72° 💧 None 💨 5 mph H 57%30.06 inHg

2:00 AM

Mostly cloudy night

70° 💧 None 💨 5 mph H 61%30.06 inHg

3:00 AM

Partly cloudy night

69° 💧 None 💨 5 mph H 65%30.06 inHg

4:00 AM

Mostly cloudy night

68° 💧 None 💨 5 mph H 68%30.06 inHg

5:00 AM

Mostly cloudy night

68° 💧 None 💨 4 mph H 71%30.06 inHg

6:00 AM

Mostly cloudy night

67° 💧 None 💨 4 mph H 74%30.09 inHg

7:00 AM

Mostly cloudy

67° 💧 None 💨 4 mph H 75%30.09 inHg

8:00 AM

Mostly cloudy

70° 💧 None 💨 4 mph H 70%30.09 inHg

9:00 AM

Sunny

75° 💧 None 💨 4 mph H 61%30.09 inHg

10:00 AM

Partly cloudy

80° 💧 None 💨 5 mph H 52%30.09 inHg

11:00 AM

Mostly sunny

84° 💧 None 💨 5 mph H 46%30.09 inHg

12:00 PM

Sunny

88° 💧 None 💨 4 mph H 40%30.09 inHg

1:00 PM

Mostly sunny

90° 💧 None 💨 4 mph H 36%30.06 inHg

2:00 PM

Partly cloudy

92° 💧 None 💨 4 mph H 35%30.03 inHg

3:00 PM

Mostly sunny

94° 💧 None 💨 4 mph H 34%30.00 inHg

4:00 PM

Sunny

94° 💧 None 💨 4 mph H 34%30.00 inHg

5:00 PM

Sunny

94° 💧 None 💨 5 mph H 35%30.00 inHg

6:00 PM

Mostly sunny

92° 💧 None 💨 5 mph H 38%30.00 inHg

7:00 PM

Mostly sunny

88° 💧 None 💨 6 mph H 43%30.00 inHg

8:00 PM

Clear night

85° 💧 None 💨 7 mph H 43%30.00 inHg

9:00 PM

Clear night

83° 💧 None 💨 7 mph H 43%30.00 inHg

10:00 PM

Mostly clear night

82° 💧 None 💨 7 mph H 46%30.03 inHg

11:00 PM

Partly cloudy night

81° 💧 None 💨 7 mph H 50%30.03 inHg

Wednesday

12:00 AM

Clear night

80° 💧 None 💨 8 mph H 54%30.03 inHg

1:00 AM

Clear night

79° 💧 None 💨 8 mph H 56%30.03 inHg

2:00 AM

Clear night

78° 💧 None 💨 9 mph H 57%30.00 inHg

3:00 AM

Clear night

78° 💧 None 💨 9 mph H 59%30.00 inHg

4:00 AM

Clear night

77° 💧 None 💨 9 mph H 59%30.03 inHg

5:00 AM

Clear night

77° 💧 None 💨 9 mph H 58%30.03 inHg

6:00 AM

Clear night

77° 💧 None 💨 9 mph H 57%30.03 inHg

7:00 AM

Sunny

78° 💧 None 💨 9 mph H 56%30.03 inHg

8:00 AM

Sunny

80° 💧 None 💨 9 mph H 54%30.03 inHg

9:00 AM

Sunny

84° 💧 None 💨 9 mph H 50%30.03 inHg

10:00 AM

Sunny

89° 💧 None 💨 9 mph H 44%30.03 inHg

11:00 AM

Sunny

93° 💧 None 💨 9 mph H 41%30.03 inHg

12:00 PM

Sunny

96° 💧 None 💨 9 mph H 41%30.03 inHg

1:00 PM

Light thunderstorms

92° 💧 0.043 in 💨 11 mph H 51%30.00 inHg

2:00 PM

Light rain

92° 💧 0.033 in 💨 7 mph H 51%29.97 inHg

3:00 PM

Light thunderstorms

94° 💧 0.007 in 💨 7 mph H 47%29.97 inHg

4:00 PM

Light thunderstorms

87° 💧 0.029 in 💨 9 mph H 64%29.97 inHg

5:00 PM

Light thunderstorms

86° 💧 0.028 in 💨 4 mph H 70%29.97 inHg

6:00 PM

Mostly sunny

87° 💧 0.002 in 💨 2 mph H 66%29.97 inHg

7:00 PM

Mostly sunny

85° 💧 None 💨 1 mph H 75%29.94 inHg

Thursday

4:00 AM

Overcast night

75° 💧 None 💨 0 mph H 99%29.97 inHg

7:00 AM

Moderate rain

73° 💧 None 💨 3 mph H 99%30.00 inHg

10:00 AM

Light rain

75° 💧 None 💨 5 mph H 93%30.00 inHg

1:00 PM

Overcast

78° 💧 None 💨 4 mph H 82%29.97 inHg

4:00 PM

Overcast

81° 💧 None 💨 2 mph H 74%29.91 inHg

7:00 PM

Mostly cloudy

76° 💧 None 💨 0 mph H 88%29.91 inHg

10:00 PM

Mostly cloudy night

73° 💧 None 💨 3 mph H 94%29.94 inHg

Friday

1:00 AM

Overcast night

71° 💧 None 💨 5 mph H 90%29.97 inHg

4:00 AM

Partly cloudy night

69° 💧 None 💨 3 mph H 92%29.97 inHg

7:00 AM

Overcast

68° 💧 None 💨 4 mph H 93%29.97 inHg

10:00 AM

Mostly cloudy

76° 💧 None 💨 6 mph H 76%29.94 inHg

1:00 PM

Mostly cloudy

83° 💧 None 💨 5 mph H 62%29.91 inHg

4:00 PM

Mostly cloudy

85° 💧 None 💨 2 mph H 56%29.85 inHg

7:00 PM

Mostly sunny

80° 💧 None 💨 1 mph H 75%29.83 inHg

10:00 PM

Partly cloudy night

77° 💧 None 💨 6 mph H 76%29.85 inHg

Saturday

1:00 AM

Mostly clear night

75° 💧 None 💨 5 mph H 83%29.83 inHg

4:00 AM

Light rain

73° 💧 None 💨 9 mph H 91%29.85 inHg

7:00 AM

Light rain

71° 💧 None 💨 6 mph H 97%29.88 inHg

10:00 AM

Overcast

75° 💧 None 💨 6 mph H 89%29.94 inHg

1:00 PM

Overcast

80° 💧 None 💨 6 mph H 75%29.94 inHg

4:00 PM

Partly cloudy

82° 💧 None 💨 6 mph H 67%29.94 inHg

7:00 PM

Mostly sunny

78° 💧 None 💨 4 mph H 79%29.97 inHg

10:00 PM

Mostly clear night

74° 💧 None 💨 5 mph H 91%30.03 inHg

Sunday

1:00 AM

Clear night

71° 💧 None 💨 4 mph H 94%30.06 inHg

7:00 AM

Mostly cloudy

77° 💧 None 💨 5 mph H 92%30.00 inHg

1:00 PM

Partly cloudy

74° 💧 None 💨 1 mph H 99%30.06 inHg

7:00 PM

Mostly sunny

86° 💧 None 💨 5 mph H 66%30.06 inHg

Monday

1:00 AM

Overcast night

83° 💧 None 💨 6 mph H 75%30.00 inHg

7:00 AM

Mostly cloudy

77° 💧 None 💨 7 mph H 80%30.03 inHg

1:00 PM

Sunny

75° 💧 None 💨 7 mph H 88%30.00 inHg

7:00 PM

Mostly sunny

91° 💧 None 💨 10 mph H 56%29.94 inHg

Tuesday

1:00 AM

Clear night

86° 💧 None 💨 10 mph H 66%29.85 inHg

7:00 AM

Sunny

82° 💧 None 💨 10 mph H 71%29.91 inHg

1:00 PM

Sunny

72° 💧 None 💨 9 mph H 77%30.06 inHg

7:00 PM

Partly cloudy

77° 💧 None 💨 8 mph H 51%30.15 inHg

Wednesday

1:00 AM

Clear night

72° 💧 None 💨 7 mph H 61%30.15 inHg

7:00 AM

Partly cloudy

65° 💧 None 💨 6 mph H 77%30.24 inHg

1:00 PM

Sunny

61° 💧 None 💨 6 mph H 87%30.33 inHg

7:00 PM

Mostly sunny

74° 💧 None 💨 7 mph H 50%30.36 inHg

Thursday

1:00 AM

Clear night

69° 💧 None 💨 7 mph H 58%30.30 inHg

7:00 AM

Partly cloudy

62° 💧 None 💨 6 mph H 74%30.39 inHg

1:00 PM

Partly cloudy

58° 💧 None 💨 4 mph H 86%30.36 inHg

7:00 PM

Mostly cloudy

73° 💧 None 💨 6 mph H 51%30.36 inHg

Friday

1:00 AM

Overcast night

69° 💧 None 💨 4 mph H 64%30.30 inHg

7:00 AM

Partly cloudy

60° 💧 None 💨 5 mph H 81%30.33 inHg

1:00 PM

Mostly sunny

55° 💧 None 💨 3 mph H 92%30.33 inHg

7:00 PM

Mostly cloudy

72° 💧 None 💨 3 mph H 43%30.30 inHg

Saturday

1:00 AM

Overcast night

69° 💧 None 💨 3 mph H 58%30.18 inHg

7:00 AM

Mostly cloudy

61° 💧 None 💨 4 mph H 74%30.21 inHg

1:00 PM

Partly cloudy

60° 💧 None 💨 2 mph H 84%30.18 inHg

7:00 PM

Mostly sunny

75° 💧 None 💨 3 mph H 50%30.18 inHg

Sunday

1:00 AM

Clear night

71° 💧 None 💨 2 mph H 63%30.09 inHg

7:00 AM

Sunny

64° 💧 None 💨 1 mph H 78%30.09 inHg

1:00 PM

Partly cloudy

59° 💧 None 💨 2 mph H 94%30.06 inHg

7:00 PM

Overcast

80° 💧 None 💨 5 mph H 38%30.03 inHg

Monday

1:00 AM

Overcast night

74° 💧 None 💨 2 mph H 52%29.94 inHg

7:00 AM

Light rain

65° 💧 None 💨 4 mph H 92%30.00 inHg

1:00 PM

Moderate rain

65° 💧 None 💨 2 mph H 98%30.00 inHg

7:00 PM

Overcast

71° 💧 None 💨 6 mph H 80%30.00 inHg

Tuesday

1:00 AM

Overcast night

69° 💧 None 💨 3 mph H 85%29.94 inHg

In Lake St. Louis and, more broadly, across the state of Missouri: The rest of the day will be mostly sunny with just a few clouds passing through. Temperatures are expected to remain hot, ranging from around 80 to 88 degrees Fahrenheit. Winds will be moderate, coming from the east at speeds up to 10 mph, with gusts reaching as high as 27 mph. No precipitation is expected, so outdoor activities can continue without concern for rain. As the afternoon progresses, expect the warmth to persist, with breezy conditions continuing to provide some relief from the heat. Overall, it looks like a warm and mostly clear day ahead.

15-Day Weather Outlook for Lake St. Louis

TomorrowTomorrow

Mostly sunny 94°/67° 💧 None 💨 7 mph

Wednesday, Sep 9Wed Sep 9

Light thunderstorms 96°/77° 💧 None 💨 11 mph

Thursday, Sep 10Thu Sep 10

Moderate rain 85°/73° 💧 0.569 in 💨 5 mph

Friday, Sep 11Fri Sep 11

Mostly cloudy 85°/68° 💧 0.026 in 💨 6 mph

Saturday, Sep 12Sat Sep 12

Light rain 82°/71° 💧 0.171 in 💨 9 mph

Sunday, Sep 13Sun Sep 13

Partly cloudy 78°/71° 💧 0.712 in 💨 5 mph

Monday, Sep 14Mon Sep 14

Mostly sunny 86°/75° 💧 0.018 in 💨 7 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 91°/72° 💧 0.009 in 💨 10 mph

Wednesday, Sep 16Wed Sep 16

Partly cloudy 77°/61° 💧 None 💨 8 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 74°/58° 💧 None 💨 7 mph

Friday, Sep 18Fri Sep 18

Mostly cloudy 73°/55° 💧 None 💨 6 mph

Saturday, Sep 19Sat Sep 19

Mostly cloudy 72°/60° 💧 None 💨 4 mph

Sunday, Sep 20Sun Sep 20

Mostly sunny 75°/59° 💧 None 💨 3 mph

Monday, Sep 21Mon Sep 21

Moderate rain 80°/65° 💧 0.278 in 💨 5 mph

Tuesday, Sep 22Tue Sep 22

Overcast 71°/69° 💧 0.156 in 💨 6 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

Fair

Nearest forecast value 1:00 PM

PM2.5 Fine particles Good 6,9µg/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 7,6µg/m³

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

O₃ Ozone Fair 83,8µg/m³

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

NO₂ Nitrogen dioxide Good 0,5µg/m³

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

Air quality is acceptable for most people.

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 8,2Very high 🙂Fair

Tomorrow UV 7,5High 🙂Fair

Wednesday UV 7,5High 🙂Fair

Thursday UV 5,8Moderate 😊Good

Friday UV 8,0Very high 😊Good

Saturday UV 8,0Very high —Unavailable

Sunday UV 9,0Very high —Unavailable

Hourly UV index today

1:00 PMUV 8,2 2:00 PMUV 7,7 3:00 PMUV 6,0 4:00 PMUV 3,9 5:00 PMUV 1,9 6:00 PMUV 0,6 7:00 PMUV 0,0

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

Very high UV risk

Use SPF 50+ sunscreen, a hat and sunglasses. Seek shade and limit exposure around midday.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure.

Best in the morning or late in the day

For walking, running or cycling, prefer the early morning or late afternoon.

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: 12:00 AM–1:00 AM.

99/100Best-hour score

BEST TIME TONIGHT 12:00 AM–1:00 AM Astronomical darkness: 8:56 PM–5:07 AM

☁ Cloud cover 2% Real hourly forecast for the best viewing hour.

☾ Moonlight 14% Waning Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 33° high at the best hour.

✦ Estimated visible meteors 1–3/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min59%

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

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

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

UPCOMING

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

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 12:59 PM. The current forecast period extends through 09/09/2026 at 10:00 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.