Live Weather & Forecast
Weather in Saint Clair
Missouri, United States · Real-time conditions & 3-day outlook
22°C
Feels like 25°C
72°F / Feels 76°F
Overcast
Saint Clair, Missouri
🌙 Nighttime
Updated: 2026-04-13 05:15
Humidity
68%
Wind
21.6 km/h SSW
Wind Gust
34.7 km/h
Pressure
1014 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
25%
Dew Point
16.3°C
Wind Degree
203°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
143.9 μg/m³
NO₂
1.9 μg/m³
O₃
75 μg/m³
SO₂
1.1 μg/m³
PM 2.5
3.4 μg/m³
PM 10
3.6 μg/m³
Today's Hourly Forecast
24-hour breakdown for Saint Clair, Missouri
12 AM
21°
Cloudy
1 AM
20°
Clear
2 AM
20°
Clear
3 AM
20°
Clear
4 AM
19°
Clear
5 AM
22°
Overcast
6 AM
19°
Clear
7 AM
20°
Partly Cloudy
8 AM
21°
Cloudy
9 AM
22°
Partly Cloudy
10 AM
24°
Partly Cloudy
11 AM
25°
Overcast
12 PM
26°
Cloudy
1 PM
27°
Partly Cloudy
2 PM
28°
Partly Cloudy
3 PM
29°
Partly Cloudy
4 PM
30°
Sunny
5 PM
27°
Sunny
6 PM
26°
Thundery outbreaks in nearby
7 PM
24°
Overcast
8 PM
24°
Overcast
9 PM
23°
Thundery outbreaks in nearby
10 PM
23°
Cloudy
11 PM
23°
Thundery outbreaks in nearby
3-Day Forecast
Daily overview for Saint Clair, Missouri
Today
Partly Cloudy
31°
/
18°
🌧️ 0% chance of rain
💧 Avg. humidity: 72%
💨 Max wind: 25.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:31 AM
🌇 Sunset: 07:39 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
27°
/
21°
🌧️ 0% chance of rain
💧 Avg. humidity: 75%
💨 Max wind: 27.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2.1
🌅 Sunrise: 06:29 AM
🌇 Sunset: 07:40 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Patchy rain nearby
23°
/
20°
🌧️ 72% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 27.7 km/h
🌧️ Total precip: 4.14 mm
☀️ UV Index: 0.9
🌅 Sunrise: 06:28 AM
🌇 Sunset: 07:41 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Saint Clair
Plan your trip to Saint Clair, 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.
Frequently Asked Questions
What is the current weather in Saint Clair?
Current conditions in Saint Clair: Overcast, temperature 22°C, humidity 68%.
What is the best time to visit Saint Clair?
The best time to visit Saint Clair is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Saint Clair?
Saint Clair is located at approximately 38.3° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Saint Clair?
The wettest period in Saint Clair is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Saint Clair?
For visits to Saint Clair during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Saint Clair in?
Saint Clair is located in United States, in the state of Missouri.
What are the public holidays in Saint Clair in 2026?
View the 2026 public holidays for Saint Clair on our Holidays page.
What are the GPS coordinates used for the weather forecast in Saint Clair?
The weather forecast for Saint Clair uses coordinates 38.3453, -90.981.