Live Weather & Forecast
Weather in Glen Carbon
Illinois, United States · Real-time conditions & 3-day outlook
27°C
Feels like 28°C
81°F / Feels 82°F
Partly cloudy
Glen Carbon, Illinois
🌞 Daytime
Updated: 2026-04-13 15:15
Humidity
54%
Wind
27.7 km/h S
Wind Gust
33.8 km/h
Pressure
1014 mb
Visibility
16 km
UV Index
5.7
(Moderate)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
18.1°C
Wind Degree
185°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
198.9 μg/m³
NO₂
7.9 μg/m³
O₃
74 μg/m³
SO₂
2.6 μg/m³
PM 2.5
4.9 μg/m³
PM 10
5.1 μg/m³
Today's Hourly Forecast
24-hour breakdown for Glen Carbon, Illinois
12 AM
21°
Clear
1 AM
21°
Clear
2 AM
21°
Clear
3 AM
21°
Partly Cloudy
4 AM
20°
Clear
5 AM
20°
Clear
6 AM
20°
Overcast
7 AM
21°
Sunny
8 AM
22°
Overcast
9 AM
22°
Overcast
10 AM
23°
Overcast
11 AM
25°
Partly Cloudy
12 PM
26°
Overcast
1 PM
27°
Overcast
2 PM
28°
Partly Cloudy
3 PM
27°
Partly cloudy
4 PM
30°
Sunny
5 PM
30°
Sunny
6 PM
29°
Sunny
7 PM
28°
Sunny
8 PM
26°
Clear
9 PM
26°
Clear
10 PM
25°
Clear
11 PM
24°
Clear
3-Day Forecast
Daily overview for Glen Carbon, Illinois
Today
Overcast
31°
/
20°
🌧️ 0% chance of rain
💧 Avg. humidity: 64%
💨 Max wind: 29.9 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.9
🌅 Sunrise: 06:26 AM
🌇 Sunset: 07:35 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
26°
/
20°
🌧️ 0% chance of rain
💧 Avg. humidity: 79%
💨 Max wind: 29.9 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:25 AM
🌇 Sunset: 07:36 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Overcast
25°
/
19°
🌧️ 0% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 28.1 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:23 AM
🌇 Sunset: 07:37 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Glen Carbon
Plan your trip to Glen Carbon, 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 Glen Carbon?
Current conditions in Glen Carbon: Partly cloudy, temperature 27°C, humidity 54%.
What is the best time to visit Glen Carbon?
The best time to visit Glen Carbon is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Glen Carbon?
Glen Carbon is located at approximately 38.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Glen Carbon?
The wettest period in Glen Carbon is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Glen Carbon?
For visits to Glen Carbon during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Glen Carbon in?
Glen Carbon is located in United States, in the state of Illinois.
What are the public holidays in Glen Carbon in 2026?
View the 2026 public holidays for Glen Carbon on our Holidays page.
What are the GPS coordinates used for the weather forecast in Glen Carbon?
The weather forecast for Glen Carbon uses coordinates 38.7484, -89.9832.