Live Weather & Forecast

Weather in Vandalia

Illinois, United States · Real-time conditions & 3-day outlook

Flag of United States
Partly cloudy
24°C
Feels like 26°C
75°F / Feels 78°F
Partly cloudy
Vandalia, Illinois
🌞 Daytime
Updated: 2026-04-13 09:00
💧
Humidity
67%
💨
Wind
23 km/h SSW
🌬️
Wind Gust
31.2 km/h
🌡️
Pressure
1017 mb
👁️
Visibility
16 km
☀️
UV Index
2 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
75%
💦
Dew Point
17.6°C
🌐
Wind Degree
203°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
138.9 μg/m³
NO₂
1.7 μg/m³
O₃
90 μg/m³
SO₂
1.5 μg/m³
PM 2.5
4.5 μg/m³
PM 10
5.2 μg/m³

Today's Hourly Forecast

24-hour breakdown for Vandalia, Illinois

12 AM
Clear
20°
Clear
💧 56% 💨 24.8 km/h
1 AM
Clear
20°
Clear
💧 65% 💨 23.8 km/h
2 AM
Clear
20°
Clear
💧 72% 💨 20.9 km/h
3 AM
Clear
20°
Clear
💧 77% 💨 20.9 km/h
4 AM
Overcast
20°
Overcast
💧 76% 💨 22.3 km/h
5 AM
Clear
20°
Clear
💧 76% 💨 18 km/h
6 AM
Clear
20°
Clear
💧 78% 💨 21.6 km/h
7 AM
Overcast
20°
Overcast
💧 79% 💨 20.5 km/h
8 AM
Overcast
21°
Overcast
💧 79% 💨 20.5 km/h
9 AM
Partly cloudy
24°
Partly cloudy
💧 67% 💨 23 km/h
10 AM
Overcast
23°
Overcast
💧 74% 💨 23.8 km/h
11 AM
Cloudy
24°
Cloudy
💧 70% 💨 28.1 km/h
12 PM
Overcast
25°
Overcast
💧 67% 💨 30.2 km/h
1 PM
Cloudy
26°
Cloudy
💧 64% 💨 30.2 km/h
2 PM
Partly Cloudy
28°
Partly Cloudy
💧 59% 💨 29.9 km/h
3 PM
Sunny
29°
Sunny
💧 55% 💨 29.5 km/h
4 PM
Sunny
28°
Sunny
💧 55% 💨 26.6 km/h
5 PM
Sunny
26°
Sunny
💧 57% 💨 28.1 km/h
6 PM
Thundery outbreaks in nearby
25°
Thundery outbreaks in nearby
💧 79% 💨 27.4 km/h
7 PM
Thundery outbreaks in nearby
24°
Thundery outbreaks in nearby
💧 76% 💨 30.6 km/h
8 PM
Thundery outbreaks in nearby
23°
Thundery outbreaks in nearby
💧 79% 💨 30.2 km/h
9 PM
Thundery outbreaks in nearby
22°
Thundery outbreaks in nearby
💧 81% 💨 29.5 km/h
10 PM
Cloudy
22°
Cloudy
💧 82% 💨 28.8 km/h
11 PM
Thundery outbreaks in nearby
22°
Thundery outbreaks in nearby
💧 82% 💨 27.4 km/h

3-Day Forecast

Daily overview for Vandalia, Illinois

Today
Cloudy
Cloudy
30° / 19°
🌧️ 0% chance of rain
💧 Avg. humidity: 71%
💨 Max wind: 30.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:22 AM
🌇 Sunset: 07:32 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
Thundery outbreaks in nearby
24° / 19°
🌧️ 0% chance of rain
💧 Avg. humidity: 80%
💨 Max wind: 33.1 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:33 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Moderate rain
Moderate rain
23° / 19°
🌧️ 84% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 29.5 km/h
🌧️ Total precip: 8.8 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:19 AM
🌇 Sunset: 07:34 PM
🌙 Waning Crescent
🌑 Moon: 8% lit

Best Time to Visit Vandalia

Plan your trip to Vandalia, 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.
← Back to Vandalia 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Vandalia?
Current conditions in Vandalia: Partly cloudy, temperature 24°C, humidity 67%.
What is the best time to visit Vandalia?
The best time to visit Vandalia is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Vandalia?
Vandalia is located at approximately 39° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Vandalia?
The wettest period in Vandalia is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Vandalia?
For visits to Vandalia during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Vandalia in?
Vandalia is located in United States, in the state of Illinois.
What are the public holidays in Vandalia in 2026?
View the 2026 public holidays for Vandalia on our Holidays page.
What are the GPS coordinates used for the weather forecast in Vandalia?
The weather forecast for Vandalia uses coordinates 38.9606, -89.0937.