Live Weather & Forecast
Weather in Mount Vernon
Illinois, United States · Real-time conditions & 3-day outlook
24°C
Feels like 25°C
75°F / Feels 77°F
Sunny
Mount Vernon, Illinois
🌞 Daytime
Updated: 2026-04-12 11:30
Humidity
55%
Wind
28.1 km/h SSW
Wind Gust
35.9 km/h
Pressure
1020 mb
Visibility
16 km
UV Index
5
(Moderate)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
15.5°C
Wind Degree
201°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
147.9 μg/m³
NO₂
1.9 μg/m³
O₃
110 μg/m³
SO₂
1.7 μg/m³
PM 2.5
5.8 μg/m³
PM 10
6.5 μg/m³
Weather Alerts 1
Met
· Moderate · Expected
Special Weather Statement issued April 12 at 12:21AM CDT by NWS Paducah KY
Elevated conditions for wildfires are expected this afternoon, mainly between 12 PM and 7 PM CDT. Relative humidity values will fall to 25 to 35% this afternoon, and winds will be breezy from the south, sustained at 10 to 15 mph with gusts of 25 to 30 mph forecast. Vegetation is dry due to ongoing moderate to severe drought conditions over much of the region. Outdoor burning and activities that i...
Today's Hourly Forecast
24-hour breakdown for Mount Vernon, Illinois
12 AM
17°
Clear
1 AM
16°
Clear
2 AM
16°
Clear
3 AM
16°
Clear
4 AM
16°
Clear
5 AM
15°
Clear
6 AM
15°
Clear
7 AM
17°
Sunny
8 AM
19°
Sunny
9 AM
21°
Sunny
10 AM
24°
Sunny
11 AM
24°
Sunny
12 PM
28°
Sunny
1 PM
28°
Sunny
2 PM
28°
Sunny
3 PM
28°
Sunny
4 PM
27°
Sunny
5 PM
26°
Partly Cloudy
6 PM
24°
Overcast
7 PM
23°
Overcast
8 PM
22°
Overcast
9 PM
21°
Cloudy
10 PM
21°
Overcast
11 PM
21°
Overcast
3-Day Forecast
Daily overview for Mount Vernon, Illinois
Today
Sunny
29°
/
15°
🌧️ 0% chance of rain
💧 Avg. humidity: 63%
💨 Max wind: 31.7 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:24 AM
🌇 Sunset: 07:29 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Overcast
26°
/
19°
🌧️ 0% chance of rain
💧 Avg. humidity: 70%
💨 Max wind: 33.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:22 AM
🌇 Sunset: 07:30 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Overcast
26°
/
20°
🌧️ 0% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 36.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:31 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Mount Vernon
Plan your trip to Mount Vernon, 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 Mount Vernon?
Current conditions in Mount Vernon: Sunny, temperature 24°C, humidity 55%.
What is the best time to visit Mount Vernon?
The best time to visit Mount Vernon is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Mount Vernon?
Mount Vernon is located at approximately 38.3° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Mount Vernon?
The wettest period in Mount Vernon is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Mount Vernon?
For visits to Mount Vernon during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Mount Vernon in?
Mount Vernon is located in United States, in the state of Illinois.
What are the public holidays in Mount Vernon in 2026?
View the 2026 public holidays for Mount Vernon on our Holidays page.
What are the GPS coordinates used for the weather forecast in Mount Vernon?
The weather forecast for Mount Vernon uses coordinates 38.3173, -88.9031.