Weather forecast for todayMount Vernon, IL

Weather forecast for today

Current condition 8:32 am CDT

  • 39°F
  • Feels like:
    39°F
Sunny
Sunny
  • Precipitation: 0"
  • Wind: 1mphNW 320°
  • Humidity: 90%
  • Dewpoint: 37°F
  • Pressure: 30.52"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
In Mount Vernon, at the moment, the weather is sunny with a crisp, clear sky.
The temperature is an icy 39.2°F. The current temperature is near the lowest predicted 37.4°F for today.

Sunday Oct 18, 2026

  • 66°F
  • 37°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 7mphSSE 147°
  • Humidity: 49%
  • UV index: 5
  • Sunrise: 7:07 am CDT
  • Sunset: 6:13 pm CDT
  • ▼
Today, on Sunday, October 18, conditions will remain bright with clear skies.
The peak daytime temperature will touch an enjoyable 66.2°F, while the nighttime temperature will descend to a wintry 37.4°F.
Today, the anticipated high will correspond with the regular October temperature of 66.4°F.
Sunrise was at 7:07 am and sunset will be at 6:13 pm; the daylight will last for 11h and 6min.

Hourly overview

Hourly temperatures

Warmest period: 3 pm - 5 pm 64°C.
Minimum temperature: 45°C.

Chance of precipitation

Highest chance: 11 pm 2%.

Hourly weather forecast

  • 9 am
  • 45°F
  • Feels like:
    45°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphSE 141°
  • Humidity: 77%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 10 am
  • 52°F
  • Feels like:
    50°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphSSE 148°
  • Humidity: 60%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 11 am
  • 55°F
  • Feels like:
    55°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSSE 156°
  • Humidity: 49%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 12 pm
  • 59°F
  • Feels like:
    59°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphSSE 152°
  • Humidity: 43%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 5
  • ▼
  • 1 pm
  • 63°F
  • Feels like:
    63°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSSE 152°
  • Humidity: 39%
  • Pressure: 30.45"Hg
  • Visibility: 10mi
  • UV index: 5
  • ▼
  • 2 pm
  • 64°F
  • Feels like:
    64°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSSE 149°
  • Humidity: 36%
  • Pressure: 30.42"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 3 pm
  • 64°F
  • Feels like:
    64°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSSE 147°
  • Humidity: 33%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 4 pm
  • 64°F
  • Feels like:
    64°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSE 146°
  • Humidity: 33%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 5 pm
  • 64°F
  • Feels like:
    64°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphSE 144°
  • Humidity: 33%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 pm
  • 61°F
  • Feels like:
    61°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSE 138°
  • Humidity: 42%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:13 pm
  • 7 pm
  • 54°F
  • Feels like:
    54°F
Clear
Clear
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 2mphESE 119°
  • Humidity: 59%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 pm
  • 50°F
  • Feels like:
    50°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 2mphESE 113°
  • Humidity: 72%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 pm
  • 46°F
  • Feels like:
    46°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 1mphESE 107°
  • Humidity: 79%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 45°F
  • Feels like:
    45°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphESE 116°
  • Humidity: 84%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 11 pm
  • 45°F
  • Feels like:
    45°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphSE 124°
  • Humidity: 87%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, primarily bright and sunny weather is anticipated.
The temperature will vary between a maximum of 64.4°F and a minimum of 44.6°F. The warmest part of the day will be from 2 pm to 5 pm.
Today, the high temperature will be alike with October's average. The lowest temperature is more consistent with November's average minimum of 37.9°F than the usual minimum of 49.1°F in October.
Updated: Oct 18, 2026 @ 13:32:19 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The current temperature (8:32 am CDT) is 39.2°F.

Today, conditions remain stable and sunny, with little cloud presence.

Today, the highest temperature will be 66.2°F, while the lowest temperature will be 37.4°F.
The maximum temperature today will be in line with the average highest temperature in October. Today, the lowest temperature will be notably lower than the average low of 49.1°F.

On Sunday, in Mount Vernon, sunrise was at 7:07 am and sunset will be at 6:13 pm (CDT).

In Mount Vernon, Illinois, today, there will be 11h and 6min of daylight.