Weather forecast for todayFairfield, IL

Weather forecast for today

Current condition 3:28 am CDT

  • 39°F
  • Feels like:
    39°F
Clear
Clear
  • Precipitation: 0"
  • Wind: 0mphWNW 290°
  • Humidity: 86%
  • Dewpoint: 36°F
  • Pressure: 30.49"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
In Fairfield, at the moment, the air is crisp, and the sky remains beautifully clear.
The temperature is an icy 39.2°F. The current temperature is almost at the minimum-expected 37.4°F for today.

Sunday Oct 18, 2026

  • 64°F
  • 37°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 6mphSE 135°
  • Humidity: 60%
  • UV index: 5
  • Sunrise: 7:05 am CDT
  • Sunset: 6:11 pm CDT
  • ▼
On Sunday, October 18, sunshine and minimal clouds are in the outlook.
Temperatures will show considerable variation, extending from a high of an enjoyable 64.4°F to a low of a cold 37.4°F.
Expect the maximum temperature to remain consistent with the typical October high of 66.7°F.
Sunrise will be at 7:05 am and sunset at 6:11 pm; the daylight will last for 11h and 6min.

Hourly overview

Hourly temperatures

Warmest hour: 4 pm 64°C.
Coldest hour: 6 am 37°C.

Chance of precipitation

Highest chance: 2%.

Hourly weather forecast

  • 4 am
  • 39°F
  • Feels like:
    39°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphESE 120°
  • Humidity: 87%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 37°F
  • Feels like:
    37°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphSE 132°
  • Humidity: 90%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:05 am
  • 8 am
  • 41°F
  • Feels like:
    41°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphSE 135°
  • Humidity: 87%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 am
  • 52°F
  • Feels like:
    50°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSE 142°
  • Humidity: 59%
  • Pressure: 30.5"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 12 pm
  • 59°F
  • Feels like:
    59°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSE 139°
  • Humidity: 42%
  • Pressure: 30.47"Hg
  • Visibility: 10mi
  • UV index: 5
  • ▼
  • 2 pm
  • 63°F
  • Feels like:
    63°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 5mphSE 144°
  • Humidity: 35%
  • Pressure: 30.42"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 4 pm
  • 64°F
  • Feels like:
    64°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSE 136°
  • Humidity: 31%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 59°F
  • Feels like:
    59°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphSE 126°
  • Humidity: 41%
  • Pressure: 30.36"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:11 pm
  • 8 pm
  • 52°F
  • Feels like:
    52°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 1mphESE 113°
  • Humidity: 62%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 48°F
  • Feels like:
    48°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 1mphESE 123°
  • Humidity: 72%
  • Pressure: 30.39"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, in Fairfield, bright skies and dry conditions are anticipated.
The temperature will vary between the lowest temperature of 37.4°F and the highest temperature of 64.4°F. The warmest part of the day will be at 3 pm and 4 pm.
The highest temperature today will be in line with October's typical maximum. The minimum temperature will be more in line with November's average low of 38.1°F than October's typical 49.6°F.
Updated: Oct 18, 2026 @ 08:28:57 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The current temperature (3:28 am CDT) is 39.2°F.

Today, the forecast calls for abundant sunshine.

Today, the highest temperature will be 64.4°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 significantly lower than the average low of 49.6°F.

On Sunday, in Fairfield, sunrise will be at 7:05 am and sunset at 6:11 pm (CDT).

In Fairfield, the length of the day today will be 11h and 6min.