Weather forecast for 10 daysLancaster, IL

Weather forecast for the weekend

Saturday Oct 17, 2026

  • min.
  • 36°F
Clear
Clear
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 7mphENE 73°
  • Humidity: 68%
  • UV index: 0
  • Sunrise: 7:02 am CDT
  • Sunset: 6:10 pm CDT
  • ▼
In Lancaster, through the afternoon and beyond, the forecast calls for endless blue skies and perfectly clear weather.
The lowest anticipated temperature is a cold 35.6°F.
Sunrise was at 7:02 am and sunset will be at 6:10 pm; the daylight will last for 11h and 8min.

Sunday Oct 18, 2026

  • 66°F
  • 37°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 6mphSE 137°
  • Humidity: 51%
  • UV index: 5
  • Sunrise: 7:03 am CDT
  • Sunset: 6:09 pm CDT
  • ▼
Tomorrow, on Sunday, October 18, sunny skies and pleasant visibility are also expected.
A considerable disparity in temperature is forecasted, reaching up to a maximum of a comfortable 66.2°F and falling to a minimum of a wintry 37.4°F.
The anticipated daily high is projected to match October's typical maximum of 66.6°F.
Sunrise will be at 7:03 am and sunset at 6:09 pm; tomorrow's daylight will last for 11h and 5min.

10-day overview

Daily temperatures

Warmest period: Sunday - Monday 79°C.
Coldest day: tomorrow 66°C.

Chance of precipitation

Highest chance: tomorrow - Monday 5%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • min.
  • 36°F
Clear
Clear
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 7mphENE 73°
  • Humidity: 68%
  • UV index: 0
  • Sunrise: 7:02 am CDT
  • Sunset: 6:10 pm CDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 66°F
  • 37°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 6mphSE 137°
  • Humidity: 51%
  • UV index: 5
  • Sunrise: 7:03 am CDT
  • Sunset: 6:09 pm CDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 72°F
  • 41°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 2mphESE 117°
  • Humidity: 51%
  • UV index: 5
  • Sunrise: 7:04 am CDT
  • Sunset: 6:07 pm CDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 73°F
  • 43°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 4mphNE 53°
  • Humidity: 50%
  • UV index: 4
  • Sunrise: 7:05 am CDT
  • Sunset: 6:06 pm CDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 75°F
  • 41°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 4mphNE 47°
  • Humidity: 49%
  • UV index: 4
  • Sunrise: 7:06 am CDT
  • Sunset: 6:05 pm CDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 75°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 6mphNNE 28°
  • Humidity: 52%
  • UV index: 4
  • Sunrise: 7:07 am CDT
  • Sunset: 6:03 pm CDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 75°F
  • 45°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 6mphENE 73°
  • Humidity: 49%
  • UV index: 4
  • Sunrise: 7:08 am CDT
  • Sunset: 6:02 pm CDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 77°F
  • 43°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 5mphESE 106°
  • Humidity: 49%
  • UV index: 4
  • Sunrise: 7:09 am CDT
  • Sunset: 6:01 pm CDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 79°F
  • 46°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 5mphSSE 165°
  • Humidity: 51%
  • UV index: 4
  • Sunrise: 7:10 am CDT
  • Sunset: 6:00 pm CDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 79°F
  • 46°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 6mphNE 40°
  • Humidity: 50%
  • UV index: 4
  • Sunrise: 7:11 am CDT
  • Sunset: 5:58 pm CDT
  • ▼
Throughout the next ten days, a combination of sunny and cloud-filled weather is predicted.
Rainfall is not anticipated in Lancaster in the upcoming days.
Temperature fluctuation will be noticeable across the forecast period. Maximum temperatures are forecasted between 66.2°F and 78.8°F, while the lowest temperature will be between 35.6°F and 46.4°F.
With a maximum temperature of 78.8°F, next Sunday and Monday will be the warmest days in Lancaster, Illinois; Sunday will be the coldest day, with the highest temperature of 66.2°F.
Updated: Oct 17, 2026 @ 20:11:04 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Tomorrow, the weather remains calm, bright, and sunny.

Tomorrow, the highest temperature will be 66.2°F, while the lowest temperature will be 37.4°F.
Tomorrow, the highest temperature will be in line with the average maximum temperature in October. The lowest temperature tomorrow will be notably lower than the average low of 49.6°F.

On Sunday, in Lancaster, sunrise will be at 7:03 am and sunset at 6:09 pm (CDT).

Tomorrow, the daylight will last for 11h and 5min.