Weather forecast for 10 daysProspect Heights, IL

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 57°F
  • 41°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 9mphSW 224°
  • Humidity: 45%
  • UV index: 4
  • Sunrise: 7:06 am CDT
  • Sunset: 6:07 pm CDT
  • ▼
On Saturday, in Prospect Heights, a crisp, sunny atmosphere is likely.
Temperature fluctuations between a moderate 57.2°F and an icy 41°F are predicted.
Today's top temperature will adhere to the average October high temperature of 59.9°F.
Sunrise was at 7:06 am and sunset will be at 6:07 pm; the daylight will last for 11h and 0min.

Sunday Oct 18, 2026

  • 63°F
  • 41°F
Sunny
Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 14mphSSW 208°
  • Humidity: 49%
  • UV index: 4
  • Sunrise: 7:08 am CDT
  • Sunset: 6:05 pm CDT
  • ▼
Tomorrow, in Prospect Heights, expect sunny weather with a crisp, clear sky.
The maximum temperature will be a breezy 62.6°F, while the minimum expected temperature is a wintry 41°F.
Tomorrow's highest temperature is expected to match the regular high for October at 59.9°F.
Sunrise will be at 7:08 am and sunset at 6:05 pm; tomorrow's daylight will last for 10h and 58min.

10-day overview

Daily temperatures

Maximum temperature: 72°C.
Coldest day: today 57°C.

Chance of precipitation

Highest chance: Monday 26.10. 19%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 57°F
  • 41°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 9mphSW 224°
  • Humidity: 45%
  • UV index: 4
  • Sunrise: 7:06 am CDT
  • Sunset: 6:07 pm CDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 63°F
  • 41°F
Sunny
Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 14mphSSW 208°
  • Humidity: 49%
  • UV index: 4
  • Sunrise: 7:08 am CDT
  • Sunset: 6:05 pm CDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 68°F
  • 43°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 5mphSSW 204°
  • Humidity: 54%
  • UV index: 4
  • Sunrise: 7:09 am CDT
  • Sunset: 6:04 pm CDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 68°F
  • 45°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 6mphESE 104°
  • Humidity: 61%
  • UV index: 4
  • Sunrise: 7:10 am CDT
  • Sunset: 6:02 pm CDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 70°F
  • 46°F
Sunny
Sunny
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 5mphSSW 194°
  • Humidity: 58%
  • UV index: 4
  • Sunrise: 7:11 am CDT
  • Sunset: 6:01 pm CDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 72°F
  • 46°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 5mphSE 140°
  • Humidity: 60%
  • UV index: 4
  • Sunrise: 7:12 am CDT
  • Sunset: 5:59 pm CDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 70°F
  • 48°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 7mphESE 120°
  • Humidity: 62%
  • UV index: 3
  • Sunrise: 7:13 am CDT
  • Sunset: 5:58 pm CDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 70°F
  • 52°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 9mphSSE 149°
  • Humidity: 61%
  • UV index: 3
  • Sunrise: 7:15 am CDT
  • Sunset: 5:56 pm CDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 72°F
  • 54°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 7mphSSW 194°
  • Humidity: 55%
  • UV index: 3
  • Sunrise: 7:16 am CDT
  • Sunset: 5:55 pm CDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 66°F
  • 50°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 19%
  • Precipitation: 0"
  • Wind: 7mphNNE 14°
  • Humidity: 67%
  • UV index: 3
  • Sunrise: 7:17 am CDT
  • Sunset: 5:53 pm CDT
  • ▼
Weather models show that a combination of gloomy and sun-filled weather is forecasted.
Rainfall is not anticipated in Prospect Heights in the upcoming period.
Substantial differences in temperature are forecasted throughout the forecast window. Forecast highs will fluctuate between 57.2°F and 71.6°F, while the variation in nighttime lows will be also notably wide, as the overnight lows will vary from 41°F to 53.6°F.
Thursday and next Sunday, with the highest temperature of 71.6°F, will be the warmest days in Prospect Heights; today is the coldest day, with a maximum temperature of 57.2°F.
Updated: Oct 17, 2026 @ 18:35:40 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Saturday, mostly clear skies and sunshine will create ideal daytime conditions.

Today, the maximum temperature will be 57.2°F, while the minimum temperature will be 41°F.
Today, the highest temperature will be in line with the average maximum temperature in October. The lowest temperature will be relatively lower than the average low of 46.4°F.

On Saturday, in Prospect Heights, sunrise was at 7:06 am and sunset will be at 6:07 pm (CDT).

In Prospect Heights, the length of the day today will be 11h and 0min.

Tomorrow, in Prospect Heights, the outlook remains bright and sunny.

Tomorrow, the highest temperature will be 62.6°F, while the lowest temperature will be 41°F.
Tomorrow, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature tomorrow will be slightly cooler than the average low temperature.

On Sunday, in Prospect Heights, sunrise will be at 7:08 am and sunset at 6:05 pm (CDT).

In Prospect Heights, tomorrow, there will be 10h and 58min of daylight.