Weather forecast for 10 daysHarristown, IL
Weather forecast for the weekend
Sunday Oct 18, 2026
- 64°F
- 37°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 11mphS 179°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:10 am CDT
- Sunset: 6:12 pm CDT
- details ▼
Today, on Sunday, October 18, sunshine is forecasted under mostly clear skies.
A daytime temperature reaching up to a breezy 64.4°F will sharply contrast with a nighttime low of an icy 37.4°F.
Today's highest temperature is expected to match the regular high for October at 64°F.
Sunrise will be at 7:10 am and sunset at 6:12 pm; the daylight will last for 11h and 2min.
A daytime temperature reaching up to a breezy 64.4°F will sharply contrast with a nighttime low of an icy 37.4°F.
Today's highest temperature is expected to match the regular high for October at 64°F.
Sunrise will be at 7:10 am and sunset at 6:12 pm; the daylight will last for 11h and 2min.
10-day overview
Daily temperatures
Warmest day: Sunday 25.10. 79°C.
Coldest day: today 64°C.
Coldest day: today 64°C.
Chance of precipitation
Highest chance: Monday 26.10. 8%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 64°F
- 37°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 11mphS 179°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:10 am CDT
- Sunset: 6:12 pm CDT
- details ▼
- Monday
- Oct 19, 2026
- 70°F
- 39°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 4mphSSE 161°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:11 am CDT
- Sunset: 6:11 pm CDT
- details ▼
- Tuesday
- Oct 20, 2026
- 73°F
- 41°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 4mphE 96°
- Humidity: 48%
- UV index: 4
- Sunrise: 7:12 am CDT
- Sunset: 6:09 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 75°F
- 43°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 3mphS 180°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:13 am CDT
- Sunset: 6:08 pm CDT
- details ▼
- Thursday
- Oct 22, 2026
- 75°F
- 45°F
Mostly Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 4mphESE 107°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:14 am CDT
- Sunset: 6:07 pm CDT
- details ▼
- Friday
- Oct 23, 2026
- 77°F
- 46°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphSE 124°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:15 am CDT
- Sunset: 6:05 pm CDT
- details ▼
- Saturday
- Oct 24, 2026
- 77°F
- 48°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 8mphSSE 148°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:16 am CDT
- Sunset: 6:04 pm CDT
- details ▼
- Sunday
- Oct 25, 2026
- 79°F
- 50°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 7mphSSW 196°
- Humidity: 47%
- UV index: 4
- Sunrise: 7:17 am CDT
- Sunset: 6:03 pm CDT
- details ▼
- Monday
- Oct 26, 2026
- 75°F
- 48°F
Partly Cloudy
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 6mphS 170°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:18 am CDT
- Sunset: 6:01 pm CDT
- details ▼
- Tuesday
- Oct 27, 2026
- 73°F
- 50°F
Mostly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 6mphSE 136°
- Humidity: 50%
- UV index: 3
- Sunrise: 7:19 am CDT
- Sunset: 6:00 pm CDT
- details ▼
A combination of dry and sunny and gloomy weather is expected.
Rain is not predicted in Harristown in the upcoming days.
Temperature differences will be noticeable across the forecast period. Highs will range from 64.4°F to 78.8°F, while there will be also a marked difference in overnight low temperatures, as the overnight lows will vary from 37.4°F to 50°F.
Expect the warmest day on next Sunday, with temperatures peaking at 78.8°F; today is the coldest day, with a maximum temperature of 64.4°F.
Rain is not predicted in Harristown in the upcoming days.
Temperature differences will be noticeable across the forecast period. Highs will range from 64.4°F to 78.8°F, while there will be also a marked difference in overnight low temperatures, as the overnight lows will vary from 37.4°F to 50°F.
Expect the warmest day on next Sunday, with temperatures peaking at 78.8°F; today is the coldest day, with a maximum temperature of 64.4°F.
Updated: Oct 18, 2026 @ 05:20:06 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Sunday, sunshine is expected with little to no cloud cover.
Today, the maximum temperature in Harristown will be 64.4°F, while the minimum temperature will be 37.4°F.
Today, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature will be uncommonly lower than the average low of 48°F.
Today, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature will be uncommonly lower than the average low of 48°F.
On Sunday, in Harristown, sunrise will be at 7:10 am and sunset at 6:12 pm (CDT).
In Harristown, today, there will be 11h and 2min of daylight.
