Weather forecast for tomorrowIlliopolis, IL
Weather forecast for tomorrow
Sunday Oct 18, 2026
- 66°F
- 36°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 11mphS 179°
- Humidity: 48%
- UV index: 4
- Sunrise: 7:10 am CDT
- Sunset: 6:13 pm CDT
- details ▼
Tomorrow, on Sunday, bright and sunny weather is expected.
The day's temperature range will span from a high of an enjoyable 66.2°F to a minimum of a cold 35.6°F.
The maximum temperature for tomorrow is forecasted to match the regular October high of 63.9°F.
Sunrise will be at 7:10 am and sunset at 6:13 pm; tomorrow's daylight will last for 11h and 2min.
The day's temperature range will span from a high of an enjoyable 66.2°F to a minimum of a cold 35.6°F.
The maximum temperature for tomorrow is forecasted to match the regular October high of 63.9°F.
Sunrise will be at 7:10 am and sunset at 6:13 pm; tomorrow's daylight will last for 11h and 2min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 64°C.
Coldest hour: 6 am 37°C.
Coldest hour: 6 am 37°C.
Chance of precipitation
Highest chance: 12 am - 6 am 3%.
Hourly weather forecast
- 12 am
- 41°F
- Feels like:37°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 4mphSSE 156°
- Humidity: 81%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 39°F
- Feels like:36°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 5mphSSE 157°
- Humidity: 81%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 37°F
- Feels like:34°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 5mphSSE 166°
- Humidity: 83%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 37°F
- Feels like:34°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 5mphSSE 166°
- Humidity: 82%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 7:10 am
- 8 am
- 39°F
- Feels like:36°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 5mphSSE 168°
- Humidity: 79%
- Pressure: 30.5"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 52°F
- Feels like:50°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphS 181°
- Humidity: 52%
- Pressure: 30.5"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 12 pm
- 59°F
- Feels like:57°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphS 186°
- Humidity: 39%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 2 pm
- 63°F
- Feels like:63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 10mphS 186°
- Humidity: 33%
- Pressure: 30.42"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 4 pm
- 64°F
- Feels like:63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphS 181°
- Humidity: 33%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 59°F
- Feels like:59°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 7mphSSE 167°
- Humidity: 42%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:13 pm
- 8 pm
- 50°F
- Feels like:48°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 5mphSSE 155°
- Humidity: 63%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 46°F
- Feels like:45°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 6mphSSE 156°
- Humidity: 73%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, bright and mostly sunny weather is expected.
The temperature will be 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 forecasted high will be alike with the typical October maximum of 63.9°F. The lowest temperature is more alike with November's average minimum of 36°F than the usual minimum of 47.8°F in October.
The temperature will be 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 forecasted high will be alike with the typical October maximum of 63.9°F. The lowest temperature is more alike with November's average minimum of 36°F than the usual minimum of 47.8°F in October.
Updated: Oct 17, 2026 @ 20:43:32 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, clear and sunny conditions are expected.
Tomorrow, the maximum temperature in Illiopolis will be 66.2°F, while the minimum temperature will be 35.6°F.
The maximum temperature will be in line with the average highest temperature of 63.9°F in October. The lowest temperature will be significantly lower than the average low of 47.8°F.
The maximum temperature will be in line with the average highest temperature of 63.9°F in October. The lowest temperature will be significantly lower than the average low of 47.8°F.
On Sunday, in Illiopolis, sunrise will be at 7:10 am and sunset at 6:13 pm (CDT).
In Illiopolis, tomorrow, there will be 11h and 2min of daylight.
