Weather forecast for tomorrowSullivan, IL
Weather forecast for tomorrow
Sunday Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 9mphS 175°
- Humidity: 47%
- UV index: 4
- Sunrise: 7:07 am CDT
- Sunset: 6:11 pm CDT
- details ▼
Tomorrow, in Sullivan, sunshine will likely continue with scattered clouds at most.
A considerable disparity in temperature is expected, reaching up to a maximum of a comfortable 66.2°F and falling to a minimum of an icy 37.4°F.
The predicted high temperature will align with October's average of 63.9°F.
Sunrise will be at 7:07 am and sunset at 6:11 pm; tomorrow's daylight will last for 11h and 3min.
A considerable disparity in temperature is expected, reaching up to a maximum of a comfortable 66.2°F and falling to a minimum of an icy 37.4°F.
The predicted high temperature will align with October's average of 63.9°F.
Sunrise will be at 7:07 am and sunset at 6:11 pm; tomorrow's daylight will last for 11h and 3min.
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: 6 am 3%.
Hourly weather forecast
- 12 am
- 41°F
- Feels like:39°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 4mphSSE 148°
- Humidity: 72%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 39°F
- Feels like:37°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 4mphSSE 159°
- Humidity: 76%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 37°F
- Feels like:36°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 4mphSSE 162°
- Humidity: 80%
- 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: 30.5"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 7:07 am
- 8 am
- 39°F
- Feels like:36°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 5mphS 169°
- 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: 8mphS 177°
- Humidity: 51%
- 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: 9mphS 184°
- Humidity: 38%
- 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: 9mphS 180°
- Humidity: 32%
- Pressure: 30.42"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 4 pm
- 64°F
- Feels like:64°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphS 176°
- Humidity: 31%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 59°F
- Feels like:59°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphSSE 162°
- Humidity: 41%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:11 pm
- 8 pm
- 52°F
- Feels like:50°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphSSE 148°
- Humidity: 63%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 48°F
- Feels like:46°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 4mphSSE 153°
- Humidity: 71%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, on Sunday, sunshine is expected.
The temperature will vary between a minimum of 37.4°F and a maximum of 64.4°F. The warmest part of the day will be at 3 pm and 4 pm.
Tomorrow, the temperature is forecasted to be close to the usual maximum for October. Tomorrow, expect the temperature to be more alike with the typical minimum for November than for October.
The temperature will vary between a minimum of 37.4°F and a maximum of 64.4°F. The warmest part of the day will be at 3 pm and 4 pm.
Tomorrow, the temperature is forecasted to be close to the usual maximum for October. Tomorrow, expect the temperature to be more alike with the typical minimum for November than for October.
Updated: Oct 17, 2026 @ 18:18:17 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
Tomorrow, in Sullivan, clear and sunny conditions are expected.
Tomorrow, the highest temperature will be 66.2°F, while the lowest temperature will be 37.4°F.
The highest temperature will be in line with the average maximum of 63.9°F in October. The lowest temperature tomorrow will be uncommonly lower than the average low of 48.2°F.
The highest temperature will be in line with the average maximum of 63.9°F in October. The lowest temperature tomorrow will be uncommonly lower than the average low of 48.2°F.
On Sunday, in Sullivan, sunrise will be at 7:07 am and sunset at 6:11 pm (CDT).
In Sullivan, tomorrow, there will be 11h and 3min of daylight.
