Weather forecast for tomorrowCollinsville, IL
Weather forecast for tomorrow
Sunday Oct 18, 2026
- 66°F
- 39°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 9mphSSE 163°
- Humidity: 52%
- UV index: 5
- Sunrise: 7:12 am CDT
- Sunset: 6:17 pm CDT
- details ▼
Tomorrow, on Sunday, October 18, skies are expected to be clear and full of sunshine.
The day will see a remarkable high of a comfortable 66.2°F, sharply contrasting with a low of an icy 39.2°F.
Tomorrow's temperature is forecasted to match October's standard peak of 66°F.
Sunrise will be at 7:12 am and sunset at 6:17 pm; tomorrow's daylight will last for 11h and 5min.
The day will see a remarkable high of a comfortable 66.2°F, sharply contrasting with a low of an icy 39.2°F.
Tomorrow's temperature is forecasted to match October's standard peak of 66°F.
Sunrise will be at 7:12 am and sunset at 6:17 pm; tomorrow's daylight will last for 11h and 5min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 70°C.
Coldest hour: 6 am 39°C.
Coldest hour: 6 am 39°C.
Chance of precipitation
Highest chance: 6 am 5%.
Hourly weather forecast
- 12 am
- 46°F
- Feels like:46°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 2mphSSE 156°
- Humidity: 83%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 43°F
- Feels like:43°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 1mphSSE 159°
- Humidity: 89%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 41°F
- Feels like:41°F
Clear
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 1mphSSE 158°
- Humidity: 93%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 39°F
- Feels like:39°F
Clear
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 0mphSSE 148°
- Humidity: 94%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 7:12 am
- 8 am
- 43°F
- Feels like:43°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 1mphSE 144°
- Humidity: 90%
- Pressure: 30.39"Hg
- Visibility: 9mi
- UV index: 0
- details ▼
- 10 am
- 55°F
- Feels like:55°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 2mphS 169°
- Humidity: 63%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 12 pm
- 64°F
- Feels like:64°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphSSW 200°
- Humidity: 43%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 2 pm
- 70°F
- Feels like:70°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphS 180°
- Humidity: 36%
- Pressure: 30.33"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 4 pm
- 70°F
- Feels like:70°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 4mphSSE 166°
- Humidity: 33%
- Pressure: 30.3"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 64°F
- Feels like:64°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphSE 124°
- Humidity: 42%
- Pressure: 30.27"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:17 pm
- 8 pm
- 55°F
- Feels like:55°F
Partly Cloudy
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 2mphESE 105°
- Humidity: 65%
- Pressure: 30.3"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 52°F
- Feels like:52°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 2mphESE 107°
- Humidity: 75%
- Pressure: 30.3"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, primarily clear and occasionally cloudy weather is predicted.
The temperature will be between the lowest temperature of 39.2°F and the highest temperature of 69.8°F. The warmest part of the day will be from 2 pm to 5 pm.
The highest temperature tomorrow will be resembling October's typical maximum. The lowest temperature tomorrow is more close to November's average minimum of 37.6°F than the average low in October of 48.9°F.
The temperature will be between the lowest temperature of 39.2°F and the highest temperature of 69.8°F. The warmest part of the day will be from 2 pm to 5 pm.
The highest temperature tomorrow will be resembling October's typical maximum. The lowest temperature tomorrow is more close to November's average minimum of 37.6°F than the average low in October of 48.9°F.
Updated: Oct 18, 2026 @ 04:53:22 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, skies will stay clear and sunny.
Tomorrow, the maximum temperature in Collinsville will be 66.2°F, while the minimum temperature will be 39.2°F.
Tomorrow, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature tomorrow will be notably lower than the average low of 48.9°F.
Tomorrow, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature tomorrow will be notably lower than the average low of 48.9°F.
On Sunday, in Collinsville, sunrise will be at 7:12 am and sunset at 6:17 pm (CDT).
Tomorrow, the daylight will last for 11h and 5min.
