Weather forecast for 10 daysCollinsville, IL
Weather forecast for the weekend
Sunday Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 8mphSSE 162°
- Humidity: 52%
- UV index: 5
- Sunrise: 7:12 am CDT
- Sunset: 6:17 pm CDT
- details ▼
Tomorrow, clear skies and sunshine are also anticipated.
A wide temperature range is expected, from a high of an enjoyable 66.2°F to a low of an icy 37.4°F.
The maximum temperature for tomorrow is predicted to match the regular October high 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.
A wide temperature range is expected, from a high of an enjoyable 66.2°F to a low of an icy 37.4°F.
The maximum temperature for tomorrow is predicted to match the regular October high 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.
10-day overview
Daily temperatures
Warmest period: Saturday - Sunday 81°C.
Coldest day: tomorrow 66°C.
Coldest day: tomorrow 66°C.
Chance of precipitation
Highest chance: Monday 6%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 37°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 2mphSE 136°
- Humidity: 86%
- UV index: 0
- Sunrise: 7:11 am CDT
- Sunset: 6:19 pm CDT
- details ▼
- Sunday
- Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 8mphSSE 162°
- Humidity: 52%
- UV index: 5
- Sunrise: 7:12 am CDT
- Sunset: 6:17 pm CDT
- details ▼
- Monday
- Oct 19, 2026
- 72°F
- 41°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 4mphSSE 166°
- Humidity: 53%
- UV index: 5
- Sunrise: 7:13 am CDT
- Sunset: 6:16 pm CDT
- details ▼
- Tuesday
- Oct 20, 2026
- 73°F
- 43°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 3mphESE 104°
- Humidity: 51%
- UV index: 4
- Sunrise: 7:14 am CDT
- Sunset: 6:14 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 77°F
- 43°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 2mphSSW 196°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:15 am CDT
- Sunset: 6:13 pm CDT
- details ▼
- Thursday
- Oct 22, 2026
- 77°F
- 43°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 4mphS 176°
- Humidity: 51%
- UV index: 4
- Sunrise: 7:16 am CDT
- Sunset: 6:12 pm CDT
- details ▼
- Friday
- Oct 23, 2026
- 79°F
- 48°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphSE 124°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:17 am CDT
- Sunset: 6:10 pm CDT
- details ▼
- Saturday
- Oct 24, 2026
- 81°F
- 48°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphSSE 149°
- Humidity: 48%
- UV index: 4
- Sunrise: 7:18 am CDT
- Sunset: 6:09 pm CDT
- details ▼
- Sunday
- Oct 25, 2026
- 81°F
- 50°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphSSW 203°
- Humidity: 47%
- UV index: 4
- Sunrise: 7:19 am CDT
- Sunset: 6:08 pm CDT
- details ▼
- Monday
- Oct 26, 2026
- 79°F
- 48°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphSSW 213°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:20 am CDT
- Sunset: 6:07 pm CDT
- details ▼
Conditions over the next ten days suggest that a combination of mostly clear and gloomy weather is expected.
Rainfall is not anticipated in Collinsville in the upcoming days.
Substantial differences in temperature are forecasted in the upcoming days. Forecast highs will fluctuate between 66.2°F and 80.6°F, while the nightly low temperatures will show also a considerable swing, as temperatures overnight will fluctuate from 37.4°F up to 50°F.
The warmest days in Collinsville will be next Saturday and Sunday, with a maximum of 80.6°F; the lowest daytime temperature of the period will be reached on Sunday, peaking at 66.2°F.
Rainfall is not anticipated in Collinsville in the upcoming days.
Substantial differences in temperature are forecasted in the upcoming days. Forecast highs will fluctuate between 66.2°F and 80.6°F, while the nightly low temperatures will show also a considerable swing, as temperatures overnight will fluctuate from 37.4°F up to 50°F.
The warmest days in Collinsville will be next Saturday and Sunday, with a maximum of 80.6°F; the lowest daytime temperature of the period will be reached on Sunday, peaking at 66.2°F.
Updated: Oct 18, 2026 @ 01:44:53 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, in Collinsville, the weather remains calm, bright, and sunny.
Tomorrow, the highest temperature will be 66.2°F, while the lowest temperature will be 37.4°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).
In Collinsville, tomorrow, there will be 11h and 5min of daylight.
