Weather forecast for 10 daysSaint Charles, MO
Weather forecast for the weekend
Sunday Oct 18, 2026
- 66°F
- 41°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 8mphSSE 163°
- Humidity: 48%
- UV index: 5
- Sunrise: 7:14 am CDT
- Sunset: 6:19 pm CDT
- details ▼
On Sunday, October 18, clear and sunny conditions are expected.
The highest temperature will be a comfortable 66.2°F, while the lowest predicted temperature is a wintry 41°F.
The expected high for tomorrow will reflect the normal October maximum of 66°F.
Sunrise will be at 7:14 am and sunset at 6:19 pm; tomorrow's daylight will last for 11h and 5min.
The highest temperature will be a comfortable 66.2°F, while the lowest predicted temperature is a wintry 41°F.
The expected high for tomorrow will reflect the normal October maximum of 66°F.
Sunrise will be at 7:14 am and sunset at 6:19 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 - Tuesday 6%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 39°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 4mphSSE 150°
- Humidity: 78%
- UV index: 0
- Sunrise: 7:13 am CDT
- Sunset: 6:20 pm CDT
- details ▼
- Sunday
- Oct 18, 2026
- 66°F
- 41°F
Sunny
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 8mphSSE 163°
- Humidity: 48%
- UV index: 5
- Sunrise: 7:14 am CDT
- Sunset: 6:19 pm CDT
- details ▼
- Monday
- Oct 19, 2026
- 72°F
- 43°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 4mphSSE 162°
- Humidity: 50%
- UV index: 5
- Sunrise: 7:15 am CDT
- Sunset: 6:18 pm CDT
- details ▼
- Tuesday
- Oct 20, 2026
- 73°F
- 45°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 4mphSE 125°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:16 am CDT
- Sunset: 6:16 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 75°F
- 46°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 3mphS 183°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:17 am CDT
- Sunset: 6:15 pm CDT
- details ▼
- Thursday
- Oct 22, 2026
- 77°F
- 46°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 4mphSSE 167°
- Humidity: 52%
- UV index: 4
- Sunrise: 7:18 am CDT
- Sunset: 6:14 pm CDT
- details ▼
- Friday
- Oct 23, 2026
- 79°F
- 50°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphSE 134°
- Humidity: 48%
- UV index: 4
- Sunrise: 7:19 am CDT
- Sunset: 6:12 pm CDT
- details ▼
- Saturday
- Oct 24, 2026
- 81°F
- 52°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphSSE 151°
- Humidity: 48%
- UV index: 4
- Sunrise: 7:20 am CDT
- Sunset: 6:11 pm CDT
- details ▼
- Sunday
- Oct 25, 2026
- 81°F
- 52°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 6mphSSW 202°
- Humidity: 47%
- UV index: 4
- Sunrise: 7:21 am CDT
- Sunset: 6:10 pm CDT
- details ▼
- Monday
- Oct 26, 2026
- 77°F
- 52°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphS 180°
- Humidity: 48%
- UV index: 4
- Sunrise: 7:22 am CDT
- Sunset: 6:08 pm CDT
- details ▼
Over the next ten days, a combination of mostly clear and dull weather is forecasted.
Rain is not predicted in Saint Charles in the upcoming days.
Significant changes in temperature are expected throughout the forecast window. Maximum temperatures are forecasted between 66.2°F and 80.6°F, while there will be also a marked difference in overnight low temperatures, as the overnight lows will vary from 39.2°F to 51.8°F.
The warmest days in Saint Charles will be next Saturday and Sunday, with a maximum of 80.6°F; expect the coldest day on Sunday with a high of 66.2°F.
Rain is not predicted in Saint Charles in the upcoming days.
Significant changes in temperature are expected throughout the forecast window. Maximum temperatures are forecasted between 66.2°F and 80.6°F, while there will be also a marked difference in overnight low temperatures, as the overnight lows will vary from 39.2°F to 51.8°F.
The warmest days in Saint Charles will be next Saturday and Sunday, with a maximum of 80.6°F; expect the coldest day on Sunday with a high of 66.2°F.
Updated: Oct 18, 2026 @ 01:44:52 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, expect sunny weather with a crisp, clear sky.
Tomorrow, the maximum temperature will be 66.2°F, while the minimum temperature will be 41°F.
The highest temperature will be in line with the average maximum of 66°F in October. The lowest temperature will be moderately lower than the average low of 49.5°F.
The highest temperature will be in line with the average maximum of 66°F in October. The lowest temperature will be moderately lower than the average low of 49.5°F.
On Sunday, in Saint Charles, sunrise will be at 7:14 am and sunset at 6:19 pm (CDT).
In Saint Charles, tomorrow, there will be 11h and 5min of daylight.
