Weather forecast for tomorrowSaint Clair, MO
Weather forecast for tomorrow
Sunday Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 5mphSSE 167°
- Humidity: 54%
- UV index: 5
- Sunrise: 7:16 am CDT
- Sunset: 6:22 pm CDT
- details ▼
On Sunday, in Saint Clair, the forecast calls for abundant sunshine.
The day's temperature range will span from a high of a comfortable 66.2°F to a minimum of an icy 37.4°F.
Tomorrow's peak is predicted to reflect the usual October high temperature of 66.6°F.
Sunrise will be at 7:16 am and sunset at 6:22 pm; tomorrow's daylight will last for 11h and 6min.
The day's temperature range will span from a high of a comfortable 66.2°F to a minimum of an icy 37.4°F.
Tomorrow's peak is predicted to reflect the usual October high temperature of 66.6°F.
Sunrise will be at 7:16 am and sunset at 6:22 pm; tomorrow's daylight will last for 11h and 6min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 70°C.
Coldest hour: 6 am 37°C.
Coldest hour: 6 am 37°C.
Chance of precipitation
Highest chance: 6 am 6%.
Hourly weather forecast
- 12 am
- 45°F
- Feels like:45°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 2mphS 178°
- Humidity: 85%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 43°F
- Feels like:43°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 1mphS 185°
- Humidity: 92%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 39°F
- Feels like:39°F
Clear
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 1mphSSW 195°
- Humidity: 95%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 37°F
- Feels like:37°F
Clear
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 1mphSSW 206°
- Humidity: 97%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 7:16 am
- 8 am
- 41°F
- Feels like:41°F
Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 1mphS 183°
- Humidity: 94%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 55°F
- Feels like:55°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 1mphS 180°
- Humidity: 66%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 12 pm
- 64°F
- Feels like:64°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 1mphS 189°
- 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: 2mphSSE 160°
- Humidity: 36%
- Pressure: 30.3"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 4 pm
- 70°F
- Feels like:70°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphSE 135°
- Humidity: 37%
- Pressure: 30.27"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 64°F
- Feels like:64°F
Mostly Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 2mphESE 107°
- Humidity: 50%
- Pressure: 30.27"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:22 pm
- 8 pm
- 54°F
- Feels like:54°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 2mphESE 102°
- Humidity: 73%
- Pressure: 30.3"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 50°F
- Feels like:50°F
Mostly Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 2mphSE 130°
- Humidity: 84%
- Pressure: 30.3"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, primarily dry and sunny and occasionally cloudy weather is predicted.
The temperature will be between a minimum of 37.4°F and a maximum of 69.8°F. The warmest part of the day will be from 2 pm to 4 pm.
Tomorrow, the high temperature will be alike with October's average. Forecast models suggest a low more resembling November's typical minimum of 37.2°F than October's usual 48.2°F.
The temperature will be between a minimum of 37.4°F and a maximum of 69.8°F. The warmest part of the day will be from 2 pm to 4 pm.
Tomorrow, the high temperature will be alike with October's average. Forecast models suggest a low more resembling November's typical minimum of 37.2°F than October's usual 48.2°F.
Updated: Oct 18, 2026 @ 04:17:17 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, the outlook remains bright and sunny.
Tomorrow, the maximum temperature will be 66.2°F, while the minimum temperature will be 37.4°F.
Tomorrow, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature will be significantly lower than the average low of 48.2°F.
Tomorrow, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature will be significantly lower than the average low of 48.2°F.
On Sunday, in Saint Clair, sunrise will be at 7:16 am and sunset at 6:22 pm (CDT).
Tomorrow, the daylight will last for 11h and 6min.
