Weather forecast for 10 daysO'Fallon, MO
Weather forecast for the weekend
Saturday Oct 17, 2026
- 61°F
- 37°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphNE 42°
- Humidity: 45%
- UV index: 5
- Sunrise: 7:14 am CDT
- Sunset: 6:21 pm CDT
- details ▼
Today, on Saturday, October 17, sunny and dry conditions are anticipated.
Temperatures will oscillate between an enjoyable 60.8°F at their highest and a cold 37.4°F at their lowest.
Today, the maximum temperature is anticipated to be a couple of degrees lower than October's climate norm of 66.2°F.
Sunrise was at 7:14 am and sunset will be at 6:21 pm; the daylight will last for 11h and 7min.
Temperatures will oscillate between an enjoyable 60.8°F at their highest and a cold 37.4°F at their lowest.
Today, the maximum temperature is anticipated to be a couple of degrees lower than October's climate norm of 66.2°F.
Sunrise was at 7:14 am and sunset will be at 6:21 pm; the daylight will last for 11h and 7min.
Sunday Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphSSE 166°
- Humidity: 51%
- UV index: 5
- Sunrise: 7:15 am CDT
- Sunset: 6:20 pm CDT
- details ▼
Tomorrow, expect bright skies and plenty of sunshine.
Substantial temperature variations are expected, soaring to a maximum of an enjoyable 66.2°F and descending to a minimum of a cold 37.4°F.
The maximum temperature tomorrow is anticipated to reflect October's average high of 66.2°F.
Sunrise will be at 7:15 am and sunset at 6:20 pm; tomorrow's daylight will last for 11h and 5min.
Substantial temperature variations are expected, soaring to a maximum of an enjoyable 66.2°F and descending to a minimum of a cold 37.4°F.
The maximum temperature tomorrow is anticipated to reflect October's average high of 66.2°F.
Sunrise will be at 7:15 am and sunset at 6:20 pm; tomorrow's daylight will last for 11h and 5min.
10-day overview
Daily temperatures
Warmest period: Friday - Sunday 81°C.
Coldest day: today 61°C.
Coldest day: today 61°C.
Chance of precipitation
Highest chance: Monday 26.10. 20%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- 61°F
- 37°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 3mphNE 42°
- Humidity: 45%
- UV index: 5
- Sunrise: 7:14 am CDT
- Sunset: 6:21 pm CDT
- details ▼
- Sunday
- Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphSSE 166°
- Humidity: 51%
- UV index: 5
- Sunrise: 7:15 am CDT
- Sunset: 6:20 pm CDT
- details ▼
- Monday
- Oct 19, 2026
- 72°F
- 41°F
Partly Cloudy
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 4mphSSE 162°
- Humidity: 54%
- UV index: 5
- Sunrise: 7:16 am CDT
- Sunset: 6:18 pm CDT
- details ▼
- Tuesday
- Oct 20, 2026
- 73°F
- 43°F
Partly Cloudy
- Precip. probability: 9%
- Precipitation: 0"
- Wind: 4mphSE 145°
- Humidity: 53%
- UV index: 4
- Sunrise: 7:17 am CDT
- Sunset: 6:17 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 77°F
- 45°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 3mphS 187°
- Humidity: 53%
- UV index: 4
- Sunrise: 7:18 am CDT
- Sunset: 6:16 pm CDT
- details ▼
- Thursday
- Oct 22, 2026
- 79°F
- 45°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 4mphS 179°
- Humidity: 52%
- UV index: 4
- Sunrise: 7:19 am CDT
- Sunset: 6:14 pm CDT
- details ▼
- Friday
- Oct 23, 2026
- 81°F
- 46°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphSE 134°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:20 am CDT
- Sunset: 6:13 pm CDT
- details ▼
- Saturday
- Oct 24, 2026
- 81°F
- 48°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 6mphSSE 150°
- Humidity: 50%
- UV index: 4
- Sunrise: 7:21 am CDT
- Sunset: 6:12 pm CDT
- details ▼
- Sunday
- Oct 25, 2026
- 81°F
- 52°F
Partly Cloudy
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 6mphSW 215°
- Humidity: 54%
- UV index: 4
- Sunrise: 7:22 am CDT
- Sunset: 6:11 pm CDT
- details ▼
- Monday
- Oct 26, 2026
- 79°F
- 52°F
Partly Cloudy
- Precip. probability: 20%
- Precipitation: 0"
- Wind: 5mphWSW 254°
- Humidity: 58%
- UV index: 4
- Sunrise: 7:23 am CDT
- Sunset: 6:09 pm CDT
- details ▼
For the next ten days, a combination of cloudy and dry and sunny weather is anticipated.
Rain is not expected in O'Fallon in the upcoming days.
There will be a considerable variation in temperature in the upcoming days. Highs will range from 60.8°F to 80.6°F, while the lowest night temperatures will vary also significantly, as the minimum temperature is expected to range between 37.4°F and 51.8°F.
Friday through next Sunday, with the highest temperature of 80.6°F, will be the warmest days in O'Fallon; today is the coldest day, with a maximum temperature of 60.8°F.
Rain is not expected in O'Fallon in the upcoming days.
There will be a considerable variation in temperature in the upcoming days. Highs will range from 60.8°F to 80.6°F, while the lowest night temperatures will vary also significantly, as the minimum temperature is expected to range between 37.4°F and 51.8°F.
Friday through next Sunday, with the highest temperature of 80.6°F, will be the warmest days in O'Fallon; today is the coldest day, with a maximum temperature of 60.8°F.
Updated: Oct 17, 2026 @ 15:42:28 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 Saturday, in O'Fallon, the weather remains calm, bright, and sunny.
Today, the maximum temperature will be 60.8°F, while the minimum temperature will be 37.4°F.
The maximum temperature today will be a few degrees lower than the average highest temperature in October. The lowest temperature will be notably lower than the average low of 48.7°F.
The maximum temperature today will be a few degrees lower than the average highest temperature in October. The lowest temperature will be notably lower than the average low of 48.7°F.
On Saturday, in O'Fallon, sunrise was at 7:14 am and sunset will be at 6:21 pm (CDT).
In O'Fallon, today, there will be 11h and 7min of daylight.
On Sunday, skies are expected to be clear and full of sunshine.
Tomorrow, the highest temperature will be 66.2°F, while the lowest temperature will be 37.4°F.
The highest temperature tomorrow will be in line with the average maximum temperature in October. The lowest temperature will be significantly lower than the average low of 48.7°F.
The highest temperature tomorrow will be in line with the average maximum temperature in October. The lowest temperature will be significantly lower than the average low of 48.7°F.
On Sunday, in O'Fallon, sunrise will be at 7:15 am and sunset at 6:20 pm (CDT).
In O'Fallon, tomorrow, there will be 11h and 5min of daylight.





