Weather forecast for 10 daysMount Vernon, SD
Weather forecast for the weekend
Sunday Oct 18, 2026
- 70°F
- 39°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 11mphS 169°
- Humidity: 46%
- UV index: 3
- Sunrise: 7:51 am CDT
- Sunset: 6:44 pm CDT
- details ▼
On Sunday, October 18, sunshine and minimal clouds are in the outlook.
A substantial temperature fluctuation from an agreeable 69.8°F at its peak to a wintry 39.2°F at its lowest point is predicted.
Today, expect conditions that are warmer than normal, with a temperature that reflects September's typical maximum of 76.1°F.
Sunrise will be at 7:51 am and sunset at 6:44 pm; the daylight will last for 10h and 53min.
A substantial temperature fluctuation from an agreeable 69.8°F at its peak to a wintry 39.2°F at its lowest point is predicted.
Today, expect conditions that are warmer than normal, with a temperature that reflects September's typical maximum of 76.1°F.
Sunrise will be at 7:51 am and sunset at 6:44 pm; the daylight will last for 10h and 53min.
10-day overview
Daily temperatures
Warmest day: Friday 79°C.
Coldest day: Sunday 25.10. 61°C.
Coldest day: Sunday 25.10. 61°C.
Chance of precipitation
Highest chance: Monday - Tuesday 24%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 70°F
- 39°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 11mphS 169°
- Humidity: 46%
- UV index: 3
- Sunrise: 7:51 am CDT
- Sunset: 6:44 pm CDT
- details ▼
- Monday
- Oct 19, 2026
- 68°F
- 43°F
Mostly Sunny
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 10mphE 95°
- Humidity: 61%
- UV index: 3
- Sunrise: 7:52 am CDT
- Sunset: 6:43 pm CDT
- details ▼
- Tuesday
- Oct 20, 2026
- 72°F
- 46°F
Sunny
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 15mphSSE 162°
- Humidity: 62%
- UV index: 3
- Sunrise: 7:53 am CDT
- Sunset: 6:41 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 73°F
- 45°F
Mostly Sunny
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 6mphESE 119°
- Humidity: 68%
- UV index: 3
- Sunrise: 7:55 am CDT
- Sunset: 6:40 pm CDT
- details ▼
- Thursday
- Oct 22, 2026
- 77°F
- 59°F
Partly Cloudy
- Precip. probability: 9%
- Precipitation: 0"
- Wind: 12mphSSE 149°
- Humidity: 69%
- UV index: 3
- Sunrise: 7:56 am CDT
- Sunset: 6:38 pm CDT
- details ▼
- Friday
- Oct 23, 2026
- 79°F
- 59°F
Partly Cloudy / Wind
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 22mphSSE 160°
- Humidity: 56%
- UV index: 3
- Sunrise: 7:57 am CDT
- Sunset: 6:36 pm CDT
- details ▼
- Saturday
- Oct 24, 2026
- 66°F
- 43°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 15mphW 261°
- Humidity: 58%
- UV index: 3
- Sunrise: 7:58 am CDT
- Sunset: 6:35 pm CDT
- details ▼
- Sunday
- Oct 25, 2026
- 61°F
- 45°F
Mostly Sunny
- Precip. probability: 11%
- Precipitation: 0.04"
- Wind: 9mphENE 60°
- Humidity: 63%
- UV index: 3
- Sunrise: 8:00 am CDT
- Sunset: 6:33 pm CDT
- details ▼
- Monday
- Oct 26, 2026
- 66°F
- 50°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 13mphSE 145°
- Humidity: 69%
- UV index: 3
- Sunrise: 8:01 am CDT
- Sunset: 6:32 pm CDT
- details ▼
- Tuesday
- Oct 27, 2026
- 64°F
- 46°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 15mphSSE 154°
- Humidity: 64%
- UV index: 3
- Sunrise: 8:02 am CDT
- Sunset: 6:30 pm CDT
- details ▼
A combination of clear and dull weather is anticipated.
With a 11% probability, rainfall is predicted only for next Sunday. Predicted precipitation will be minimal at 0.04".
Temperature variation will be noticeable throughout the forecast window. Forecast highs will fluctuate between 60.8°F and 78.8°F, while the fluctuation in night temperatures will be also significant, as the overnight lows will vary from 39.2°F to 59°F.
The warmest day will be Friday, with a maximum of 78.8°F; the coldest day will be next Sunday, with a maximum of 60.8°F.
With a 11% probability, rainfall is predicted only for next Sunday. Predicted precipitation will be minimal at 0.04".
Temperature variation will be noticeable throughout the forecast window. Forecast highs will fluctuate between 60.8°F and 78.8°F, while the fluctuation in night temperatures will be also significant, as the overnight lows will vary from 39.2°F to 59°F.
The warmest day will be Friday, with a maximum of 78.8°F; the coldest day will be next Sunday, with a maximum of 60.8°F.
Updated: Oct 18, 2026 @ 10:55:42 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 Mount Vernon, sun-filled conditions are expected to persist.
Today, the maximum temperature in Mount Vernon, South Dakota, will be 69.8°F, while the minimum temperature will be 39.2°F.
The maximum temperature will be notably higher than the average highest temperature of 58.5°F in October. The lowest temperature today will be in line with the average low temperature.
The maximum temperature will be notably higher than the average highest temperature of 58.5°F in October. The lowest temperature today will be in line with the average low temperature.
On Sunday, in Mount Vernon, sunrise will be at 7:51 am and sunset at 6:44 pm (CDT).
Today, the daylight will last for 10h and 53min.
