Weather forecast for 10 daysIona, SD
Weather forecast for the weekend
Sunday Oct 18, 2026
- 70°F
- 37°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphNW 317°
- Humidity: 42%
- UV index: 3
- Sunrise: 7:55 am CDT
- Sunset: 6:49 pm CDT
- details ▼
Today, in Iona, the forecast calls for abundant sunshine.
Temperature changes will be considerable, from a high of an agreeable 69.8°F to a low of an icy 37.4°F.
Expect temperatures to match September's average maximum of 76.3°F rather than October's 58.6°F.
Sunrise will be at 7:55 am and sunset at 6:49 pm; the daylight will last for 10h and 54min.
Temperature changes will be considerable, from a high of an agreeable 69.8°F to a low of an icy 37.4°F.
Expect temperatures to match September's average maximum of 76.3°F rather than October's 58.6°F.
Sunrise will be at 7:55 am and sunset at 6:49 pm; the daylight will last for 10h and 54min.
10-day overview
Daily temperatures
Warmest day: Friday 79°C.
Coldest day: Sunday 25.10. 59°C.
Coldest day: Sunday 25.10. 59°C.
Chance of precipitation
Highest chance: Saturday 22%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 70°F
- 37°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphNW 317°
- Humidity: 42%
- UV index: 3
- Sunrise: 7:55 am CDT
- Sunset: 6:49 pm CDT
- details ▼
- Monday
- Oct 19, 2026
- 66°F
- 41°F
Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 10mphE 84°
- Humidity: 62%
- UV index: 3
- Sunrise: 7:57 am CDT
- Sunset: 6:48 pm CDT
- details ▼
- Tuesday
- Oct 20, 2026
- 72°F
- 46°F
Sunny
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 15mphSSE 165°
- Humidity: 64%
- UV index: 3
- Sunrise: 7:58 am CDT
- Sunset: 6:46 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 72°F
- 45°F
Sunny
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 7mphNW 315°
- Humidity: 69%
- UV index: 3
- Sunrise: 7:59 am CDT
- Sunset: 6:44 pm CDT
- details ▼
- Thursday
- Oct 22, 2026
- 77°F
- 59°F
Partly Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 13mphSSE 152°
- Humidity: 69%
- UV index: 3
- Sunrise: 8:00 am CDT
- Sunset: 6:43 pm CDT
- details ▼
- Friday
- Oct 23, 2026
- 79°F
- 55°F
Partly Cloudy / Wind
- Precip. probability: 16%
- Precipitation: 0"
- Wind: 21mphSSE 164°
- Humidity: 58%
- UV index: 3
- Sunrise: 8:02 am CDT
- Sunset: 6:41 pm CDT
- details ▼
- Saturday
- Oct 24, 2026
- 63°F
- 43°F
Partly Cloudy
- Precip. probability: 22%
- Precipitation: 0"
- Wind: 14mphWNW 292°
- Humidity: 59%
- UV index: 3
- Sunrise: 8:03 am CDT
- Sunset: 6:40 pm CDT
- details ▼
- Sunday
- Oct 25, 2026
- 59°F
- 45°F
Partly Cloudy
- Precip. probability: 21%
- Precipitation: 0"
- Wind: 11mphENE 72°
- Humidity: 66%
- UV index: 3
- Sunrise: 8:04 am CDT
- Sunset: 6:38 pm CDT
- details ▼
- Monday
- Oct 26, 2026
- 64°F
- 48°F
Partly Cloudy
- Precip. probability: 16%
- Precipitation: 0"
- Wind: 13mphSSE 151°
- Humidity: 72%
- UV index: 3
- Sunrise: 8:05 am CDT
- Sunset: 6:37 pm CDT
- details ▼
- Tuesday
- Oct 27, 2026
- 63°F
- 45°F
Partly Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 13mphSSE 154°
- Humidity: 65%
- UV index: 3
- Sunrise: 8:07 am CDT
- Sunset: 6:35 pm CDT
- details ▼
Across the following ten days, a combination of cloud-filled and sun-filled weather is predicted.
Rainfall is not expected in Iona in the upcoming days.
Expect a substantial fluctuation in daytime highs across the forecast period. Forecast highs will fluctuate between 59°F and 78.8°F, while there will be also a marked difference in overnight low temperatures, as the lowest temperatures will be recorded between 37.4°F and 59°F.
Expect the warmest day on Friday, with temperatures peaking at 78.8°F; the lowest daytime temperature of the period will be reached on next Sunday, peaking at 59°F.
Rainfall is not expected in Iona in the upcoming days.
Expect a substantial fluctuation in daytime highs across the forecast period. Forecast highs will fluctuate between 59°F and 78.8°F, while there will be also a marked difference in overnight low temperatures, as the lowest temperatures will be recorded between 37.4°F and 59°F.
Expect the warmest day on Friday, with temperatures peaking at 78.8°F; the lowest daytime temperature of the period will be reached on next Sunday, peaking at 59°F.
Updated: Oct 18, 2026 @ 07:46:12 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
Today, in Iona, sunshine and minimal clouds are in the outlook.
Today, the highest temperature will be 69.8°F, while the lowest temperature will be 37.4°F.
The maximum temperature will be significantly higher than the average highest temperature of 58.6°F in October. The lowest temperature today will be slightly cooler than the average low temperature.
The maximum temperature will be significantly higher than the average highest temperature of 58.6°F in October. The lowest temperature today will be slightly cooler than the average low temperature.
On Sunday, in Iona, sunrise will be at 7:55 am and sunset at 6:49 pm (CDT).
In Iona, today, there will be 10h and 54min of daylight.
