Weather forecast for 10 daysAltamont, SD

Weather forecast for the weekend

Sunday Oct 18, 2026

  • 66°F
  • 39°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 18mphWSW 254°
  • Humidity: 49%
  • UV index: 3
  • Sunrise: 7:46 am CDT
  • Sunset: 6:37 pm CDT
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Today, on Sunday, October 18, skies will stay clear and sunny.
Temperature readings will span from a daytime high of a breezy 66.2°F to a night low of a wintry 39.2°F.
Forecasts show a high closer to September's climate pattern, around 72.5°F, rather than October's 56.3°F.
Sunrise will be at 7:46 am and sunset at 6:37 pm; the daylight will last for 10h and 50min.

10-day overview

Daily temperatures

Warmest day: Thursday 75°C.
Coldest day: Sunday 25.10. 59°C.

Chance of precipitation

Highest chance: Saturday 33%.

Long-term weather forecast

  • Sunday
  • Oct 18, 2026
  • 66°F
  • 39°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 18mphWSW 254°
  • Humidity: 49%
  • UV index: 3
  • Sunrise: 7:46 am CDT
  • Sunset: 6:37 pm CDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 64°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 9mphENE 74°
  • Humidity: 57%
  • UV index: 3
  • Sunrise: 7:47 am CDT
  • Sunset: 6:35 pm CDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 68°F
  • 46°F
Sunny
Sunny
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 15mphS 179°
  • Humidity: 59%
  • UV index: 3
  • Sunrise: 7:49 am CDT
  • Sunset: 6:33 pm CDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 70°F
  • 43°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 8mphNW 307°
  • Humidity: 64%
  • UV index: 3
  • Sunrise: 7:50 am CDT
  • Sunset: 6:32 pm CDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 75°F
  • 57°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 11mphSSE 148°
  • Humidity: 66%
  • UV index: 3
  • Sunrise: 7:51 am CDT
  • Sunset: 6:30 pm CDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 73°F
  • 59°F
Mostly Cloudy / Wind
Mostly Cloudy / Wind
  • Precip. probability: 17%
  • Precipitation: 0"
  • Wind: 21mphSSE 168°
  • Humidity: 52%
  • UV index: 2
  • Sunrise: 7:53 am CDT
  • Sunset: 6:28 pm CDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 66°F
  • 43°F
AM Showers
AM Showers
  • Precip. probability: 33%
  • Precipitation: 0.04"
  • Wind: 20mphSW 226°
  • Humidity: 59%
  • UV index: 2
  • Sunrise: 7:54 am CDT
  • Sunset: 6:27 pm CDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 59°F
  • 41°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 9mphN 5°
  • Humidity: 57%
  • UV index: 3
  • Sunrise: 7:55 am CDT
  • Sunset: 6:25 pm CDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 61°F
  • 48°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 12mphSE 129°
  • Humidity: 70%
  • UV index: 3
  • Sunrise: 7:57 am CDT
  • Sunset: 6:24 pm CDT
  • ▼
  • Tuesday
  • Oct 27, 2026
  • 61°F
  • 45°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 15mphSSE 158°
  • Humidity: 67%
  • UV index: 3
  • Sunrise: 7:58 am CDT
  • Sunset: 6:22 pm CDT
  • ▼
Over the next ten days, a mix of bright, overcast and showery weather is expected.
With a probability of 33%, rainfall is anticipated only on Saturday. Predicted precipitation will be minimal at 0.04".
Expect a substantial fluctuation in daytime highs over the next several days. Forecast highs will fluctuate between 59°F and 75.2°F, while the nightly low temperatures will show also a considerable swing, as temperatures overnight will fluctuate from 39.2°F up to 59°F.
Thursday is expected to be the warmest, reaching up to 75.2°F; the coldest day will be next Sunday, with a maximum of 59°F.
Updated: Oct 18, 2026 @ 11:10:02 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, expect bright skies and plenty of sunshine.

Today, the highest temperature will be 66.2°F, while the lowest temperature will be 39.2°F.
The highest temperature today will be noticeably higher than the average maximum of 56.3°F in October. The lowest temperature will be in line with the average low of 41°F.

On Sunday, in Altamont, sunrise will be at 7:46 am and sunset at 6:37 pm (CDT).

Today, the daylight will last for 10h and 50min.