Weather forecast for 10 daysCastlewood, SD
Weather forecast for the weekend
Sunday Oct 18, 2026
- 66°F
- 41°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 13mphSSW 202°
- Humidity: 50%
- UV index: 3
- Sunrise: 7:47 am CDT
- Sunset: 6:38 pm CDT
- details ▼
Today, on Sunday, October 18, expect bright skies and plenty of sunshine.
Temperatures will oscillate between a breezy 66.2°F at their highest and an icy 41°F at their lowest.
Temperatures are trending warmer, with a peak resembling September's average maximum rather than October's seasonal high.
Sunrise was at 7:47 am and sunset will be at 6:38 pm; the daylight will last for 10h and 51min.
Temperatures will oscillate between a breezy 66.2°F at their highest and an icy 41°F at their lowest.
Temperatures are trending warmer, with a peak resembling September's average maximum rather than October's seasonal high.
Sunrise was at 7:47 am and sunset will be at 6:38 pm; the daylight will last for 10h and 51min.
10-day overview
Daily temperatures
Warmest day: Thursday 75°C.
Coldest period: Sunday - Monday 57°C.
Coldest period: Sunday - Monday 57°C.
Chance of precipitation
Highest chance: 24%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 66°F
- 41°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 13mphSSW 202°
- Humidity: 50%
- UV index: 3
- Sunrise: 7:47 am CDT
- Sunset: 6:38 pm CDT
- details ▼
- Monday
- Oct 19, 2026
- 64°F
- 43°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 11mphE 84°
- Humidity: 55%
- UV index: 3
- Sunrise: 7:49 am CDT
- Sunset: 6:36 pm CDT
- details ▼
- Tuesday
- Oct 20, 2026
- 70°F
- 46°F
Sunny
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 17mphSSE 167°
- Humidity: 61%
- UV index: 3
- Sunrise: 7:50 am CDT
- Sunset: 6:35 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 70°F
- 46°F
Mostly Sunny
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 7mphESE 123°
- Humidity: 67%
- UV index: 3
- Sunrise: 7:51 am CDT
- Sunset: 6:33 pm CDT
- details ▼
- Thursday
- Oct 22, 2026
- 75°F
- 57°F
Mostly Sunny
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 11mphSE 142°
- Humidity: 67%
- UV index: 3
- Sunrise: 7:53 am CDT
- Sunset: 6:32 pm CDT
- details ▼
- Friday
- Oct 23, 2026
- 73°F
- 57°F
Mostly Cloudy / Wind
- Precip. probability: 17%
- Precipitation: 0.04"
- Wind: 23mphSSE 162°
- Humidity: 55%
- UV index: 2
- Sunrise: 7:54 am CDT
- Sunset: 6:30 pm CDT
- details ▼
- Saturday
- Oct 24, 2026
- 61°F
- 41°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 14mphWSW 251°
- Humidity: 66%
- UV index: 2
- Sunrise: 7:55 am CDT
- Sunset: 6:28 pm CDT
- details ▼
- Sunday
- Oct 25, 2026
- 57°F
- 43°F
Mostly Sunny
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 9mphE 83°
- Humidity: 62%
- UV index: 3
- Sunrise: 7:56 am CDT
- Sunset: 6:27 pm CDT
- details ▼
- Monday
- Oct 26, 2026
- 57°F
- 48°F
Partly Cloudy
- Precip. probability: 23%
- Precipitation: 0"
- Wind: 12mphSE 135°
- Humidity: 75%
- UV index: 2
- Sunrise: 7:58 am CDT
- Sunset: 6:25 pm CDT
- details ▼
- Tuesday
- Oct 27, 2026
- 61°F
- 46°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 15mphSSE 153°
- Humidity: 71%
- UV index: 2
- Sunrise: 7:59 am CDT
- Sunset: 6:24 pm CDT
- details ▼
A combination of bright and cloud-filled weather is expected.
With a 17% probability, rainfall is expected only on Friday. Forecasted precipitation will be minimal at 0.04".
Temperature differences will be noticeable in the next ten days. Highs will range from 57.2°F to 75.2°F, while there will be also a marked difference in overnight low temperatures, as temperatures overnight will fluctuate from 41°F up to 57.2°F.
The warmest day will be Thursday, with a maximum of 75.2°F; with a maximum temperature of 57.2°F, next Sunday and Monday will be the coldest days.
With a 17% probability, rainfall is expected only on Friday. Forecasted precipitation will be minimal at 0.04".
Temperature differences will be noticeable in the next ten days. Highs will range from 57.2°F to 75.2°F, while there will be also a marked difference in overnight low temperatures, as temperatures overnight will fluctuate from 41°F up to 57.2°F.
The warmest day will be Thursday, with a maximum of 75.2°F; with a maximum temperature of 57.2°F, next Sunday and Monday will be the coldest days.
Updated: Oct 18, 2026 @ 14:07:58 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, sunny skies and pleasant visibility are expected.
Today, the highest temperature will be 66.2°F, while the lowest temperature will be 41°F.
Today, the maximum temperature will be noticeably higher than the average highest temperature of 54.3°F in October. Today, the lowest temperature will be in line with the average low temperature.
Today, the maximum temperature will be noticeably higher than the average highest temperature of 54.3°F in October. Today, the lowest temperature will be in line with the average low temperature.
On Sunday, in Castlewood, sunrise was at 7:47 am and sunset will be at 6:38 pm (CDT).
In Castlewood, the length of the day today will be 10h and 51min.
