Weather forecast for 10 daysCastlewood, SD
Weather forecast for the weekend
Sunday Oct 18, 2026
- 64°F
- 41°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 9mphWSW 243°
- Humidity: 41%
- UV index: 3
- Sunrise: 7:47 am CDT
- Sunset: 6:38 pm CDT
- details ▼
Today, sunny and dry conditions are anticipated.
Temperatures are predicted to peak at a breezy 64.4°F and drop to a minimum of a wintry 41°F.
Today, the temperature will be higher and more consistent with September's typical high of 71.6°F than with October's 54.3°F.
Sunrise was at 7:47 am and sunset will be at 6:38 pm; the daylight will last for 10h and 51min.
Temperatures are predicted to peak at a breezy 64.4°F and drop to a minimum of a wintry 41°F.
Today, the temperature will be higher and more consistent with September's typical high of 71.6°F than with October's 54.3°F.
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
- 64°F
- 41°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 9mphWSW 243°
- Humidity: 41%
- UV index: 3
- Sunrise: 7:47 am CDT
- Sunset: 6:38 pm CDT
- details ▼
- Monday
- Oct 19, 2026
- 64°F
- 41°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 11mphE 83°
- Humidity: 56%
- UV index: 3
- Sunrise: 7:49 am CDT
- Sunset: 6:36 pm CDT
- details ▼
- Tuesday
- Oct 20, 2026
- 68°F
- 46°F
Sunny
- Precip. probability: 8%
- Precipitation: 0"
- Wind: 17mphSSE 167°
- Humidity: 62%
- UV index: 3
- Sunrise: 7:50 am CDT
- Sunset: 6:35 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 70°F
- 45°F
Mostly Sunny
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 7mphESE 108°
- 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: 66%
- 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 161°
- Humidity: 56%
- 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 250°
- 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: 9mphENE 75°
- 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: 24%
- Precipitation: 0"
- Wind: 12mphSE 133°
- Humidity: 75%
- UV index: 2
- Sunrise: 7:58 am CDT
- Sunset: 6:25 pm CDT
- details ▼
- Tuesday
- Oct 27, 2026
- 59°F
- 45°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 15mphSSE 150°
- Humidity: 71%
- UV index: 2
- Sunrise: 7:59 am CDT
- Sunset: 6:24 pm CDT
- details ▼
Ten-day trends indicate that a combination of sun-filled and cloud-filled weather is anticipated.
With a 17% probability, rainfall is anticipated only on Friday. The precipitation will be minimal at 0.04".
Significant changes in temperature are expected over the next several days. The temperature is expected to swing from 57.2°F up to 75.2°F, while the variation in nighttime lows will be also notably wide, as nighttime lows are forecast to fall between 41°F and 57.2°F.
With the highest temperature of 75.2°F, Thursday will be the warmest day; next Sunday and Monday, with the highest temperature of 57.2°F, will be the coldest days.
With a 17% probability, rainfall is anticipated only on Friday. The precipitation will be minimal at 0.04".
Significant changes in temperature are expected over the next several days. The temperature is expected to swing from 57.2°F up to 75.2°F, while the variation in nighttime lows will be also notably wide, as nighttime lows are forecast to fall between 41°F and 57.2°F.
With the highest temperature of 75.2°F, Thursday will be the warmest day; next Sunday and Monday, with the highest temperature of 57.2°F, will be the coldest days.
Updated: Oct 18, 2026 @ 17:08:52 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 Castlewood, conditions will remain bright with clear skies.
Today, the maximum temperature will be 64.4°F, while the minimum temperature will be 41°F.
The highest temperature today will be significantly higher than the average maximum of 54.3°F in October. The lowest temperature today will be in line with the average low temperature.
The highest temperature today will be significantly higher than the average maximum of 54.3°F in October. The lowest temperature today 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, today, there will be 10h and 51min of daylight.
