Weather forecast for 10 daysSpearfish, SD
Weather forecast for the weekend
Sunday Oct 18, 2026
- 66°F
- 41°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 11mphNNE 22°
- Humidity: 36%
- UV index: 3
- Sunrise: 7:14 am MDT
- Sunset: 6:06 pm MDT
- details ▼
Today, expect consistent sunshine and open skies.
Temperature fluctuations between an enjoyable 66.2°F and a cold 41°F are predicted.
A high of 66.2°F is expected, which resembles September's climate average of 72.5°F more than October's 54.5°F.
Sunrise will be at 7:14 am and sunset at 6:06 pm; the daylight will last for 10h and 52min.
Temperature fluctuations between an enjoyable 66.2°F and a cold 41°F are predicted.
A high of 66.2°F is expected, which resembles September's climate average of 72.5°F more than October's 54.5°F.
Sunrise will be at 7:14 am and sunset at 6:06 pm; the daylight will last for 10h and 52min.
10-day overview
Daily temperatures
Warmest day: Thursday 79°C.
Coldest day: Saturday 54°C.
Coldest day: Saturday 54°C.
Chance of precipitation
Highest chance: Saturday 33%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 66°F
- 41°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 11mphNNE 22°
- Humidity: 36%
- UV index: 3
- Sunrise: 7:14 am MDT
- Sunset: 6:06 pm MDT
- details ▼
- Monday
- Oct 19, 2026
- 68°F
- 46°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 12mphESE 115°
- Humidity: 38%
- UV index: 3
- Sunrise: 7:16 am MDT
- Sunset: 6:04 pm MDT
- details ▼
- Tuesday
- Oct 20, 2026
- 75°F
- 45°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 6mphN 357°
- Humidity: 38%
- UV index: 3
- Sunrise: 7:17 am MDT
- Sunset: 6:02 pm MDT
- details ▼
- Wednesday
- Oct 21, 2026
- 70°F
- 54°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 9mphNE 53°
- Humidity: 46%
- UV index: 3
- Sunrise: 7:18 am MDT
- Sunset: 6:01 pm MDT
- details ▼
- Thursday
- Oct 22, 2026
- 79°F
- 59°F
Partly Cloudy
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 10mphSSW 199°
- Humidity: 41%
- UV index: 3
- Sunrise: 7:20 am MDT
- Sunset: 5:59 pm MDT
- details ▼
- Friday
- Oct 23, 2026
- 72°F
- 43°F
Partly Cloudy
- Precip. probability: 21%
- Precipitation: 0"
- Wind: 14mphSW 236°
- Humidity: 42%
- UV index: 3
- Sunrise: 7:21 am MDT
- Sunset: 5:58 pm MDT
- details ▼
- Saturday
- Oct 24, 2026
- 54°F
- 39°F
AM Showers
- Precip. probability: 33%
- Precipitation: 0.08"
- Wind: 14mphNW 304°
- Humidity: 55%
- UV index: 3
- Sunrise: 7:22 am MDT
- Sunset: 5:56 pm MDT
- details ▼
- Sunday
- Oct 25, 2026
- 61°F
- 41°F
Partly Cloudy
- Precip. probability: 9%
- Precipitation: 0.04"
- Wind: 9mphESE 114°
- Humidity: 52%
- UV index: 3
- Sunrise: 7:23 am MDT
- Sunset: 5:55 pm MDT
- details ▼
- Monday
- Oct 26, 2026
- 59°F
- 41°F
Mostly Sunny
- Precip. probability: 6%
- Precipitation: 0"
- Wind: 8mphENE 70°
- Humidity: 52%
- UV index: 3
- Sunrise: 7:25 am MDT
- Sunset: 5:53 pm MDT
- details ▼
- Tuesday
- Oct 27, 2026
- 55°F
- 39°F
Partly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 11mphNW 318°
- Humidity: 56%
- UV index: 3
- Sunrise: 7:26 am MDT
- Sunset: 5:51 pm MDT
- details ▼
Over the next ten days, a mix of sun-filled, cloud-filled and wet weather is forecasted.
With a 33% probability, rainfall is forecasted only for Saturday. Predicted precipitation will be minimal at 0.08".
The temperature will vary considerably in the upcoming days. Maximum temperatures are forecasted between 53.6°F and 78.8°F, while the fluctuation in night temperatures will be also significant, as the lowest temperatures will be recorded between 39.2°F and 59°F.
With the highest temperature of 78.8°F, Thursday will be the warmest day; the coldest day will be Saturday, with a maximum of 53.6°F.
With a 33% probability, rainfall is forecasted only for Saturday. Predicted precipitation will be minimal at 0.08".
The temperature will vary considerably in the upcoming days. Maximum temperatures are forecasted between 53.6°F and 78.8°F, while the fluctuation in night temperatures will be also significant, as the lowest temperatures will be recorded between 39.2°F and 59°F.
With the highest temperature of 78.8°F, Thursday will be the warmest day; the coldest day will be Saturday, with a maximum of 53.6°F.
Updated: Oct 18, 2026 @ 07:12:16 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, sunshine is expected with little to no cloud cover.
Today, the highest temperature in Spearfish will be 66.2°F, while the lowest temperature will be 41°F.
Today, the maximum temperature will be uncommonly higher than the average highest temperature of 54.5°F in October. Today, the lowest temperature will be in line with the average low temperature.
Today, the maximum temperature will be uncommonly higher than the average highest temperature of 54.5°F in October. Today, the lowest temperature will be in line with the average low temperature.
On Sunday, in Spearfish, sunrise will be at 7:14 am and sunset at 6:06 pm (MDT).
In Spearfish, the length of the day today will be 10h and 52min.
