Weather forecast for tomorrowKeystone, SD
Weather forecast for tomorrow
Monday Oct 19, 2026
- 61°F
- 45°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 9mphSSE 160°
- Humidity: 47%
- UV index: 3
- Sunrise: 7:13 am MDT
- Sunset: 6:03 pm MDT
- details ▼
On Monday, in Keystone, skies are expected to be clear and full of sunshine.
The temperature is forecasted to vary between a maximum of an enjoyable 60.8°F and a minimum of a chilly 44.6°F.
The daily maximum temperature is forecasted to be a couple of degrees higher than October's climate average of 54°F.
Sunrise will be at 7:13 am and sunset at 6:03 pm; tomorrow's daylight will last for 10h and 50min.
The temperature is forecasted to vary between a maximum of an enjoyable 60.8°F and a minimum of a chilly 44.6°F.
The daily maximum temperature is forecasted to be a couple of degrees higher than October's climate average of 54°F.
Sunrise will be at 7:13 am and sunset at 6:03 pm; tomorrow's daylight will last for 10h and 50min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 59°C.
Coldest hour: 6 am 37°C.
Coldest hour: 6 am 37°C.
Chance of precipitation
Highest chance: 9 pm 3%.
Hourly weather forecast
- 12 am
- 43°F
- Feels like:43°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 2mphNNW 332°
- Humidity: 57%
- Pressure: 30.21"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 39°F
- Feels like:39°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 2mphNW 318°
- Humidity: 62%
- Pressure: 30.21"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 37°F
- Feels like:37°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 2mphWNW 286°
- Humidity: 66%
- Pressure: 30.21"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 37°F
- Feels like:37°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 3mphWSW 258°
- Humidity: 68%
- Pressure: 30.21"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 7:13 am
- 8 am
- 39°F
- Feels like:39°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 2mphSW 226°
- Humidity: 67%
- Pressure: 30.21"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 50°F
- Feels like:48°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 4mphSSE 152°
- Humidity: 48%
- Pressure: 30.18"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 12 pm
- 57°F
- Feels like:55°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 7mphSE 146°
- Humidity: 40%
- Pressure: 30.12"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 2 pm
- 59°F
- Feels like:57°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 8mphSE 146°
- Humidity: 38%
- Pressure: 30.06"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 4 pm
- 59°F
- Feels like:57°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 9mphSE 140°
- Humidity: 40%
- Pressure: 30.03"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 54°F
- Feels like:52°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 7mphSSE 152°
- Humidity: 49%
- Pressure: 30.06"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:03 pm
- 8 pm
- 48°F
- Feels like:45°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 5mphS 188°
- Humidity: 61%
- Pressure: 30.09"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 46°F
- Feels like:43°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 7mphSW 226°
- Humidity: 65%
- Pressure: 30.09"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, on Monday, sunshine is expected.
The temperature will vary between the lowest temperature of 37.4°F and the highest temperature of 59°F. The warmest part of the day will be from 1 pm to 4 pm.
The maximum temperature will be moderately higher than October's average high of 54°F. The lowest temperature is expected to be more close to September's minimum average of 51.1°F than October's 36.7°F.
The temperature will vary between the lowest temperature of 37.4°F and the highest temperature of 59°F. The warmest part of the day will be from 1 pm to 4 pm.
The maximum temperature will be moderately higher than October's average high of 54°F. The lowest temperature is expected to be more close to September's minimum average of 51.1°F than October's 36.7°F.
Updated: Oct 18, 2026 @ 06:52:17 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
On Monday, in Keystone, sunny skies are in store, with excellent visibility.
Tomorrow, the maximum temperature will be 60.8°F, while the minimum temperature will be 44.6°F.
The highest temperature will be a couple of degrees higher than the average maximum of 54°F in October. The lowest temperature will be also relatively higher than the average low of 36.7°F.
The highest temperature will be a couple of degrees higher than the average maximum of 54°F in October. The lowest temperature will be also relatively higher than the average low of 36.7°F.
On Monday, in Keystone, sunrise will be at 7:13 am and sunset at 6:03 pm (MDT).
Tomorrow, the daylight will last for 10h and 50min.
