Weather forecast for todayKeystone, SD

Weather forecast for today

Current condition 3:01 pm MDT

  • 75°F
  • Feels like:
    75°F
Sunny
Sunny
  • Precipitation: 0"
  • Wind: 9mphSW 220°
  • Humidity: 31%
  • Dewpoint: 43°F
  • Pressure: 29.82"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
At the moment, the horizon is crisp, and the weather remains sunny and inviting.
The temperature is a warm 75.2°F. The current temperature is almost at the maximum of today's anticipated 77°F.

Thursday Oct 22, 2026

  • 77°F
  • 57°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 9mphSW 222°
  • Humidity: 36%
  • UV index: 3
  • Sunrise: 7:17 am MDT
  • Sunset: 5:58 pm MDT
  • ▼
Today, in Keystone, changing cloud patterns will allow for periods of sunshine.
Expected temperatures will peak at a moderately hot 77°F and dip to a minimum of a refreshing 57.2°F.
Forecasts show a high closer to September's climate pattern, around 71.4°F, rather than October's 54°F.
Sunrise was at 7:17 am and sunset will be at 5:58 pm; the daylight will last for 10h and 41min.

Hourly overview

Hourly temperatures

Warmest hour: 4 pm 75°C.
Coldest period: 10 pm - 12 am 59°C.

Chance of precipitation

Highest chance: 6 pm - 8 pm 1%.

Hourly weather forecast

  • 4 pm
  • 75°F
  • Feels like:
    75°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 11mphSW 227°
  • Humidity: 33%
  • Pressure: 29.8"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 5 pm
  • 72°F
  • Feels like:
    72°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphSW 215°
  • Humidity: 37%
  • Pressure: 29.8"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 5:58 pm
  • 6 pm
  • 66°F
  • Feels like:
    66°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 7mphSSW 213°
  • Humidity: 45%
  • Pressure: 29.8"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 7 pm
  • 63°F
  • Feels like:
    63°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 4mphSW 221°
  • Humidity: 53%
  • Pressure: 29.83"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 pm
  • 61°F
  • Feels like:
    61°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 5mphSW 219°
  • Humidity: 56%
  • Pressure: 29.83"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 pm
  • 61°F
  • Feels like:
    59°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphSW 228°
  • Humidity: 56%
  • Pressure: 29.83"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 59°F
  • Feels like:
    59°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphSW 231°
  • Humidity: 57%
  • Pressure: 29.8"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 11 pm
  • 59°F
  • Feels like:
    59°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphSW 233°
  • Humidity: 59%
  • Pressure: 29.8"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 12 am
  • 59°F
  • Feels like:
    57°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 8mphSW 229°
  • Humidity: 60%
  • Pressure: 29.77"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 1 am
  • 59°F
  • Feels like:
    59°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 8mphSW 229°
  • Humidity: 59%
  • Pressure: 29.74"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
During the late afternoon and into the evening, primarily cloudy and occasionally clear weather is anticipated.
The temperature will vary between the highest temperature of 75.2°F and the lowest temperature of 59°F. The warmest part of the day is anticipated around 4 pm.
The day’s peak temperature will reflect September's norm of 71.4°F more than October's 54°F. Forecasts show a temperature also more consistent with September's average minimum of 51.1°F rather than the October average of 36.7°F.
Updated: Oct 22, 2026 @ 21:01:42 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Currently (3:01 pm MDT) it is 75.2°F in Keystone.

On Thursday, in Keystone, clouds and sunshine will create a dynamic sky throughout the day.

Today, the maximum temperature will be 77°F, while the minimum temperature will be 57.2°F.
The highest temperature will be noticeably higher than the average maximum of 54°F in October. The lowest temperature will be also significantly higher than the average low of 36.7°F.

On Thursday, in Keystone, sunrise was at 7:17 am and sunset will be at 5:58 pm (MDT).

In Keystone, today, there will be 10h and 41min of daylight.