Keystone in numbers
- Coordinates
- 43.8955, -103.4180
- Elevation
- 1320 m above sea level
- Population
- 343
- Region
- South Dakota
- Country
- United States, North America
- Capital
- Washington, D.C. — 2259 km away
- Same name
- 31 more places in the world share this name
What time is it in Keystone, South Dakota, United States
Use this page to see what time it is in Keystone, South Dakota, United States — the America/Denver zone applies there (−6).
Keystone, United States
Thursday, 29 October 2026
UTC−6 · America/Denver
Local time in Keystone
UTC−6 · daylight saving time is active
What the clock shows right now in Keystone.
The sun today
Sunrise 7:27 AM Solar noon 12:38 PM Sunset 5:50 PM Daylight 10 h 23 min Night 13 h 37 min Civil twilight 6:57 AM – 6:20 PM
Weather in Keystone right now
Loading the current weather…
Weather data by Open-Meteo, updated every 30 minutes.
Keystone and its neighbours
Postal codes
- 46759
- 52249
- 57751
- 69144
Postal codes come from the free GeoNames dataset. Where a code is listed with a distance, it belongs to a nearby settlement — GeoNames spells that name differently from ours.
Largest cities in South Dakota
- Sioux Falls 171 544
- Rapid City 73 569
- Aberdeen 28 102
- Brookings 23 657
- Watertown 22 073
- Mitchell 15 669
Other places named Keystone
- Keystone Florida, United States
- Keystone Colorado, United States
- Keystone Iowa, United States
- Keystone West Virginia, United States
- Keystone West Virginia, United States
Same time zone — America/Denver
Nearby places
- Harney — 2.4 km
- Frenchtown (historical) — 3.0 km
- Spokane — 6.7 km
- Hayward (historical) — 7.2 km
- Rockerville — 8.4 km
- Kennedyville — 9.0 km
Keystone: clock, sun and surroundings
Postal numbering in Keystone covers 4 codes.
Keystone runs on America/Denver, which sits UTC−6 relative to Coordinated Universal Time. Daylight saving in effect: Yes.
Daylight arrives in Keystone at 7:27 AM and departs at 5:50 PM. It lasts 10 h 23 min today.
For Harney and Frenchtown (historical) near Keystone, the clock reads the same.
Questions and answers
- How should the time zone of Keystone be stated?
- It should be stated as America/Denver, with an offset of −6.
- Does Keystone adjust its clocks for part of the year?
- Yes.
- What hour brings sunrise in Keystone?
- The hour is 7:27 AM.