Keystone, SD Weather Forecast
Local 7-day forecast
Sunny then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Keystone, SD in one place.
A slight chance of rain showers between noon and 3pm, then a slight chance of showers and thunderstorms. Sunny. High near 71, with temperatures falling to around 69 in the afternoon. West wind 6 to 10 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Keystone, SD is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jun 8, 2026 10:38 PM MDT.
The active forecast window currently covers Jun 10 to Jun 15, 2026 for Keystone, SD.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 10 to Jun 15, 2026
- Latest sync
- Jun 8, 2026 10:38 PM MDT
- Forecast office
- UNR
- Source
- NOAA / NWS
Daily Outlook
This Week in Keystone
Friday looks like the warmest upcoming period in Keystone at 76 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 46 degrees F.
The strongest winds are forecast for Thursday at about 9 to 14 mph NW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 8, 2026 10:38 PM MDT
- Coverage
- 6 days
- Time zone
- America/Denver
- Forecast office
- UNR
- Radar station
- KUDX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of rain showers after midnight. Partly cloudy, with a low around 46. Northwest wind around 8 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.
Mostly sunny, with a high near 66. Northwest wind 9 to 14 mph, with gusts as high as 37 mph.
Mostly clear, with a low around 48.
Sunny, with a high near 76.
Mostly clear, with a low around 51.
Mostly sunny, with a high near 68.
A chance of showers and thunderstorms. Partly cloudy, with a low around 47.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 61.
A slight chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 46.
A slight chance of rain showers before noon, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 64.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jun 10
|
Sunny then Slight Chance Showers And Thunderstorms
|
71°F |
6 to 10 mph
W
|
|
Wednesday Night
Jun 10
|
Partly Cloudy then Slight Chance Rain Showers
|
46°F |
8 mph
NW
|
|
Thursday
Jun 11
|
Mostly Sunny
|
66°F |
9 to 14 mph
NW
|
|
Thursday Night
Jun 11
|
Mostly Clear
|
48°F |
3 to 10 mph
W
|
|
Friday
Jun 12
|
Sunny
|
76°F |
7 mph
W
|
|
Friday Night
Jun 12
|
Mostly Clear
|
51°F |
6 mph
N
|
|
Saturday
Jun 13
|
Mostly Sunny
|
68°F |
5 to 9 mph
N
|
|
Saturday Night
Jun 13
|
Chance Showers And Thunderstorms
|
47°F |
5 to 9 mph
N
|
|
Sunday
Jun 14
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
61°F |
5 to 8 mph
N
|
|
Sunday Night
Jun 14
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
46°F |
7 mph
NW
|
|
Monday
Jun 15
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
64°F |
5 to 8 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Keystone.
