Keystone, SD Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Keystone, SD in one place.
Sunny, with a high near 62. South wind 3 to 8 mph, with gusts as high as 23 mph.
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: Apr 16, 2026 11:59 AM MDT.
The active forecast window currently covers Apr 19 to Apr 22, 2026 for Keystone, SD.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 19 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 11:59 AM MDT
- Forecast office
- UNR
- Source
- NOAA / NWS
Daily Outlook
This Week in Keystone
Tuesday looks like the warmest upcoming period in Keystone at 75 degrees F.
Sunday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Wednesday at about 7 to 12 mph SW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 11:59 AM MDT
- Coverage
- 5 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
Mostly clear, with a low around 39. Northwest wind around 6 mph, with gusts as high as 18 mph.
Sunny, with a high near 74.
Partly cloudy, with a low around 46.
Sunny, with a high near 75.
A slight chance of rain showers. Partly cloudy, with a low around 49.
A chance of rain showers. Partly sunny, with a high near 70.
A chance of rain showers. Mostly cloudy, with a low around 45.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Apr 19
|
Sunny
|
62°F |
3 to 8 mph
S
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
39°F |
6 mph
NW
|
|
Monday
Apr 20
|
Sunny
|
74°F |
8 mph
W
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
46°F |
6 mph
W
|
|
Tuesday
Apr 21
|
Sunny
|
75°F |
5 to 8 mph
S
|
|
Tuesday Night
Apr 21
|
Slight Chance Rain Showers
|
49°F |
7 mph
N
|
|
Wednesday
Apr 22
|
Chance Rain Showers
|
70°F |
7 to 12 mph
SW
|
|
Wednesday Night
Apr 22
|
Chance Rain Showers
|
45°F |
10 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Keystone.
