Weather for 57751 — Keystone, SD
Conditions and forecast for the exact centre of ZIP code 57751 (43.885, -103.400), not a nearby airport.
29°
Clear sky
- Feels like:
- 21°
- Humidity:
- 67%
- Wind:
- 8 mph
- Dew point:
- 19°
Source updated: 11:43:38 AM · WeatherSignal checked: 11:43:38 AM
Next 12 hours in 57751
12 PM
29°
0%
1 PM
29°
0%
2 PM
32°
0%
3 PM
39°
0%
4 PM
42°
0%
5 PM
45°
0%
6 PM
48°
0%
7 PM
52°
0%
8 PM
55°
0%
9 PM
56°
0%
10 PM
57°
0%
11 PM
53°
0%
7 day forecast for 57751
Today
57° / 29°
0% rain · 11 mph wind
Saturday, Oct 17
76° / 43°
0% rain · 13 mph wind
Sunday, Oct 18
62° / 47°
0% rain · 14 mph wind
Monday, Oct 19
58° / 41°
0% rain · 7 mph wind
Tuesday, Oct 20
67° / 45°
0% rain · 9 mph wind
Wednesday, Oct 21
64° / 51°
0% rain · 9 mph wind
Thursday, Oct 22
63° / 46°
0% rain · 12 mph wind
About ZIP code 57751
57751 covers Keystone in South Dakota. Forecasts on this page are generated for the coordinates at the centre of the ZIP code, so small differences from a nearby city forecast are expected and usually correct.
Closest cities with full forecast pages: Fort Collins (243 mi), Billings (282 mi), Boulder (284 mi), Thornton (289 mi).
Nearby ZIP codes
Severe weather warnings are issued by the National Weather Service for counties and polygons that may not line up with ZIP code boundaries. Always follow official warnings for your exact address.
Planning your week in Keystone 57751, South Dakota
- The warmest afternoon ahead is tomorrow, reaching about 76°F.
- The coldest night ahead dips to about 29°F.
- This is a dry stretch — most days show rain chances under 20%, good for outdoor plans.
Common questions about Keystone 57751, South Dakota weather
- How accurate is the Keystone 57751, South Dakota forecast?
- The next 48 hours are usually reliable on temperature and sky cover, with timing that can shift by an hour or two. Days three and four are dependable for the overall pattern. Beyond that, treat the numbers as a planning direction rather than a promise — we label confidence on every day so you can judge for yourself.
- What is the best day this week in Keystone 57751, South Dakota?
- No day in the current outlook has a rain chance above 40%, so conditions look favorable for outdoor plans across the week.
- Where does this forecast come from?
- Forecast values come from national weather model data, and official warnings come from the National Weather Service. We show the source and the last-updated time on every page, and we never invent a number the source did not publish — missing measurements are hidden, not guessed.
- How often is this page updated?
- The forecast refreshes whenever the source model publishes new data, typically several times a day. The freshness note near the top of the page shows exactly when the numbers you are looking at were issued.
More weather for Keystone 57751, South Dakota
- Current weather in Keystone 57751, South Dakota
- Keystone 57751, South Dakota hourly forecast
- Keystone 57751, South Dakota weather tomorrow
- Keystone 57751, South Dakota weekend weather
- Keystone 57751, South Dakota weather radar
- Keystone 57751, South Dakota severe weather alerts
- Best time to go outside in Keystone 57751, South Dakota
- What happened overnight in Keystone 57751, South Dakota
- How accurate is the Keystone 57751, South Dakota forecast?
- Keystone 57751, South Dakota monthly weather averages
Weather in nearby cities
- Fort Collins, CO weather · about 243 miles away
- Billings, MT weather · about 282 miles away
- Boulder, CO weather · about 284 miles away
- Thornton, CO weather · about 289 miles away
- Westminster, CO weather · about 292 miles away
- Arvada, CO weather · about 295 miles away