Grindstone, SD Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Grindstone, SD in one place.
Mostly sunny. High near 85, with temperatures falling to around 83 in the afternoon. Southeast wind 9 to 21 mph, with gusts as high as 31 mph.
Local Weather Overview
This forecast page for Grindstone, 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: Sep 14, 2026 10:09 PM MDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for Grindstone, SD.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 14, 2026 10:09 PM MDT
- Forecast office
- UNR
- Source
- NOAA / NWS
Daily Outlook
This Week in Grindstone
Wednesday looks like the warmest upcoming period in Grindstone at 85 degrees F.
Sunday Night is the coolest period ahead with temperatures near 47 degrees F.
The strongest winds are forecast for Wednesday at about 9 to 21 mph SE.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 10:09 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
Partly cloudy, with a low around 53. Northeast wind 7 to 10 mph, with gusts as high as 20 mph.
A slight chance of rain showers before noon, then a slight chance of showers and thunderstorms. Mostly cloudy. High near 79, with temperatures falling to around 77 in the afternoon. East wind 8 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
A slight chance of rain showers before noon, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
A chance of rain showers. Partly sunny, with a high near 76.
A chance of showers and thunderstorms. Partly cloudy, with a low around 49.
A slight chance of rain showers. Mostly sunny, with a high near 75.
Partly cloudy, with a low around 47.
Sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Mostly Sunny
|
85°F |
9 to 21 mph
SE
|
|
Wednesday Night
Sep 16
|
Partly Cloudy
|
53°F |
7 to 10 mph
NE
|
|
Thursday
Sep 17
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
79°F |
8 to 15 mph
E
|
|
Thursday Night
Sep 17
|
Chance Showers And Thunderstorms
|
57°F |
7 to 15 mph
SE
|
|
Friday
Sep 18
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
81°F |
6 to 12 mph
NE
|
|
Friday Night
Sep 18
|
Chance Showers And Thunderstorms
|
54°F |
12 mph
N
|
|
Saturday
Sep 19
|
Chance Rain Showers
|
76°F |
13 mph
N
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms
|
49°F |
6 to 12 mph
NE
|
|
Sunday
Sep 20
|
Slight Chance Rain Showers
|
75°F |
7 to 14 mph
N
|
|
Sunday Night
Sep 20
|
Partly Cloudy
|
47°F |
6 to 14 mph
NE
|
|
Monday
Sep 21
|
Sunny
|
76°F |
6 to 12 mph
E
|
Nearby Forecasts
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