Dewey County, SD Weather Forecast
County weather hub
Mostly Clear
Compare major city weather across Dewey County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly clear. Low around 46, with temperatures rising to around 50 overnight. South southeast wind around 18 mph.
County Weather Overview
This county weather page brings together forecast coverage for Dewey County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 1 of 1 mapped cities in Dewey County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 16 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 3:59 AM MDT
- Forecast office
- ABR
- Source
- NOAA / NWS
Daily Outlook
This Week in Dewey County
Thursday looks like the warmest upcoming period in Dewey County at 73 degrees F.
Friday Night is the coolest period ahead with temperatures near 22 degrees F.
The strongest winds are forecast for Friday at about 29 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 3:59 AM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- ABR
- Radar station
- KBIS
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly sunny, with a high near 73. West southwest wind 15 to 20 mph, with gusts as high as 29 mph.
Rain showers before 2am, then a chance of rain and snow showers between 2am and 3am, then a chance of rain and snow showers. Mostly cloudy, with a low around 30. North northwest wind 18 to 28 mph, with gusts as high as 36 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
A slight chance of snow showers before 8am, then a slight chance of freezing rain between 8am and 9am, then a slight chance of snow showers between 9am and noon. Mostly cloudy, with a high near 42. Northwest wind around 29 mph, with gusts as high as 37 mph. Chance of precipitation is 20%. New snow accumulation of less than half an inch possible.
Partly cloudy, with a low around 22. Northwest wind 15 to 28 mph, with gusts as high as 36 mph.
Sunny, with a high near 49. Northwest wind 15 to 22 mph, with gusts as high as 30 mph.
Mostly clear, with a low around 28. West northwest wind 6 to 20 mph.
Sunny, with a high near 58. East northeast wind 7 to 13 mph.
Clear, with a low around 35. Southeast wind around 16 mph, with gusts as high as 24 mph.
Sunny, with a high near 72.
Mostly clear, with a low around 42.
Sunny, with a high near 73.
Mostly clear, with a low around 47.
A chance of rain showers. Mostly sunny, with a high near 72. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 16
|
Mostly Clear
|
46°F |
18 mph
SSE
|
|
Thursday
Apr 16
|
Mostly Sunny
|
73°F |
15 to 20 mph
WSW
|
|
Thursday Night
Apr 16
|
Rain Showers
|
30°F |
18 to 28 mph
NNW
|
|
Friday
Apr 17
|
Slight Chance Snow Showers then Mostly Cloudy
|
42°F |
29 mph
NW
|
|
Friday Night
Apr 17
|
Partly Cloudy
|
22°F |
15 to 28 mph
NW
|
|
Saturday
Apr 18
|
Sunny
|
49°F |
15 to 22 mph
NW
|
|
Saturday Night
Apr 18
|
Mostly Clear
|
28°F |
6 to 20 mph
WNW
|
|
Sunday
Apr 19
|
Sunny
|
58°F |
7 to 13 mph
ENE
|
|
Sunday Night
Apr 19
|
Clear
|
35°F |
16 mph
SE
|
|
Monday
Apr 20
|
Sunny
|
72°F |
16 mph
SSW
|
|
Monday Night
Apr 20
|
Mostly Clear
|
42°F |
10 to 15 mph
NE
|
|
Tuesday
Apr 21
|
Sunny
|
73°F |
10 to 15 mph
E
|
|
Tuesday Night
Apr 21
|
Mostly Clear
|
47°F |
16 mph
ESE
|
|
Wednesday
Apr 22
|
Chance Rain Showers
|
72°F |
16 to 22 mph
ESE
|
Major City Forecasts
Live forecast snapshots for major cities across Dewey County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Dewey County.
Largest mapped city population in this region: 1,418.
