Union County, SD Weather Forecast
County weather hub
Partly Sunny
Compare major city weather across Union County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Partly sunny, with a high near 53.
County Weather Overview
This county weather page brings together forecast coverage for Union County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 3 of 3 mapped cities in Union County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Nov 6 to Nov 7, 2026
- Latest sync
- Nov 1, 2026 4:57 PM CST
- Forecast office
- FSD
- Source
- NOAA / NWS
Daily Outlook
This Week in Union County
Saturday looks like the warmest upcoming period in Union County at 56 degrees F.
Friday Night is the coolest period ahead with temperatures near 38 degrees F.
The strongest winds are forecast for Friday at about 5 mph W.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Nov 1, 2026 4:57 PM CST
- Coverage
- 3 days
- Time zone
- America/Chicago
- Forecast office
- FSD
- Radar station
- KFSD
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 38.
Partly sunny, with a high near 56.
A slight chance of rain showers before midnight. Partly cloudy, with a low around 41.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Nov 6
|
Partly Sunny
|
53°F |
5 mph
W
|
|
Friday Night
Nov 6
|
Partly Cloudy
|
38°F |
5 mph
S
|
|
Saturday
Nov 7
|
Partly Sunny
|
56°F |
5 mph
W
|
|
Saturday Night
Nov 7
|
Slight Chance Rain Showers then Partly Cloudy
|
41°F |
5 mph
NW
|
Major City Forecasts
Live forecast snapshots for major cities across Union County.
Coverage
Forecast coverage currently spans 3 of 3 mapped cities in Union County.
Largest mapped city population in this region: 2,928.
