Union County, IL Weather Forecast
County weather hub
Showers And Thunderstorms Likely
Compare major city weather across Union County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Showers and thunderstorms likely. Mostly sunny, with a high near 90. Southwest wind 5 to 8 mph.
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 2 of 2 mapped cities in Union County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 10 to Jul 11, 2026
- Latest sync
- Jul 5, 2026 12:11 AM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Union County
Friday looks like the warmest upcoming period in Union County at 90 degrees F.
Friday Night is the coolest period ahead with temperatures near 73 degrees F.
The strongest winds are forecast for Friday at about 5 to 8 mph SW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 5, 2026 12:11 AM CDT
- Coverage
- 2 days
- Time zone
- America/Chicago
- Forecast office
- PAH
- Radar station
- KPAH
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind 3 to 7 mph.
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Southwest wind around 6 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 10
|
Showers And Thunderstorms Likely
|
90°F |
5 to 8 mph
SW
|
|
Friday Night
Jul 10
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
73°F |
3 to 7 mph
SSW
|
|
Saturday
Jul 11
|
Chance Showers And Thunderstorms
|
89°F |
6 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across Union County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Union County.
Largest mapped city population in this region: 4,059.