Union County, IL Weather Forecast

County weather hub

86°

Slight Chance Rain Showers

Compare major city weather across Union County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.

Monday, August 24, 2026

Wind: 6 mph ESE

Monday

A slight chance of rain showers before 1pm. Mostly sunny, with a high near 86. East southeast wind around 6 mph.

County weather hub

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: Aug 24 to Aug 25, 2026
Latest sync: Aug 19, 2026 11:56 AM CDT
Forecast office: PAH
Source: NOAA / NWS

Next High

86°F

Monday

Next Low

67°F

Monday Night

Rain Outlook

Periods mentioning precipitation

Windiest

6 mph

Monday

Daily Outlook

Today

Aug 24

Slight Chance Rain Showers

86 °F

/ 67°F

Wind 6 mph

Tue

Aug 25

Slight Chance Showers And Thunderstorms then Sunny

89 °F

/ 68°F

Wind 6 mph

This Week in Union County

Tuesday looks like the warmest upcoming period in Union County at 89 degrees F.

Monday Night is the coolest period ahead with temperatures near 67 degrees F.

The strongest winds are forecast for Monday at about 6 mph ESE.

Precipitation is mentioned in 4 upcoming forecast periods.

Forecast Details

Last updated: Aug 19, 2026 11:56 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 source

Extended Forecast

Monday Night

Aug 24

67°F

Partly Cloudy then Slight Chance Showers And Thunderstorms

5 mph E

A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67. East wind around 5 mph.

Tuesday

Aug 25

89°F

Slight Chance Showers And Thunderstorms then Sunny

6 mph E

A slight chance of showers and thunderstorms before 7am. Sunny, with a high near 89. East wind around 6 mph.

Tuesday Night

Aug 25

68°F

Slight Chance Showers And Thunderstorms

5 mph ENE

A slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 68. East northeast wind around 5 mph.

Detailed Forecast

Period	Conditions	Temp	Wind	Details
Monday Aug 24	Slight Chance Rain Showers	86°F	6 mph ESE	A slight chance of rain showers before 1pm. Mostly sunny, with a high near 86. East southeast wind around 6 mph.
Monday Night Aug 24	Partly Cloudy then Slight Chance Showers And Thunderstorms	67°F	5 mph E	A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67. East wind around 5 mph.
Tuesday Aug 25	Slight Chance Showers And Thunderstorms then Sunny	89°F	6 mph E	A slight chance of showers and thunderstorms before 7am. Sunny, with a high near 89. East wind around 6 mph.
Tuesday Night Aug 25	Slight Chance Showers And Thunderstorms	68°F	5 mph ENE	A slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 68. East northeast wi...

Major City Forecasts

Live forecast snapshots for major cities across Union County.

Anna

Population 4,059

85°F

Patchy Fog then Mostly Sunny

Patchy Fog then Mostly Sunny

Monday

1 mph

Coverage

Tracked cities

Coverage

100%

Forecast coverage currently spans 2 of 2 mapped cities in Union County.

Largest mapped city population in this region: 4,059.

Region Links

Illinois weather

Statewide weather overview

United States weather

National weather entry point

Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.