Union, IL Weather Forecast
Local 7-day forecast
Areas Of Smoke
Track current conditions, temperature changes, wind, and the full daily outlook for Union, IL in one place.
Areas of smoke. Mostly sunny, with a high near 85. East northeast wind around 7 mph.
Local Weather Overview
This forecast page for Union, IL 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: Jul 19, 2026 9:32 AM CDT.
The active forecast window currently covers Jul 19 to Jul 25, 2026 for Union, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 19 to Jul 25, 2026
- Latest sync
- Jul 19, 2026 9:32 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Union
Tuesday looks like the warmest upcoming period in Union at 90 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 59 degrees F.
The strongest winds are forecast for Tuesday at about 8 to 14 mph WNW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 19, 2026 9:32 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Patchy smoke. Mostly clear, with a low around 65. East wind 3 to 7 mph.
Patchy smoke before 1pm. Sunny, with a high near 88. South southeast wind 3 to 7 mph.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. South southwest wind around 9 mph, with gusts as high as 16 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms before 1pm. Sunny, with a high near 90. West northwest wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly clear, with a low around 66. North northwest wind 7 to 14 mph, with gusts as high as 21 mph.
Sunny, with a high near 80. North wind around 10 mph, with gusts as high as 16 mph.
Mostly clear, with a low around 59.
Sunny, with a high near 81.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 61.
A slight chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 81.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 86.
Mostly clear, with a low around 67.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Jul 19
|
Areas Of Smoke
|
85°F |
7 mph
ENE
|
|
Tonight
Jul 19
|
Patchy Smoke
|
65°F |
3 to 7 mph
E
|
|
Monday
Jul 20
|
Patchy Smoke
|
88°F |
3 to 7 mph
SSE
|
|
Monday Night
Jul 20
|
Partly Cloudy then Chance Showers And Thunderstorms
|
73°F |
9 mph
SSW
|
|
Tuesday
Jul 21
|
Chance Showers And Thunderstorms
|
90°F |
8 to 14 mph
WNW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
66°F |
7 to 14 mph
NNW
|
|
Wednesday
Jul 22
|
Sunny
|
80°F |
10 mph
N
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
59°F |
2 to 8 mph
NE
|
|
Thursday
Jul 23
|
Sunny
|
81°F |
5 mph
ESE
|
|
Thursday Night
Jul 23
|
Partly Cloudy then Slight Chance Rain Showers
|
61°F |
5 mph
ESE
|
|
Friday
Jul 24
|
Chance Showers And Thunderstorms
|
81°F |
3 to 7 mph
SE
|
|
Friday Night
Jul 24
|
Slight Chance Showers And Thunderstorms
|
64°F |
6 mph
SE
|
|
Saturday
Jul 25
|
Slight Chance Rain Showers then Mostly Sunny
|
86°F |
5 to 8 mph
SE
|
|
Saturday Night
Jul 25
|
Mostly Clear
|
67°F |
3 to 7 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Union.