10-day forecast for Union, IL: 54° to 84°, with precipitation expected on 4 days. The table below breaks each day into morning, afternoon, evening and overnight.
82°
Best day: Saturday, August 8
84° · 1.41 in
Worst day: Sunday, August 9
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0984° / 63°1.41
Morning70°feels 71°
Afternoon75°feels 77°
Evening81°feels 87°
Overnight66°feels 67°
84 °
Union, Sunday, 9 August
Heavy rain. High 84°, low 63°.
Pressure29.91 inHg
Wind8.7 mph SE
Humidity94%
Visibility6.2 mi
Dew point64°
Mon, 1084° / 69°0.12
Morning69°feels 70°
Afternoon83°feels 90°
Evening77°feels 78°
Overnight74°feels 76°
84 °
Union, Monday, 10 August
Rain. High 84°, low 69°.
Pressure29.91 inHg
Wind7.7 mph SE
Humidity85%
Visibility6.2 mi
Dew point72°
Tue, 1182° / 68°0.58
Morning72°feels 73°
Afternoon71°feels 72°
Evening71°feels 72°
Overnight71°feels 72°
82 °
Union, Tuesday, 11 August
Rain. High 82°, low 68°.
Pressure29.83 inHg
Wind8.9 mph N
Humidity92%
Visibility6.2 mi
Dew point73°
Wed, 1283° / 64°0.01
Morning68°feels 69°
Afternoon82°feels 85°
Evening76°feels 78°
Overnight65°feels 66°
83 °
Union, Wednesday, 12 August
Light rain. High 83°, low 64°.
Pressure29.88 inHg
Wind3.8 mph W
Humidity77%
Visibility6.2 mi
Dew point68°
Thu, 1369° / 58°0.06
Morning64°feels 64°
Afternoon67°feels 68°
Evening65°feels 65°
Overnight59°feels 58°
69 °
Union, Thursday, 13 August
Light rain. High 69°, low 58°.
Pressure29.97 inHg
Wind11.7 mph NE
Humidity82%
Visibility—
Dew point61°
Fri, 1472° / 54°0
Morning60°feels 60°
Afternoon71°feels 71°
Evening66°feels 66°
Overnight58°feels 57°
72 °
Union, Friday, 14 August
Clear. High 72°, low 54°.
Pressure30.18 inHg
Wind6.2 mph SE
Humidity57%
Visibility—
Dew point54°
Sat, 1573° / 55°0
Morning61°feels 60°
Afternoon72°feels 71°
Evening67°feels 67°
Overnight59°feels 59°
73 °
Union, Saturday, 15 August
Overcast. High 73°, low 55°.
Pressure30.33 inHg
Wind6.7 mph S
Humidity59%
Visibility—
Dew point55°
Sun, 1675° / 56°0
Morning62°feels 62°
Afternoon73°feels 74°
Evening71°feels 71°
Overnight64°feels 64°
75 °
Union, Sunday, 16 August
Partly cloudy. High 75°, low 56°.
Pressure30.18 inHg
Wind11.6 mph S
Humidity65%
Visibility—
Dew point59°
Mon, 1778° / 65°0.01
Morning68°feels 68°
Afternoon73°feels 74°
Evening75°feels 76°
Overnight71°feels 72°
78 °
Union, Monday, 17 August
Light rain. High 78°, low 65°.
Pressure30.00 inHg
Wind8.6 mph S
Humidity86%
Visibility—
Dew point67°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Union, IL around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.