10-day forecast for East Alton, IL: 71° to 104°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
104°
Best day: Saturday, August 15
94° · 0.23 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1099° / 77°0
Morning82°feels 86°
Afternoon97°feels 103°
Evening91°feels 95°
Overnight84°feels 88°
99 °
East Alton, Monday, 10 August
Light rain. High 99°, low 77°.
Pressure29.94 inHg
Wind10.4 mph SW
Humidity45%
Visibility6.2 mi
Dew point69°
Tue, 11101° / 79°0.03
Morning82°feels 85°
Afternoon100°feels 106°
Evening91°feels 92°
Overnight83°feels 84°
101 °
East Alton, Tuesday, 11 August
Light rain. High 101°, low 79°.
Pressure29.85 inHg
Wind12.9 mph SW
Humidity43%
Visibility6.2 mi
Dew point69°
Wed, 1294° / 77°0.04
Morning78°feels 79°
Afternoon94°feels 98°
Evening78°feels 80°
Overnight78°feels 79°
94 °
East Alton, Wednesday, 12 August
Light rain. High 94°, low 77°.
Pressure29.85 inHg
Wind7 mph W
Humidity54%
Visibility6.2 mi
Dew point71°
Thu, 1394° / 71°0.23
Morning73°feels 74°
Afternoon92°feels 100°
Evening86°feels 92°
Overnight74°feels 75°
94 °
East Alton, Thursday, 13 August
Rain. High 94°, low 71°.
Pressure29.91 inHg
Wind11.6 mph S
Humidity63%
Visibility6.2 mi
Dew point72°
Fri, 1497° / 78°0
Morning81°feels 83°
Afternoon87°feels 94°
Evening88°feels 99°
Overnight85°feels 87°
97 °
East Alton, Friday, 14 August
Overcast. High 97°, low 78°.
Pressure29.94 inHg
Wind9.8 mph SE
Humidity59%
Visibility—
Dew point70°
Sat, 15104° / 81°0
Morning86°feels 88°
Afternoon99°feels 103°
Evening94°feels 97°
Overnight88°feels 87°
104 °
East Alton, Saturday, 15 August
Clear. High 104°, low 81°.
Pressure29.94 inHg
Wind11 mph SW
Humidity32%
Visibility—
Dew point63°
Sun, 1692° / 78°0
Morning83°feels 85°
Afternoon90°feels 99°
Evening82°feels 87°
Overnight78°feels 79°
92 °
East Alton, Sunday, 16 August
Clear. High 92°, low 78°.
Pressure29.97 inHg
Wind12.4 mph SW
Humidity55%
Visibility—
Dew point71°
Mon, 17100° / 71°0.05
Morning76°feels 79°
Afternoon90°feels 98°
Evening89°feels 98°
Overnight84°feels 87°
100 °
East Alton, Monday, 17 August
Light rain. High 100°, low 71°.
Pressure29.94 inHg
Wind11.5 mph E
Humidity57%
Visibility—
Dew point70°
Tue, 18100° / 84°0
Morning88°feels 88°
Afternoon96°feels 99°
Evening88°feels 94°
Overnight84°feels 86°
100 °
East Alton, Tuesday, 18 August
Overcast. High 100°, low 84°.
Pressure29.88 inHg
Wind13.9 mph SW
Humidity34%
Visibility—
Dew point62°
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 East Alton, 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.