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As of 20:39 CDT

Weather in Alton, IL

66°Current weather

Alton, Sunday, 25 October, 20:39

Overcast. Feels like 66°. High 78°, low 48°.

Pressure30.33 inHg
Wind4.6 mph SE
Humidity68%
Visibility6.2 mi
Dew point55°

10-day forecast for Alton, IL: 48° to 78°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.

78°
Best day: Sunday, October 25
62° · 0.34 in
Worst day: Sunday, November 1

Tap any day below to see morning, afternoon, evening and overnight.

Mon, 2677° / 54°0Overcast
MorningOvercast56°feels 56°
AfternoonOvercast75°feels 74°
EveningPartly cloudy59°feels 58°
OvernightOvercast56°feels 55°
77 °Overcast

Alton, Monday, 26 October

Overcast. High 77°, low 54°.

Pressure30.33 inHg
Wind3.7 mph SW
Humidity52%
Visibility6.2 mi
Dew point52°
Tue, 2774° / 51°0Overcast
MorningOvercast54°feels 54°
AfternoonOvercast70°feels 69°
EveningOvercast60°feels 59°
OvernightOvercast55°feels 54°
74 °Overcast

Alton, Tuesday, 27 October

Overcast. High 74°, low 51°.

Pressure30.24 inHg
Wind5.7 mph S
Humidity58%
Visibility6.2 mi
Dew point52°
Wed, 2873° / 55°0Light rain
MorningMostly clear56°feels 56°
AfternoonClear73°feels 72°
EveningClear63°feels 62°
OvernightOvercast56°feels 56°
73 °Light rain

Alton, Wednesday, 28 October

Light rain. High 73°, low 55°.

Pressure30.21 inHg
Wind6.2 mph S
Humidity53%
Visibility6.2 mi
Dew point52°
Thu, 2977° / 57°0Partly cloudy
MorningClear60°feels 59°
AfternoonMostly clear76°feels 76°
EveningPartly cloudy68°feels 68°
OvernightClear58°feels 58°
77 °Partly cloudy

Alton, Thursday, 29 October

Partly cloudy. High 77°, low 57°.

Pressure30.15 inHg
Wind5.7 mph SW
Humidity55%
Visibility6.2 mi
Dew point55°
Fri, 3076° / 58°0Overcast
MorningOvercast63°feels 63°
AfternoonOvercast74°feels 74°
EveningOvercast68°feels 67°
OvernightOvercast64°feels 64°
76 °Overcast

Alton, Friday, 30 October

Overcast. High 76°, low 58°.

Pressure30.12 inHg
Wind6.2 mph SE
Humidity52%
Visibility—
Dew point54°
Sat, 3170° / 61°0Overcast
MorningOvercast62°feels 62°
AfternoonOvercast66°feels 65°
EveningOvercast65°feels 64°
OvernightOvercast63°feels 62°
70 °Overcast

Alton, Saturday, 31 October

Overcast. High 70°, low 61°.

Pressure30.15 inHg
Wind9.3 mph E
Humidity63%
Visibility—
Dew point52°
Sun, 0162° / 58°0.34Rain
MorningRain61°feels 60°
AfternoonRain61°feels 60°
EveningRain59°feels 58°
OvernightRain59°feels 58°
62 °Rain

Alton, Sunday, 1 November

Rain. High 62°, low 58°.

Pressure30.00 inHg
Wind11.9 mph E
Humidity63%
Visibility—
Dew point49°
Mon, 0261° / 57°0.12Light rain
MorningLight rain58°feels 58°
AfternoonLight rain59°feels 58°
EveningLight rain57°feels 56°
OvernightLight rain57°feels 56°
61 °Light rain

Alton, Monday, 2 November

Light rain. High 61°, low 57°.

Pressure29.88 inHg
Wind10.7 mph NE
Humidity75%
Visibility—
Dew point51°
Tue, 0368° / 51°0Partly cloudy
MorningPartly cloudy55°feels 53°
AfternoonPartly cloudy65°feels 63°
EveningPartly cloudy60°feels 58°
OvernightPartly cloudy56°feels 55°
68 °Partly cloudy

Alton, Tuesday, 3 November

Partly cloudy. High 68°, low 51°.

Pressure30.09 inHg
Wind7.2 mph NW
Humidity42%
Visibility—
Dew point40°

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 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.