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As of 18:00 CDT

Weather in Alton, IL

73°Current weather

Alton, Wednesday, 28 October, 18:00

Clear. Feels like 72°. High 77°, low 51°.

Pressure30.12 inHg
Wind7.7 mph SE
Humidity54%
Visibility6.2 mi
Dew point55°

10-day forecast for Alton, IL: 40° to 78°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.

78°
Best day: Thursday, October 29
61° · 0.94 in
Worst day: Wednesday, November 4

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

Thu, 2978° / 53°0Mostly clear
MorningMostly clear55°feels 54°
AfternoonClear75°feels 75°
EveningClear64°feels 64°
OvernightClear56°feels 55°
78 °Mostly clear

Alton, Thursday, 29 October

Mostly clear. High 78°, low 53°.

Pressure30.15 inHg
Wind6.2 mph SW
Humidity60%
Visibility6.2 mi
Dew point58°
Fri, 3071° / 55°0.04Light rain
MorningOvercast60°feels 60°
AfternoonLight rain68°feels 69°
EveningOvercast64°feels 64°
OvernightOvercast58°feels 58°
71 °Light rain

Alton, Friday, 30 October

Light rain. High 71°, low 55°.

Pressure30.24 inHg
Wind8.9 mph SE
Humidity86%
Visibility6.2 mi
Dew point62°
Sat, 3171° / 59°0Overcast
MorningOvercast59°feels 59°
AfternoonOvercast69°feels 69°
EveningOvercast64°feels 64°
OvernightOvercast61°feels 61°
71 °Overcast

Alton, Saturday, 31 October

Overcast. High 71°, low 59°.

Pressure30.27 inHg
Wind3.8 mph NW
Humidity69%
Visibility6.2 mi
Dew point57°
Sun, 0171° / 56°0Overcast
MorningOvercast58°feels 58°
AfternoonOvercast71°feels 70°
EveningOvercast63°feels 63°
OvernightOvercast58°feels 58°
71 °Overcast

Alton, Sunday, 1 November

Overcast. High 71°, low 56°.

Pressure30.27 inHg
Wind5.4 mph SE
Humidity68%
Visibility6.2 mi
Dew point57°
Mon, 0268° / 56°0.03Light rain
MorningLight rain58°feels 58°
AfternoonLight rain64°feels 63°
EveningLight rain64°feels 63°
OvernightLight rain63°feels 63°
68 °Light rain

Alton, Monday, 2 November

Light rain. High 68°, low 56°.

Pressure30.06 inHg
Wind13.6 mph SE
Humidity71%
Visibility—
Dew point53°
Tue, 0364° / 60°0.63Rain
MorningRain62°feels 63°
AfternoonRain62°feels 62°
EveningRain60°feels 60°
OvernightRain61°feels 61°
64 °Rain

Alton, Tuesday, 3 November

Rain. High 64°, low 60°.

Pressure29.83 inHg
Wind15.8 mph SE
Humidity93%
Visibility—
Dew point60°
Wed, 0461° / 59°0.94Rain
MorningRain60°feels 60°
AfternoonRain60°feels 61°
EveningRain61°feels 61°
OvernightRain60°feels 60°
61 °Rain

Alton, Wednesday, 4 November

Rain. High 61°, low 59°.

Pressure29.65 inHg
Wind13.1 mph E
Humidity96%
Visibility—
Dew point59°
Thu, 0560° / 51°0.45Rain
MorningRain60°feels 60°
AfternoonRain59°feels 58°
EveningRain57°feels 56°
OvernightRain53°feels 52°
60 °Rain

Alton, Thursday, 5 November

Rain. High 60°, low 51°.

Pressure29.47 inHg
Wind15.6 mph NW
Humidity91%
Visibility—
Dew point56°
Fri, 0653° / 40°0Partly cloudy
MorningPartly cloudy43°feels 38°
AfternoonPartly cloudy50°feels 47°
EveningPartly cloudy47°feels 44°
OvernightPartly cloudy44°feels 40°
53 °Partly cloudy

Alton, Friday, 6 November

Partly cloudy. High 53°, low 40°.

Pressure29.94 inHg
Wind11.9 mph NW
Humidity45%
Visibility—
Dew point28°

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.