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As of 21:21 CST

Weather in Alton, IL

51°Current weather

Alton, Wednesday, 11 November, 21:21

Clear. Feels like 50°. High 69°, low 45°.

Pressure29.88 inHg
Wind12.7 mph N
Humidity82%
Visibility6.2 mi
Dew point46°

10-day forecast for Alton, IL: 31° to 69°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.

69°
Best day: Wednesday, November 11
46°
Worst day: Saturday, November 14

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

Thu, 1253° / 36°0Overcast
MorningMostly clear49°feels 44°
AfternoonOvercast51°feels 49°
EveningOvercast39°feels 32°
OvernightOvercast46°feels 43°
53 °Overcast

Alton, Thursday, 12 November

Overcast. High 53°, low 36°.

Pressure30.00 inHg
Wind13.6 mph NW
Humidity55%
Visibility6.2 mi
Dew point31°
Fri, 1347° / 32°0Overcast
MorningOvercast40°feels 33°
AfternoonOvercast42°feels 35°
EveningOvercast40°feels 35°
OvernightClear34°feels 27°
47 °Overcast

Alton, Friday, 13 November

Overcast. High 47°, low 32°.

Pressure30.12 inHg
Wind11.5 mph N
Humidity63%
Visibility6.2 mi
Dew point25°
Sat, 1446° / 31°0Clear
MorningClear34°feels 30°
AfternoonClear46°feels 44°
EveningClear36°feels 36°
OvernightClear34°feels 29°
46 °Clear

Alton, Saturday, 14 November

Clear. High 46°, low 31°.

Pressure30.33 inHg
Wind4.3 mph N
Humidity58%
Visibility6.2 mi
Dew point26°
Sun, 1549° / 32°0Overcast
MorningClear38°feels 38°
AfternoonOvercast49°feels 49°
EveningClear40°feels 40°
OvernightClear33°feels 33°
49 °Overcast

Alton, Sunday, 15 November

Overcast. High 49°, low 32°.

Pressure30.45 inHg
Wind1.9 mph S
Humidity52%
Visibility6.2 mi
Dew point28°
Mon, 1653° / 33°0Clear
MorningClear39°feels 36°
AfternoonClear50°feels 47°
EveningClear43°feels 40°
OvernightClear39°feels 35°
53 °Clear

Alton, Monday, 16 November

Clear. High 53°, low 33°.

Pressure30.47 inHg
Wind5.8 mph S
Humidity48%
Visibility—
Dew point30°
Tue, 1756° / 36°0Clear
MorningClear41°feels 37°
AfternoonClear53°feels 50°
EveningClear46°feels 43°
OvernightClear42°feels 38°
56 °Clear

Alton, Tuesday, 17 November

Clear. High 56°, low 36°.

Pressure30.45 inHg
Wind7 mph SE
Humidity48%
Visibility—
Dew point32°
Wed, 1860° / 38°0Clear
MorningClear43°feels 39°
AfternoonClear55°feels 52°
EveningClear50°feels 46°
OvernightClear45°feels 41°
60 °Clear

Alton, Wednesday, 18 November

Clear. High 60°, low 38°.

Pressure30.36 inHg
Wind8.9 mph S
Humidity34%
Visibility—
Dew point26°
Thu, 1961° / 41°0Overcast
MorningOvercast46°feels 42°
AfternoonOvercast58°feels 55°
EveningOvercast52°feels 49°
OvernightOvercast48°feels 45°
61 °Overcast

Alton, Thursday, 19 November

Overcast. High 61°, low 41°.

Pressure30.24 inHg
Wind10.2 mph S
Humidity33%
Visibility—
Dew point27°
Fri, 2066° / 48°0Overcast
MorningOvercast53°feels 50°
AfternoonOvercast62°feels 60°
EveningOvercast58°feels 57°
OvernightOvercast53°feels 51°
66 °Overcast

Alton, Friday, 20 November

Overcast. High 66°, low 48°.

Pressure30.12 inHg
Wind9.3 mph SW
Humidity48%
Visibility—
Dew point41°

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.