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As of 12:54 CST

Weather in Alton, IL

48°Current weather

Alton, Thursday, 12 November, 12:54

Overcast. Feels like 42°. High 49°, low 41°.

Pressure29.97 inHg
Wind16.1 mph NW
Humidity69%
Visibility6.2 mi
Dew point37°

10-day forecast for Alton, IL: 30° to 71°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.

69°
Best day: Saturday, November 21
46°
Worst day: Saturday, November 14

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

Fri, 1348° / 40°0Overcast
MorningOvercast43°feels 38°
AfternoonOvercast46°feels 40°
EveningOvercast42°feels 38°
OvernightMostly clear40°feels 34°
48 °Overcast

Alton, Friday, 13 November

Overcast. High 48°, low 40°.

Pressure30.12 inHg
Wind11.5 mph N
Humidity62%
Visibility6.2 mi
Dew point25°
Sat, 1446° / 31°0Clear
MorningClear34°feels 30°
AfternoonClear46°feels 46°
EveningClear36°feels 36°
OvernightClear35°feels 30°
46 °Clear

Alton, Saturday, 14 November

Clear. High 46°, low 31°.

Pressure30.33 inHg
Wind3.5 mph N
Humidity58%
Visibility6.2 mi
Dew point26°
Sun, 1549° / 30°0Overcast
MorningOvercast35°feels 33°
AfternoonOvercast49°feels 49°
EveningMostly clear38°feels 38°
OvernightMostly clear33°feels 33°
49 °Overcast

Alton, Sunday, 15 November

Overcast. High 49°, low 30°.

Pressure30.47 inHg
Wind0.3 mph SE
Humidity52%
Visibility6.2 mi
Dew point29°
Mon, 1652° / 32°0Clear
MorningClear39°feels 39°
AfternoonClear49°feels 47°
EveningClear43°feels 42°
OvernightClear34°feels 34°
52 °Clear

Alton, Monday, 16 November

Clear. High 52°, low 32°.

Pressure30.50 inHg
Wind2.6 mph S
Humidity48%
Visibility6.2 mi
Dew point31°
Tue, 1754° / 35°0Clear
MorningClear40°feels 37°
AfternoonClear51°feels 49°
EveningClear44°feels 41°
OvernightClear40°feels 37°
54 °Clear

Alton, Tuesday, 17 November

Clear. High 54°, low 35°.

Pressure30.47 inHg
Wind5.2 mph SE
Humidity52%
Visibility—
Dew point33°
Wed, 1864° / 40°0Mostly clear
MorningMostly clear46°feels 42°
AfternoonMostly clear59°feels 57°
EveningMostly clear54°feels 51°
OvernightMostly clear50°feels 47°
64 °Mostly clear

Alton, Wednesday, 18 November

Mostly clear. High 64°, low 40°.

Pressure30.33 inHg
Wind12.5 mph S
Humidity37%
Visibility—
Dew point31°
Thu, 1971° / 50°0.01Light rain
MorningLight rain55°feels 53°
AfternoonLight rain65°feels 64°
EveningLight rain59°feels 58°
OvernightLight rain55°feels 53°
71 °Light rain

Alton, Thursday, 19 November

Light rain. High 71°, low 50°.

Pressure30.15 inHg
Wind14.3 mph SW
Humidity41%
Visibility—
Dew point40°
Fri, 2066° / 52°0.01Light rain
MorningLight rain56°feels 55°
AfternoonLight rain64°feels 64°
EveningLight rain57°feels 57°
OvernightLight rain56°feels 55°
66 °Light rain

Alton, Friday, 20 November

Light rain. High 66°, low 52°.

Pressure30.21 inHg
Wind9.8 mph SW
Humidity60%
Visibility—
Dew point50°
Sat, 2169° / 58°0Overcast
MorningOvercast60°feels 59°
AfternoonOvercast67°feels 65°
EveningOvercast64°feels 62°
OvernightOvercast62°feels 60°
69 °Overcast

Alton, Saturday, 21 November

Overcast. High 69°, low 58°.

Pressure30.12 inHg
Wind11.9 mph S
Humidity46%
Visibility—
Dew point44°

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.