Cities / United States / Illinois

27°

☀️ Alton weather

Clear sky. .

Feels like 31° Wind 9 km/h S Humidity 80% Pressure 1011 hPa UV 0 Air Fair ☀ 06:13 - 19:57
⚠ Extreme Heat Warning · Severe

Extreme Heat Warning issued August 13 at 10:28AM CDT until August 15 at 9:00PM CDT by NWS St Louis MO

Right now it is 27° in Alton with clear skies, it feels more like 31° and today's high is 36° with an overnight low of 26°. The sun rises at 06:13 and sets at 19:57, giving 13h 44m of daylight. Over the coming week highs range from 29° to 37°.

Alton is in Illinois, United States, sitting 150 m above sea level, with a population of about 27,000. Local time is America/Chicago (UTC−5), and every time on this page is shown in it.

Next 24 hours - temperature

25° 31° 36° 36° 26° 01:00 · 27.2° · 0 mm 02:00 · 27° · 0 mm 03:00 · 26.7° · 0 mm 04:00 · 26° · 0 mm 05:00 · 25.7° · 0 mm 06:00 · 26° · 0 mm 07:00 · 26.3° · 0 mm 08:00 · 27.5° · 0 mm 09:00 · 29.5° · 0 mm 10:00 · 30.5° · 0 mm 11:00 · 31.5° · 0 mm 12:00 · 32° · 0 mm 13:00 · 33.2° · 0 mm 14:00 · 34.6° · 0 mm 15:00 · 35.3° · 0 mm 16:00 · 35.9° · 0 mm 17:00 · 35.9° · 0 mm 18:00 · 35.6° · 0 mm 19:00 · 32.7° · 0 mm 20:00 · 30.7° · 0 mm 21:00 · 29.4° · 0 mm 22:00 · 28.6° · 0 mm 23:00 · 27.9° · 0 mm 00:00 · 27.5° · 0 mm

Precipitation

01:00 · 0 mm 01:00 02:00 · 0 mm 03:00 · 0 mm 04:00 · 0 mm 04:00 05:00 · 0 mm 06:00 · 0 mm 07:00 · 0 mm 07:00 08:00 · 0 mm 09:00 · 0 mm 10:00 · 0 mm 10:00 11:00 · 0 mm 12:00 · 0 mm 13:00 · 0 mm 13:00 14:00 · 0 mm 15:00 · 0 mm 16:00 · 0 mm 16:00 17:00 · 0 mm 18:00 · 0 mm 19:00 · 0 mm 19:00 20:00 · 0 mm 21:00 · 0 mm 22:00 · 0 mm 22:00 23:00 · 0 mm 00:00 · 0 mm

Hour by hour

TIMETEMPFEELSRAINCONDITIONS
01:00 ☀️ 27.2° 31.4° - Clear sky
02:00 ☀️ 27° 30.7° - Clear sky
03:00 ☀️ 26.7° 31.5° - Clear sky
04:00 ☀️ 26° 29.9° - Clear sky
05:00 🌤️ 25.7° 29.6° - Mostly clear
06:00 ☁️ 26° 30.2° - Overcast
07:00 ☁️ 26.3° 30.6° - Overcast
08:00 ⛅ 27.5° 31.7° - Partly cloudy
09:00 🌤️ 29.5° 33.9° - Mostly clear
10:00 ☁️ 30.5° 33.7° - Overcast
11:00 ☁️ 31.5° 34.1° - Overcast
12:00 ☁️ 32° 34.5° - Overcast

Next 16 days

Today☁️ 36°26° Sat 15☁️ 37°24° Sun 16🌧️ 31°25°1.2mm Mon 17🌦️ 31°22°0.9mm Tue 18☀️ 36°21° Wed 19⛅ 31°21° Thu 20🌧️ 29°21°18.8mm Fri 21🌧️ 23°18°5.5mm Sat 22⛅ 27°15° Sun 23☀️ 30°17° Mon 24☀️ 35°20° Tue 25☀️ 33°22° Wed 26☁️ 30°17°0.3mm Thu 27☁️ 26°18°0.4mm Fri 28🌧️ 29°18°7.7mm Sat 29☁️ 0°0°
☁️ TodayAugust 14th Avg 30° Low 26° at 05:00 High 36° at 16:00 Feels 38° Wind ~18 km/h
Clear Cloudy Clear
00:00 28°
02:00 27°
04:00 26°
06:00 26°
08:00 28°
10:00 31°
12:00 32°
14:00 35°
16:00 36°
18:00 36°
20:00 31°
22:00 29°
☁️ SaturdayAugust 15th Avg 30° Low 24° at 07:00 High 37° at 17:00 Wind ~19 km/h
Cloudy Cloudy
00:00 28°
02:00 27°
04:00 26°
06:00 25°
08:00 25°
10:00 30°
12:00 33°
14:00 35°
16:00 36°
18:00 36°
20:00 31°
22:00 30°
🌧️ SundayAugust 16th Avg 29° Low 25° at 23:00 High 31° at 13:00 1.2 mm rain Feels 36° Wind ~21 km/h
Cloudy
00:00 30°
02:00 30°
04:00 29°
06:00 27°
08:00 27°
10:00 27°
12:00 30°
14:00 30°
16:00 29°
18:00 31°
20:00 28°
22:00 27° 1mm
🌦️ MondayAugust 17th Avg 26° Low 22° at 06:00 High 31° at 14:00 0.9 mm rain Feels 34° Wind ~15 km/h
Cloudy Clear Cloudy
00:00 24°
02:00 24°
04:00 23°
06:00 22°
08:00 24°
10:00 27°
12:00 30°
14:00 31°
16:00 30°
18:00 28°
20:00 26°
22:00 24°
☀️ TuesdayAugust 18th Avg 28° Low 21° at 06:00 High 36° at 17:00 Feels 40° Wind ~19 km/h
Cloudy Clear Clear
00:00 24°
02:00 23°
04:00 22°
06:00 21°
08:00 24°
10:00 28°
12:00 32°
14:00 34°
16:00 36°
18:00 36°
20:00 31°
22:00 28°
⛅ WednesdayAugust 19th Avg 27° Low 21° at 05:00 High 31° at 15:00 Feels 33° Wind ~24 km/h
Cloudy Partly Cloudy Clear Partly Cloudy Cloudy
00:00 30°
02:00 28°
04:00 22°
06:00 21°
08:00 23°
10:00 27°
12:00 29°
14:00 31°
16:00 31°
18:00 29°
20:00 26°
22:00 25°
🌧️ ThursdayAugust 20th Avg 24° Low 21° at 06:00 High 29° at 16:00 18.8 mm rain Wind ~22 km/h
Rain Cloudy Rain
00:00 23°
02:00 22° 0.3mm
04:00 22° 0.3mm
06:00 21° 0.8mm
08:00 22° 0.9mm
10:00 25° 0.9mm
12:00 25° 0.2mm
14:00 27°
16:00 29°
18:00 27° 0.2mm
20:00 25° 3.2mm
22:00 22° 3.2mm
🌧️ FridayAugust 21st Avg 21° Low 18° at 23:00 High 23° at 12:00 5.5 mm rain Wind ~26 km/h
Rain Cloudy Rain Cloudy
00:00 22° 2mm
02:00 22° 0.3mm
04:00 21° 0.3mm
06:00 22° 0.1mm
08:00 22°
10:00 22°
12:00 23° 0.1mm
14:00 22°
16:00 20°
18:00 19°
20:00 19°
22:00 19°
⛅ SaturdayAugust 22nd Avg 21° Low 15° at 06:00 High 27° at 16:00 Wind ~15 km/h
Partly Cloudy Clear Partly Cloudy Clear
00:00 17°
02:00 16°
04:00 16°
06:00 15°
08:00 17°
10:00 22°
12:00 25°
14:00 26°
16:00 27°
18:00 26°
20:00 23°
22:00 21°
☀️ SundayAugust 23rd Avg 23° Low 17° at 06:00 High 30° at 15:00 Wind ~15 km/h
Clear
00:00 19°
02:00 18°
04:00 18°
06:00 17°
08:00 20°
10:00 25°
12:00 28°
14:00 30°
16:00 30°
18:00 27°
20:00 24°
22:00 22°
☀️ MondayAugust 24th Avg 26° Low 20° at 06:00 High 35° at 16:00 Feels 37° Wind ~15 km/h
Clear
00:00 21°
02:00 21°
04:00 20°
06:00 20°
08:00 22°
10:00 27°
12:00 31°
14:00 34°
16:00 35°
18:00 31°
20:00 28°
22:00 26°
☀️ TuesdayAugust 25th Avg 27° Low 22° at 23:00 High 33° at 15:00 Feels 35° Wind ~17 km/h
Partly Cloudy Clear Clear
00:00 25°
02:00 24°
04:00 24°
06:00 23°
08:00 25°
10:00 29°
12:00 32°
14:00 33°
16:00 33°
18:00 31°
20:00 27°
22:00 24°
☁️ WednesdayAugust 26th Avg 23° Low 17° at 06:00 High 30° at 16:00 0.3 mm rain Wind ~22 km/h
Cloudy Partly Cloudy Cloudy Rain
00:00 22°
02:00 20°
04:00 19°
06:00 17°
08:00 19°
10:00 24°
12:00 27°
14:00 29°
16:00 30°
18:00 27° 0.1mm
20:00 23°
22:00 21°
☁️ ThursdayAugust 27th Avg 23° Low 18° at 07:00 High 26° at 13:00 0.4 mm rain Wind ~17 km/h
Cloudy Partly Cloudy Cloudy Rain
00:00 21°
02:00 21°
04:00 20°
06:00 18°
08:00 20°
10:00 25°
12:00 26°
14:00 26°
16:00 26°
18:00 25°
20:00 23° 0.1mm
22:00 21° 0.1mm
🌧️ FridayAugust 28th Avg 23° Low 18° at 05:00 High 29° at 15:00 7.7 mm rain Feels 27° Wind ~19 km/h
Rain Clear
00:00 20° 0.1mm
02:00 19° 1.1mm
04:00 18° 1.1mm
06:00 18° 1mm
08:00 20° 0.4mm
10:00 22° 0.4mm
12:00 26°
14:00 28°
16:00 28°
18:00 26°
20:00 24°
22:00 22°
☁️ SaturdayAugust 29th Avg 20° Low 0° at 06:00 High 0° at 15:00 Feels 22° Wind ~19 km/h
Clear Cloudy Unknown
00:00 19°
02:00 17°
04:00 16°
06:00 14°
08:00 16°
10:00 21°
12:00 24°
14:00 25°
16:00 25°
18:00 22°
20:00 0°
22:00 0°

Sun

☀️ Sunrise 06:13 · Sunset 19:57

13h 44m of daylight · America/Chicago

Air quality

PM2.5 11.4 µg/m³ - Fair

Fine for almost everyone; unusually sensitive people may notice it on a long run.

Source: Copernicus CAMS, updated hourly.

Nearby

Fairmont · 3.3 km North Alton · 3.7 km Upper Alton · 3.7 km Milton · 3.8 km Kic-ka-poo Village (historical) · 3.9 km Sloan · 4.2 km

Tools for Alton

☔ Will it rain today? 🌅 Sunrise & sunset 🫁 Air quality 📼 Weather on this day

Common questions about Alton weather

Will it rain in Alton today?

No rain is in the forecast for Alton today.

What is the temperature in Alton right now?

It is 27° in Alton right now, though it feels closer to 31°. Today runs between a low of 26° and a high of 36°.

What time is sunrise and sunset in Alton?

The sun rises at 06:13 and sets at 19:57 local time in Alton today, giving 13h 44m of daylight.

What is the air quality in Alton?

PM2.5 in Alton is currently 11.4 µg/m³, which counts as Fair on the European air-quality index. Fine for almost everyone; unusually sensitive people may notice it on a long run.

How accurate is the Alton forecast, and how far ahead does it go?

This page shows 16 days ahead, refreshed every hour. It blends ECMWF, NOAA GFS and whichever national high-resolution model covers Alton best. The first three days are the dependable part - day one is usually within a degree or two - and accuracy falls off steadily after day five, so read the far end as a trend rather than a plan. We publish our measured error against real station observations on the accuracy page.

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