Cities / United States / Missouri

22°

⛅ O'Fallon weather

Partly cloudy. .

Feels like 23° Wind 6 km/h N Humidity 65% Pressure 1016 hPa UV 0 Air Fair ☀ 06:22 - 19:44

Right now it is 22° in O'Fallon with partly cloudy skies and today's high is 28° with an overnight low of 18°. The sun rises at 06:22 and sets at 19:44, giving 13h 22m of daylight. Over the coming week highs range from 30° to 33° - a steady stretch with little day-to-day change.

O'Fallon is in Missouri, United States, sitting 153 m above sea level. Local time is America/Chicago (UTC−5), and every time on this page is shown in it.

Next 24 hours - temperature

15° 23° 30° 30° 16° 20:00 · 22.6° · 0 mm 21:00 · 21.1° · 0 mm 22:00 · 20.1° · 0 mm 23:00 · 19.5° · 0 mm 00:00 · 18.8° · 0 mm 01:00 · 18.2° · 0 mm 02:00 · 17.8° · 0 mm 03:00 · 17.3° · 0 mm 04:00 · 16.8° · 0 mm 05:00 · 16.6° · 0 mm 06:00 · 16.1° · 0 mm 07:00 · 15.9° · 0 mm 08:00 · 18° · 0 mm 09:00 · 20.2° · 0 mm 10:00 · 22.4° · 0 mm 11:00 · 23.8° · 0 mm 12:00 · 24.8° · 0 mm 13:00 · 27.5° · 0 mm 14:00 · 28.6° · 0 mm 15:00 · 29.4° · 0 mm 16:00 · 29.6° · 0 mm 17:00 · 29.5° · 0 mm 18:00 · 28.7° · 0 mm 19:00 · 27° · 0 mm

Precipitation

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

Hour by hour

TIMETEMPFEELSRAINCONDITIONS
20:00 ☁️ 22.6° 23.2° - Overcast
21:00 ☀️ 21.1° 21.6° - Clear sky
22:00 ☁️ 20.1° 21.1° - Overcast
23:00 🌤️ 19.5° 19.9° - Mostly clear
00:00 ☁️ 18.8° 19.2° - Overcast
01:00 ☀️ 18.2° 18.8° - Clear sky
02:00 ☁️ 17.8° 18.1° - Overcast
03:00 ⛅ 17.3° 17.4° - Partly cloudy
04:00 ☁️ 16.8° 17.2° - Overcast
05:00 ☁️ 16.6° 17° - Overcast
06:00 ☀️ 16.1° 16.4° - Clear sky
07:00 ☀️ 15.9° 16.2° - Clear sky

Next 16 days

Today☀️ 28°18° Mon 24☀️ 30°16° Tue 25☁️ 31°17° Wed 26🌧️ 33°19°21.2mm Thu 27☀️ 32°21° Fri 28☀️ 32°21° Sat 29🌧️ 32°22°1.7mm Sun 30🌧️ 35°21°7mm Mon 31☀️ 33°22° Tue 1🌦️ 28°22°1.8mm Wed 2☀️ 35°23° Thu 3☁️ 29°18°0.3mm Fri 4🌦️ 31°19°2.1mm Sat 5⛅ 32°20° Sun 6🌦️ 26°20°8.7mm Mon 7🌧️ 30°19°13.8mm
☀️ TodayAugust 23rd Avg 22° Low 18° at 06:00 High 28° at 14:00 Wind ~15 km/h
Clear Cloudy
00:00 21°
02:00 20°
04:00 19°
06:00 18°
08:00 20°
10:00 23°
12:00 26°
14:00 28°
16:00 27°
18:00 25°
20:00 23°
22:00 20°
☀️ MondayAugust 24th Avg 22° Low 16° at 07:00 High 30° at 16:00 Wind ~10 km/h
Clear Clear
00:00 19°
02:00 18°
04:00 17°
06:00 16°
08:00 18°
10:00 22°
12:00 25°
14:00 29°
16:00 30°
18:00 29°
20:00 24°
22:00 22°
☁️ TuesdayAugust 25th Avg 24° Low 17° at 06:00 High 31° at 16:00 Wind ~14 km/h
Clear Cloudy Clear
00:00 20°
02:00 19°
04:00 18°
06:00 17°
08:00 19°
10:00 24°
12:00 29°
14:00 31°
16:00 31°
18:00 30°
20:00 26°
22:00 24°
🌧️ WednesdayAugust 26th Avg 25° Low 19° at 21:00 High 33° at 17:00 21.2 mm rain Wind ~21 km/h
Rain Cloudy Clear Clear Rain
00:00 24°
02:00 23°
04:00 20° 0.2mm
06:00 20° 0.7mm
08:00 21° 0.4mm
10:00 24°
12:00 27° 0.3mm
14:00 30°
16:00 32°
18:00 32°
20:00 28°
22:00 20° 6.1mm
☀️ ThursdayAugust 27th Avg 25° Low 21° at 07:00 High 32° at 16:00 Wind ~15 km/h
Clear Clear
00:00 22°
02:00 22°
04:00 21°
06:00 21°
08:00 21°
10:00 25°
12:00 29°
14:00 30°
16:00 32°
18:00 30°
20:00 26°
22:00 25°
☀️ FridayAugust 28th Avg 26° Low 21° at 06:00 High 32° at 15:00 Wind ~11 km/h
Clear Cloudy
00:00 23°
02:00 22°
04:00 22°
06:00 21°
08:00 23°
10:00 27°
12:00 30°
14:00 32°
16:00 32°
18:00 30°
20:00 27°
22:00 26°
🌧️ SaturdayAugust 29th Avg 26° Low 22° at 06:00 High 32° at 13:00 1.7 mm rain Wind ~15 km/h
Partly Cloudy Cloudy Rain
00:00 24°
02:00 23°
04:00 23°
06:00 22°
08:00 23°
10:00 25°
12:00 30°
14:00 32°
16:00 29°
18:00 30°
20:00 28° 0.2mm
22:00 25° 0.2mm
🌧️ SundayAugust 30th Avg 27° Low 21° at 07:00 High 35° at 16:00 7 mm rain Wind ~16 km/h
Cloudy Rain Clear Rain
00:00 23° 1.1mm
02:00 22°
04:00 23°
06:00 21° 1mm
08:00 22° 0.3mm
10:00 25° 0.3mm
12:00 30°
14:00 33°
16:00 35°
18:00 33°
20:00 29° 0.3mm
22:00 24° 0.3mm
☀️ MondayAugust 31st Avg 27° Low 22° at 06:00 High 33° at 16:00 Wind ~12 km/h
Clear Cloudy
00:00 25°
02:00 24°
04:00 23°
06:00 22°
08:00 23°
10:00 27°
12:00 30°
14:00 33°
16:00 33°
18:00 31°
20:00 29°
22:00 27°
🌦️ TuesdaySeptember 1st Avg 25° Low 22° at 06:00 High 28° at 16:00 1.8 mm rain Wind ~26 km/h
Clear Rain Cloudy Rain Cloudy
00:00 25°
02:00 24°
04:00 23°
06:00 22° 0.1mm
08:00 23° 0.4mm
10:00 25° 0.4mm
12:00 26°
14:00 27° 0.1mm
16:00 28° 0.1mm
18:00 26°
20:00 26°
22:00 27°
☀️ WednesdaySeptember 2nd Avg 28° Low 23° at 06:00 High 35° at 15:00 Feels 33° Wind ~21 km/h
Cloudy Clear
00:00 28°
02:00 28°
04:00 25°
06:00 23°
08:00 24°
10:00 28°
12:00 32°
14:00 35°
16:00 35°
18:00 31°
20:00 28°
22:00 25°
☁️ ThursdaySeptember 3rd Avg 23° Low 18° at 06:00 High 29° at 15:00 0.3 mm rain Feels 27° Wind ~17 km/h
Partly Cloudy Cloudy Rain
00:00 22°
02:00 21°
04:00 19°
06:00 18°
08:00 19°
10:00 22°
12:00 26°
14:00 28°
16:00 29°
18:00 26° 0.1mm
20:00 23°
22:00 22°
🌦️ FridaySeptember 4th Avg 24° Low 19° at 05:00 High 31° at 15:00 2.1 mm rain Feels 29° Wind ~13 km/h
Rain Cloudy Rain
00:00 21°
02:00 20° 0.2mm
04:00 19° 0.2mm
06:00 19° 0.2mm
08:00 19°
10:00 21°
12:00 26°
14:00 30°
16:00 31°
18:00 28° 0.1mm
20:00 25° 0.2mm
22:00 24° 0.2mm
⛅ SaturdaySeptember 5th Avg 26° Low 20° at 06:00 High 32° at 16:00 Wind ~11 km/h
Partly Cloudy Clear
00:00 23°
02:00 22°
04:00 21°
06:00 20°
08:00 22°
10:00 25°
12:00 29°
14:00 31°
16:00 32°
18:00 30°
20:00 28°
22:00 25°
🌦️ SundaySeptember 6th Avg 23° Low 20° at 07:00 High 26° at 13:00 8.7 mm rain Wind ~17 km/h
Clear Rain
00:00 24°
02:00 23°
04:00 23°
06:00 21° 0.3mm
08:00 21° 0.9mm
10:00 23° 0.9mm
12:00 25° 0.1mm
14:00 26° 0.6mm
16:00 24° 0.6mm
18:00 23° 0.4mm
20:00 22° 0.5mm
22:00 22° 0.5mm
🌧️ MondaySeptember 7th Avg 24° Low 19° at 23:00 High 30° at 15:00 13.8 mm rain Wind ~29 km/h
Rain Cloudy Rain Clear
00:00 21° 0.3mm
02:00 21° 3.2mm
04:00 22° 3.2mm
06:00 21° 0.2mm
08:00 22°
10:00 24°
12:00 28°
14:00 30° 0.1mm
16:00 29° 0.1mm
18:00 26° 0.9mm
20:00 23°
22:00 19°

Sun

☀️ Sunrise 06:22 · Sunset 19:44

13h 22m of daylight · America/Chicago

Air quality

PM2.5 14.4 µg/m³ - Fair

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

Source: Copernicus CAMS, updated hourly.

Nearby

Greater Ville · 1.1 km Penrose · 1.1 km College Hill · 1.6 km The Ville · 1.8 km Kingsway East · 2.1 km Mark Twain · 2.1 km

Tools for O'Fallon

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

Common questions about O'Fallon weather

Will it rain in O'Fallon today?

No rain is in the forecast for O'Fallon today.

What is the temperature in O'Fallon right now?

It is 22° in O'Fallon right now. Today runs between a low of 18° and a high of 28°.

What time is sunrise and sunset in O'Fallon?

The sun rises at 06:22 and sets at 19:44 local time in O'Fallon today, giving 13h 22m of daylight.

What is the air quality in O'Fallon?

PM2.5 in O'Fallon is currently 14.4 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 O'Fallon 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 O'Fallon 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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