Cities / United States / Illinois

24°

☁️ Ottawa weather

Overcast. .

Feels like 26° Wind 9 km/h SW Humidity 80% Pressure 1014 hPa UV 0 Air Good ☀ 06:10 - 19:45
⚠ Severe Thunderstorm Watch · Severe

Severe Thunderstorm Watch issued August 21 at 8:35PM CDT until August 21 at 10:00PM CDT by NWS Chicago IL

Right now it is 24° in Ottawa with overcast skies and today's high is 27° with an overnight low of 15°. The sun rises at 06:10 and sets at 19:45, giving 13h 35m of daylight. Over the coming week highs range from 22° to 28°.

Ottawa is in Illinois, United States, sitting 147 m above sea level, with a population of about 18,000. Local time is America/Chicago (UTC−5), and every time on this page is shown in it.

Next 24 hours - temperature

17° 22° 27° 27° 18° 20:00 · 23.8° · 0 mm 21:00 · 23.3° · 0 mm 22:00 · 21.5° · 0 mm 23:00 · 20.9° · 0 mm 00:00 · 20.2° · 0 mm 01:00 · 19.6° · 0 mm 02:00 · 19° · 0 mm 03:00 · 19° · 0 mm 04:00 · 18.8° · 0 mm 05:00 · 18.2° · 0 mm 06:00 · 17.9° · 0 mm 07:00 · 18.1° · 0 mm 08:00 · 19.7° · 0 mm 09:00 · 21.5° · 0 mm 10:00 · 23° · 0 mm 11:00 · 24.2° · 0 mm 12:00 · 25.2° · 0 mm 13:00 · 25.9° · 0 mm 14:00 · 26.4° · 0 mm 15:00 · 26.5° · 0 mm 16:00 · 25.8° · 0 mm 17:00 · 24.8° · 0 mm 18:00 · 23.7° · 0 mm 19:00 · 22.1° · 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 ☁️ 23.8° 26° - Overcast
21:00 ☁️ 23.3° 25.1° - Overcast
22:00 ⛅ 21.5° 23.1° - Partly cloudy
23:00 ☁️ 20.9° 23.3° - Overcast
00:00 ⛅ 20.2° 21.9° - Partly cloudy
01:00 ☀️ 19.6° 20.9° - Clear sky
02:00 ☀️ 19° 19.4° - Clear sky
03:00 ☀️ 19° 19.6° - Clear sky
04:00 ☀️ 18.8° 20° - Clear sky
05:00 🌤️ 18.2° 19.5° - Mostly clear
06:00 ☀️ 17.9° 17.5° - Clear sky
07:00 ☀️ 18.1° 17.9° - Clear sky

Next 16 days

Today⛅ 27°15° Sat 22☀️ 27°18° Sun 23☀️ 23°15° Mon 24☁️ 22°12° Tue 25☁️ 24°13° Wed 26🌦️ 28°15°0.7mm Thu 27☀️ 27°18°0.2mm Fri 28☁️ 26°17° Sat 29🌦️ 29°17°0.7mm Sun 30🌦️ 27°21°5mm Mon 31☀️ 31°20° Tue 1🌧️ 31°21°15mm Wed 2🌧️ 32°22°4.5mm Thu 3☁️ 30°23° Fri 4🌦️ 24°17°0.9mm Sat 5☁️ 22°15°
⛅ TodayAugust 21st Avg 21° Low 15° at 05:00 High 27° at 16:00 Feels 30° Wind ~14 km/h
Clear Clear Cloudy
00:00 16°
02:00 15°
04:00 15°
06:00 15°
08:00 18°
10:00 21°
12:00 24°
14:00 26°
16:00 27°
18:00 25°
20:00 24°
22:00 22°
☀️ SaturdayAugust 22nd Avg 22° Low 18° at 06:00 High 27° at 15:00 Feels 25° Wind ~18 km/h
Clear
00:00 20°
02:00 19°
04:00 19°
06:00 18°
08:00 20°
10:00 23°
12:00 25°
14:00 26°
16:00 26°
18:00 24°
20:00 21°
22:00 19°
☀️ SundayAugust 23rd Avg 19° Low 15° at 06:00 High 23° at 14:00 Wind ~18 km/h
Clear
00:00 18°
02:00 17°
04:00 16°
06:00 15°
08:00 17°
10:00 21°
12:00 23°
14:00 23°
16:00 23°
18:00 22°
20:00 18°
22:00 16°
☁️ MondayAugust 24th Avg 17° Low 12° at 06:00 High 22° at 16:00 Wind ~7 km/h
Cloudy
00:00 15°
02:00 14°
04:00 13°
06:00 12°
08:00 16°
10:00 19°
12:00 22°
14:00 22°
16:00 22°
18:00 20°
20:00 17°
22:00 16°
☁️ TuesdayAugust 25th Avg 18° Low 13° at 06:00 High 24° at 15:00 Wind ~12 km/h
Clear Cloudy Clear
00:00 14°
02:00 13°
04:00 13°
06:00 13°
08:00 16°
10:00 19°
12:00 22°
14:00 24°
16:00 24°
18:00 23°
20:00 18°
22:00 17°
🌦️ WednesdayAugust 26th Avg 21° Low 15° at 06:00 High 28° at 16:00 0.7 mm rain Wind ~20 km/h
Cloudy Cloudy Partly Cloudy Clear
00:00 17°
02:00 16°
04:00 16° 0.2mm
06:00 15° 0.1mm
08:00 18°
10:00 22° 0.1mm
12:00 25°
14:00 27°
16:00 28°
18:00 26°
20:00 24°
22:00 22°
☀️ ThursdayAugust 27th Avg 22° Low 18° at 06:00 High 27° at 15:00 0.2 mm rain Wind ~14 km/h
Clear
00:00 20° 0.1mm
02:00 19°
04:00 19°
06:00 18°
08:00 20°
10:00 23°
12:00 25°
14:00 26°
16:00 27°
18:00 24°
20:00 22°
22:00 19°
☁️ FridayAugust 28th Avg 21° Low 17° at 06:00 High 26° at 15:00 Feels 28° Wind ~11 km/h
Clear Cloudy Clear
00:00 18°
02:00 17°
04:00 17°
06:00 17°
08:00 19°
10:00 23°
12:00 25°
14:00 26°
16:00 26°
18:00 24°
20:00 21°
22:00 19°
🌦️ SaturdayAugust 29th Avg 23° Low 17° at 06:00 High 29° at 15:00 0.7 mm rain Wind ~21 km/h
Clear Partly Cloudy
00:00 18°
02:00 18°
04:00 18°
06:00 17°
08:00 19°
10:00 23°
12:00 26°
14:00 28°
16:00 29°
18:00 27°
20:00 26°
22:00 25°
🌦️ SundayAugust 30th Avg 25° Low 21° at 06:00 High 27° at 11:00 5 mm rain Feels 29° Wind ~32 km/h
Rain Cloudy Partly Cloudy Rain
00:00 24° 0.7mm
02:00 23° 0.7mm
04:00 22° 0.7mm
06:00 21° 0.4mm
08:00 23°
10:00 27°
12:00 27°
14:00 27°
16:00 26°
18:00 25°
20:00 25° 0.1mm
22:00 26° 0.1mm
☀️ MondayAugust 31st Avg 26° Low 20° at 06:00 High 31° at 15:00 Feels 34° Wind ~28 km/h
Clear
00:00 27°
02:00 26°
04:00 22°
06:00 20°
08:00 22°
10:00 26°
12:00 29°
14:00 30°
16:00 31°
18:00 28°
20:00 25°
22:00 23°
🌧️ TuesdaySeptember 1st Avg 26° Low 21° at 01:00 High 31° at 16:00 15 mm rain Feels 35° Wind ~22 km/h
Rain Clear
00:00 22°
02:00 21° 4.6mm
04:00 22° 4.6mm
06:00 22° 0.4mm
08:00 23°
10:00 26°
12:00 29°
14:00 30°
16:00 31°
18:00 29°
20:00 28°
22:00 26°
🌧️ WednesdaySeptember 2nd Avg 26° Low 22° at 09:00 High 32° at 16:00 4.5 mm rain Feels 35° Wind ~24 km/h
Rain Rain Partly Cloudy Partly Cloudy
00:00 25°
02:00 24° 1.1mm
04:00 24° 1.1mm
06:00 23°
08:00 22° 0.4mm
10:00 22° 0.4mm
12:00 27°
14:00 31°
16:00 32°
18:00 30°
20:00 27°
22:00 25°
☁️ ThursdaySeptember 3rd Avg 27° Low 23° at 23:00 High 30° at 13:00 Feels 34° Wind ~21 km/h
Partly Cloudy Cloudy
00:00 25°
02:00 26°
04:00 29°
06:00 26°
08:00 25°
10:00 28°
12:00 30°
14:00 30°
16:00 30°
18:00 27°
20:00 25°
22:00 24°
🌦️ FridaySeptember 4th Avg 21° Low 17° at 23:00 High 24° at 15:00 0.9 mm rain Wind ~27 km/h
Rain Cloudy
00:00 21°
02:00 20° 0.1mm
04:00 20° 0.1mm
06:00 21° 0.2mm
08:00 21°
10:00 21°
12:00 22°
14:00 23°
16:00 24°
18:00 22°
20:00 20°
22:00 18°
☁️ SaturdaySeptember 5th Avg 18° Low 15° at 06:00 High 22° at 15:00 Feels 20° Wind ~22 km/h
Cloudy Clear Partly Cloudy Cloudy
00:00 17°
02:00 17°
04:00 16°
06:00 15°
08:00 16°
10:00 18°
12:00 20°
14:00 21°
16:00 22°
18:00 20°
20:00 18°
22:00 18°

Sun

☀️ Sunrise 06:10 · Sunset 19:45

13h 35m of daylight · America/Chicago

Air quality

PM2.5 4.8 µg/m³ - Good

No reason to change your plans - open the windows.

Source: Copernicus CAMS, updated hourly.

Nearby

South Ottawa (historical) · 1.6 km Naplate · 3.3 km Hitt · 3.4 km Stoneyville · 4.6 km Woodland Addition · 5.2 km Dayton · 5.9 km

Tools for Ottawa

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

Common questions about Ottawa weather

Will it rain in Ottawa today?

No rain is in the forecast for Ottawa today.

What is the temperature in Ottawa right now?

It is 24° in Ottawa right now, though it feels closer to 26°. Today runs between a low of 15° and a high of 27°.

What time is sunrise and sunset in Ottawa?

The sun rises at 06:10 and sets at 19:45 local time in Ottawa today, giving 13h 35m of daylight.

What is the air quality in Ottawa?

PM2.5 in Ottawa is currently 4.8 µg/m³, which counts as Good on the European air-quality index. No reason to change your plans - open the windows.

How accurate is the Ottawa 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 Ottawa 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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