24°C
Clear sky

Ottawa Weather

↑ 24°C ↓ 13°C
  • Feels like22°C
  • Humidity37%
  • Wind11 km/h W
  • Precip. chance2%

Updated at 5:17 pm

Today's Forecast in Ottawa

5 pm 24°C
6 pm 24°C
7 pm 22°C 1%
8 pm 20°C 1%
9 pm 19°C 2%
10 pm 19°C 1%
11 pm 18°C
12 am 17°C
1 am 15°C
2 am 14°C
3 am 13°C
4 am 13°C
UV Index
1.9
Low — Max 5.7
Sunrise / Sunset
6:10 am
↓ 8:02 pm
Wind
11 km/h
W — Gusts 17 km/h
Feels Like
22°C
Similar to the actual temperature
Precipitation
2%
No precipitation expected
Visibility
54.5 km
Clear visibility
Humidity
37%
Comfortable humidity
Moon
🌓
First Quarter
Air Pressure
1008 hPa
Low pressure — unsettled weather

10-Day Ottawa Weather Forecast

Today Overcast 💧 2% ↑ 24°C ↓ 13°C
Fri, Aug 21 Overcast 💧 2% ↑ 24°C ↓ 12°C
Sat, Aug 22 Light drizzle 💧 23% ↑ 26°C ↓ 11°C
Sun, Aug 23 Thunderstorm 💧 83% ↑ 21°C ↓ 15°C
Mon, Aug 24 Light drizzle 💧 44% ↑ 17°C ↓ 12°C
Tue, Aug 25 Overcast 💧 16% ↑ 23°C ↓ 11°C
Wed, Aug 26 Overcast 💧 22% ↑ 24°C ↓ 12°C
Thu, Aug 27 Overcast 💧 27% ↑ 25°C ↓ 14°C
Fri, Aug 28 Overcast 💧 17% ↑ 24°C ↓ 14°C
Sat, Aug 29 Partly cloudy 💧 11% ↑ 27°C ↓ 15°C

Ottawa Air Quality

1.5
/ 10+ AQHI
Low Risk

Air quality is good. Ideal conditions for outdoor activities.

Full Ottawa Air Quality Report →

Ottawa Weather News

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About Ottawa Weather

Ottawa experiences a humid continental climate with four distinct seasons. Summers are warm and humid, winters are cold with significant snowfall, and spring and fall bring mild, changeable conditions. Staying informed about daily Ottawa weather helps you plan your commute, outdoor activities, and everything in between.

What Affects Ottawa Weather?

  • Lake effect: Proximity to the Great Lakes can produce intense localized snowfall and moisture in Ottawa and surrounding areas.
  • Jet stream patterns: Shifts in the polar jet stream bring Arctic air masses in winter and warm, humid air in summer.
  • Urban heat island: Dense urban development means Ottawa often records higher temperatures than surrounding rural areas, especially overnight.
  • Storm tracks: Low-pressure systems tracking up the St. Lawrence Valley and across the Great Lakes are responsible for most significant precipitation events.

Frequently Asked Questions — Ottawa Weather

How accurate is this Ottawa weather forecast?

This forecast uses Open-Meteo, a high-resolution open-source weather API powered by national meteorological models including ECMWF. Data is refreshed every 30 minutes.

What is the best time of year to visit Ottawa?

Late spring (May–June) and early fall (September–October) offer the most comfortable weather in Ottawa, with mild temperatures and lower humidity.

Does Ottawa get a lot of snow?

Ottawa receives an average of 115–130 cm of snowfall per year, mostly between December and March. Lake-effect events can bring heavy, localized snowfall in a short period.

What does the UV index mean?

The UV index measures the intensity of ultraviolet radiation from the sun. A UV index of 3–5 is moderate (wear sunscreen), 6–7 is high (limit midday sun exposure), 8–10 is very high (seek shade), and 11+ is extreme (avoid sun between 10am–4pm).