17°C
Clear sky
Ottawa Weather
↑ 21°C
↓ 12°C
- Feels like16°C
- Humidity83%
- Wind9 km/h WSW
- Precip. chance0%
Updated at 7:05 am
Today's Forecast in Ottawa
7 am
16°C
8 am
17°C
9 am
18°C
10 am
19°C
11 am
19°C
12 pm
20°C
1 pm
20°C
2 pm
21°C
3 pm
21°C
4 pm
20°C
5 pm
19°C
6 pm
18°C
10-Day Ottawa Weather Forecast
Today
Overcast
↑ 21°C
↓ 12°C
Fri, Sep 11
Clear sky
↑ 20°C
↓ 8°C
Sat, Sep 12
Overcast
💧 6%
↑ 23°C
↓ 11°C
Sun, Sep 13
Thunderstorm
💧 35%
↑ 26°C
↓ 17°C
Mon, Sep 14
Clear sky
💧 4%
↑ 18°C
↓ 10°C
Tue, Sep 15
Rain
💧 51%
↑ 19°C
↓ 9°C
Wed, Sep 16
Heavy rain
💧 40%
↑ 22°C
↓ 16°C
Thu, Sep 17
Overcast
💧 23%
↑ 18°C
↓ 14°C
Fri, Sep 18
Light drizzle
💧 23%
↑ 18°C
↓ 11°C
Sat, Sep 19
Overcast
💧 14%
↑ 18°C
↓ 8°C
Ottawa Air Quality
1.6
/ 10+ AQHI
Low Risk
Full Ottawa Air Quality Report →
Air quality is good. Ideal conditions for outdoor activities.
Ottawa Weather News
Special advisory: Ottawa winter weather parking ban lifted
Snowfall warning issued for Ottawa area
Blizzard blasts Ottawa into Thursday – Winter Storm Warning
How to avoid freezing pipes on extreme cold days in Ottawa
Severe Thunderstorm Watch issued for Ottawa, heavy rain, flooding possible
Special Weather Statement issued for Ottawa area – potential flooding
Severe Thunderstorm Watch issued for Ottawa – tornado risk
Ottawa just had its warmest and wackiest winter ever – What happens now?
Winter Storm Warning issued for Ottawa
Special Ottawa Advisory: Daytime winter weather parking ban in effect on Monday, December 4
Environment Canada issues Freezing Drizzle Warning for Ottawa
Severe Thunderstorm Watch issued for Greater Ottawa area – nickel-sized hail possible
Winter weather advisory issued for Ottawa area (January 29/2023)
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).