Ottawa, Canada Weather
Ottawa hourly forecast: next 24 hours
Today's high of 82°F (28°C) is right in line with the typical July high of 80°F (27°C).
Current conditions in detail
Ottawa weather tomorrow (Saturday, July 18)
Tomorrow in Ottawa looks patchy rain nearby, with a high of 81° and an overnight low of 57°. There is a 81% chance of rain - plan accordingly. Winds top out near 19 mph, and the UV index reaches 1 (low).
Ottawa 14-day forecast
About the weather in Ottawa
Located in Ontario, Canada, Ottawa experiences a humid continental climate with warm summers and cold, often snowy winters. Afternoon temperatures peak near 80°F (27°C) in July and dip to about 25°F (-4°C) in January, with around 43.8 inches (1112 mm) of precipitation falling across the year.
Ottawa weather: quick facts
- Hottest month: July - highs near 80°F (27°C)
- Coldest month: January - highs near 25°F (-4°C)
- Record high: 96°F (36°C) · Record low: -26°F (-32°C) (2015–2024)
- Wettest month: August (13 rainy days) · Sunniest: July (12.0 h sun/day)
- Climate type: humid continental - warm summers and cold, often snowy winters
- Snow: about 34 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 80°F (27°C) and overnight lows stay near 63°F (17°C). The coolest month is January, with typical highs of 25°F (-4°C) and lows around 8°F (-13°C). Based on 2015–2024 weather data, temperatures have reached as high as 96°F (36°C) and dropped as low as -26°F (-32°C).
Rain, sun and snow
August is usually the wettest month. It brings about 4.8 inches (121 mm) of rain over 13 days, while February is the driest. July brings the most sunshine, averaging 12.0 hours of sun a day. Snow falls on about 34 days in a typical year, mostly from October through April.
Season by season
Spring (March through May)
Spring in Ottawa runs cold, with daytime highs averaging 52°F (11°C) and nights around 33°F (0°C); expect showers on roughly 34 days across the season, plus around 8 snowy days.
Summer (June through August)
Summer in Ottawa is mild and warm, with daytime highs averaging 77°F (25°C) and nights around 60°F (16°C); expect showers on roughly 38 days across the season.
Fall (September through November)
Fall in Ottawa is mild, with daytime highs averaging 57°F (14°C) and nights around 43°F (6°C); expect showers on roughly 33 days across the season, plus around 4 snowy days.
Winter (December through February)
Winter in Ottawa brings deep cold, with daytime highs averaging 28°F (-2°C) and nights around 12°F (-11°C); expect showers on roughly 35 days across the season, plus around 23 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
Average temperatures in Ottawa by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 25° | 8° | 11 | 3.0 in | 4.9 h/day | 76% |
| February | 28° | 9° | 12 | 2.9 in | 6.1 h/day | 73% |
| March | 37° | 20° | 11 | 3.0 in | 7.5 h/day | 70% |
| April | 51° | 32° | 13 | 4.2 in | 8.2 h/day | 66% |
| May | 67° | 46° | 11 | 3.4 in | 10.4 h/day | 66% |
| June | 74° | 56° | 13 | 4.5 in | 10.8 h/day | 71% |
| July | 80° | 63° | 13 | 4.2 in | 12.0 h/day | 72% |
| August | 77° | 62° | 13 | 4.8 in | 10.8 h/day | 76% |
| September | 71° | 55° | 9 | 3.0 in | 9.5 h/day | 76% |
| October | 57° | 44° | 12 | 4.1 in | 6.4 h/day | 77% |
| November | 43° | 31° | 12 | 3.0 in | 5.0 h/day | 76% |
| December | 32° | 20° | 12 | 3.5 in | 3.8 h/day | 78% |