Ottawa weather gives every visit a different feel, from the warmth of a summer patio to the crunch of fresh snow underfoot.
Located in Ontario, Canada’s capital has a continental climate with four distinct seasons: warm summers, colourful falls, snowy winters and springs that bring the city back into bloom. Average daily highs range from about -5°C (23°F) in January to 26°C (79°F) in July, with colder nights in winter and plenty of warmth for outdoor exploring in summer.
Precipitation is part of the experience throughout the year: rain keeps parks and gardens green, while snow in Ottawa sets the scene for winter adventures. Whether these seasonal changes are a familiar pleasure or something entirely new, the climate in Ottawa offers a fresh reason to get outside and enjoy nature.
Spring in Ottawa: March to May
April showers bring May flowers, and Ottawa puts on quite a show, with over a million tulips blooming across the capital during the Canadian Tulip Festival. Spring is a season of change: March can still feel wintry, while average daily highs rise to 11°C (52°F) in April and 19°C (66°F) in May. Rain helps bring gardens back to life, and warmer days welcome cyclists to the recreational pathways. Bring layers and waterproof footwear for a visit that might include both cool mornings and sunny afternoons.
Summer in Ottawa: June to August
Ottawa was made for summer! From June to August, average daily highs of 24°C to 26°C (75°F to 79°F) and long, sun-filled days invite outdoor adventures, open-air festivals and craft beers on a patio. Ottawa summer weather can also be humid, with hotter days and occasional rain making a museum visit or a leisurely café stop a welcome change of pace. Pack light clothing, sun protection and a rain jacket to make the most of the season.
Fall in Ottawa: September to November
Fall in Ottawa brings crisp air and leaves that turn brilliant shades of red, orange and gold — a beautiful backdrop for hikes and visits to local farmers’ markets.
Average daily highs cool from 20°C (68°F) in September to 13°C (55°F) in October and 5°C (41°F) in November. Weather in Ottawa in October is well suited to exploring in layers, while November calls for a warmer coat as nights dip below freezing.
When does fall start in Canada?
Meteorological fall runs from September 1 to November 30; astronomical fall begins at the September equinox, usually September 22 or 23.
Winter in Ottawa: December to February
Winter in Ottawa turns snowy days into an invitation to try something new, whether you’re lacing up skates or warming your hands around a hot chocolate.
Ottawa winter weather is cold: January is the coldest month, with average daily highs around -5°C (23°F) and lows around -15°C (5°F). Snowfall in Ottawa creates opportunities for winter outings, and the Rideau Canal Skateway, the world’s largest outdoor skating rink, a must-do when open; the Rideau Canal season depends on weather and ice conditions. Pack an insulated coat, boots, a hat and mittens, and check the forecast and wind chill before heading out.
Ottawa temperature by month: average daily highs and lows
Use this monthly guide to compare Ottawa weather in Celsius and Fahrenheit as you plan your visit. These averages describe typical conditions, not the forecast for your travel dates.
| Month | high (°C) | low (°C) | high (°F) | low (°F) |
|---|---|---|---|---|
| January | -5° | -15° | 23° | 5° |
| February | -4° | -13° | 25° | 9° |
| March | 2° | -6° | 36° | 21° |
| April | 11° | 0° | 52° | 32° |
| May | 19° | 7° | 66° | 45° |
| June | 24° | 12° | 75° | 54° |
| July | 26° | 15° | 79° | 59° |
| August | 25° | 14° | 77° | 57° |
| September | 20° | 9° | 68° | 48° |
| October | 13° | 3° | 55° | 37° |
| November | 5° | -2° | 41° | 28° |
| December | -3° | -11° | -27° | 12° |
Check local Ottawa weather before your visit
For today’s temperature, tomorrow’s forecast or an Ottawa snowfall warning, check Environment and Climate Change Canada’s forecasts and weather alerts. Conditions can change quickly, so review any alerts before travelling and check outdoor attraction conditions before you go. Choose your season, pack for the forecast and discover Ottawa at your own pace.
