Ottawa, Ontario, Canada climate
Average temperatures, precipitation and all-time records for Ottawa, Ontario, Canada, with every day graded against ~45 years of local climate history (1981–2026). Its warmest month is July, averaging a high of 25°C, and its coldest is January, with an average low of -18°C.
Ottawa is the capital city of Canada. It is located in the southeastern portion of the province of Ontario, at the confluence of the Ottawa River and the Rideau River. via Wikipedia
How today compares
Latest recorded day: 2026-07-21. Each reading placed on Ottawa, Ontario, Canada's own ±7-day seasonal distribution.
Ottawa average temperatures by month
Typical daily high and low, and average precipitation, for each month in Ottawa, Ontario, Canada, based on 1981–2026 records. The wettest month is January (3 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | -8°C | -18°C | 3 mm |
| February | -5°C | -16°C | 3 mm |
| March | 1°C | -9°C | 3 mm |
| April | 11°C | -1°C | 3 mm |
| May | 18°C | 6°C | 3 mm |
| June | 23°C | 12°C | 3 mm |
| July | 25°C | 15°C | 3 mm |
| August | 25°C | 14°C | 3 mm |
| September | 21°C | 10°C | 3 mm |
| October | 13°C | 3°C | 3 mm |
| November | 5°C | -3°C | 3 mm |
| December | -4°C | -12°C | 3 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
Thinking of visiting Ottawa?
Trips live and die by the weather. See how Ottawa's comfort stacks up against where you live. Ottawa is pre-loaded, just add your city.
Record extremes
- Hottest day on record: 36°C on 2018-07-01
- Coldest day on record: -47°C on 1981-01-04
Percentiles compare each day to Ottawa, Ontario, Canada's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →