Ottawa weather records
Record high and low temperatures for Ottawa, by month, by season, and all-time, with the dates they occurred, across 1980–2026 of daily climate history. Its hottest day on record reached 37°C on 2006-08-01; its coldest fell to -36°C on 1981-01-03.
Records by month
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have ever been in each calendar month, so each column shows its record high and its record low. Tap a month for its full averages and typical range.
| Month | Daytime high | Overnight low |
|---|---|---|
| January | 13°C1996-01-19
-25°C2004-01-15
|
6°C2007-01-05
-36°C1981-01-03
|
| February | 16°C2024-02-27
-23°C1995-02-06
|
6°C1981-02-20
-35°C2023-02-04
|
| March | 26°C2012-03-21
-15°C1989-03-07
|
10°C2012-03-22
-30°C1980-03-02
|
| April | 32°C1990-04-27
-6°C1982-04-06
|
17°C1990-04-27
-15°C1982-04-07
|
| May | 35°C2020-05-27
4°C2017-05-08
|
20°C2021-05-26
-3°C2020-05-12
|
| June | 35°C2025-06-23
9°C1980-06-10
|
24°C2025-06-24
0°C1986-06-03
|
| July | 37°C1988-07-08
17°C2021-07-08
|
25°C2001-07-24
6°C1982-07-03
|
| August | 37°C2006-08-01
13°C1986-08-28
|
25°C2001-08-07
4°C1986-08-29
|
| September | 34°C2002-09-09
6°C1992-09-30
|
23°C1983-09-06
-2°C1980-09-29
|
| October | 31°C2023-10-04
1°C2008-10-29
|
18°C2014-10-15
-9°C2020-10-31
|
| November | 23°C2022-11-05
-10°C1995-11-29
|
15°C2022-11-06
-21°C2013-11-30
|
| December | 16°C2015-12-24
-24°C1993-12-27
|
7°C2015-12-11
-33°C1993-12-27
|
Records by season
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have reached in each meteorological season (Northern Hemisphere, each a three-month span).
| Season | Daytime high | Overnight low |
|---|---|---|
| Winter (Dec–Feb) | 16°C2015-12-24
-25°C2004-01-15
|
7°C2015-12-11
-36°C1981-01-03
|
| Spring (Mar–May) | 35°C2020-05-27
-15°C1989-03-07
|
20°C2021-05-26
-30°C1980-03-02
|
| Summer (Jun–Aug) | 37°C2006-08-01
9°C1980-06-10
|
25°C2001-07-24
0°C1986-06-03
|
| Autumn (Sep–Nov) | 34°C2002-09-09
-10°C1995-11-29
|
23°C1983-09-06
-21°C2013-11-30
|
All-time records
The most extreme value Ottawa has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Gust
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.