Nepean, Ontario, Canada weather records
Record high and low temperatures for Nepean, Ontario, Canada, by month, by season, and all-time, with the dates they occurred, across 1981–2026 of daily climate history. Its hottest day on record reached 36°C on 2018-07-01; its coldest fell to -47°C on 1981-01-04.
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 | 11°C2008-01-09
-30°C1981-01-03
|
5°C2007-01-05
-47°C1981-01-04
|
| February | 18°C2024-02-28
-25°C1993-02-06
|
3°C1981-02-20
-41°C2023-02-04
|
| March | 25°C2012-03-21
-20°C2007-03-06
|
10°C2012-03-21
-33°C1984-03-12
|
| April | 27°C2023-04-13
-9°C1982-04-06
|
14°C1990-04-27
-15°C1982-04-07
|
| May | 31°C1987-05-29
2°C2017-05-08
|
19°C2006-05-30
-4°C2020-05-12
|
| June | 35°C1989-06-23
11°C1993-06-01
|
21°C2021-06-28
1°C1986-06-03
|
| July | 36°C2018-07-01
15°C1992-07-31
|
23°C1999-07-05
6°C1982-07-03
|
| August | 35°C2025-08-12
12°C1985-08-30
|
22°C1988-08-14
3°C1982-08-29
|
| September | 33°C2002-09-09
6°C1991-09-30
|
20°C2010-09-02
-2°C1991-09-30
|
| October | 30°C2025-10-05
1°C1997-10-27
|
17°C2023-10-05
-7°C1997-10-23
|
| November | 21°C2022-11-05
-13°C1995-11-29
|
13°C2022-11-05
-21°C1995-11-29
|
| December | 17°C2015-12-24
-30°C1993-12-27
|
4°C2015-12-11
-45°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) | 18°C2024-02-28
-30°C1981-01-03
|
5°C2007-01-05
-47°C1981-01-04
|
| Spring (Mar–May) | 31°C1987-05-29
-20°C2007-03-06
|
19°C2006-05-30
-33°C1984-03-12
|
| Summer (Jun–Aug) | 36°C2018-07-01
11°C1993-06-01
|
23°C1999-07-05
1°C1986-06-03
|
| Autumn (Sep–Nov) | 33°C2002-09-09
-13°C1995-11-29
|
20°C2010-09-02
-21°C1995-11-29
|
All-time records
The most extreme value Nepean has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.