London, Ontario, Canada weather records
Record high and low temperatures for London, 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 37°C on 1988-07-06; its coldest fell to -28°C on 1982-01-17.
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°C2008-01-08
-19°C1982-01-17
|
9°C2008-01-08
-28°C1982-01-17
|
| February | 16°C2000-02-26
-19°C2015-02-15
|
6°C2018-02-20
-26°C2015-02-16
|
| March | 27°C2012-03-22
-11°C1996-03-08
|
12°C1998-03-31
-23°C2015-03-06
|
| April | 28°C2023-04-15
-6°C1982-04-06
|
14°C2026-04-15
-13°C2003-04-06
|
| May | 33°C2006-05-29
4°C2020-05-08
|
20°C2018-05-31
-3°C1983-05-10
|
| June | 36°C1988-06-25
11°C2001-06-03
|
23°C2025-06-22
3°C2003-06-01
|
| July | 37°C1988-07-06
17°C1997-07-04
|
24°C2013-07-19
7°C2001-07-02
|
| August | 37°C2001-08-08
15°C1986-08-28
|
25°C2006-08-02
5°C1982-08-28
|
| September | 35°C2002-09-08
10°C1990-09-23
|
23°C2016-09-07
-1°C1993-09-30
|
| October | 31°C2007-10-08
3°C1993-10-31
|
20°C2007-10-08
-4°C1981-10-24
|
| November | 22°C2020-11-10
-6°C2014-11-18
|
15°C2024-11-05
-11°C2018-11-22
|
| December | 19°C1982-12-03
-14°C1983-12-24
|
13°C1982-12-03
-23°C2004-12-27
|
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) | 19°C1982-12-03
-19°C1982-01-17
|
13°C1982-12-03
-28°C1982-01-17
|
| Spring (Mar–May) | 33°C2006-05-29
-11°C1996-03-08
|
20°C2018-05-31
-23°C2015-03-06
|
| Summer (Jun–Aug) | 37°C1988-07-06
11°C2001-06-03
|
25°C2006-08-02
3°C2003-06-01
|
| Autumn (Sep–Nov) | 35°C2002-09-08
-6°C2014-11-18
|
23°C2016-09-07
-11°C2018-11-22
|
All-time records
The most extreme value London 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.