Markham weather records
Record high and low temperatures for Markham, 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 1988-07-08; its coldest fell to -34°C on 1980-12-25.
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 | 15°C2005-01-13
-21°C2004-01-15
|
11°C2008-01-08
-32°C1982-01-12
|
| February | 16°C2017-02-23
-17°C1980-02-29
|
8°C2000-02-27
-31°C2023-02-04
|
| March | 26°C1986-03-30
-14°C1980-03-01
|
15°C1998-03-31
-27°C2003-03-03
|
| April | 31°C1990-04-25
-4°C1982-04-06
|
19°C1990-04-27
-13°C2016-04-05
|
| May | 34°C2006-05-29
4°C2020-05-09
|
24°C2012-05-29
-3°C2020-05-09
|
| June | 36°C1988-06-14
9°C1992-06-21
|
24°C2025-06-24
1°C1980-06-12
|
| July | 37°C1988-07-08
17°C1997-07-08
|
25°C2011-07-21
7°C1992-07-22
|
| August | 36°C2006-08-01
14°C1982-08-28
|
26°C2006-08-01
4°C1982-08-29
|
| September | 34°C2013-09-10
8°C1993-09-29
|
23°C1983-09-06
-1°C1989-09-27
|
| October | 29°C2019-10-01
1°C1992-10-19
|
19°C2002-10-01
-6°C2013-10-29
|
| November | 22°C2022-11-05
-9°C2018-11-22
|
15°C2024-11-06
-20°C2019-11-13
|
| December | 18°C1982-12-03
-18°C1983-12-25
|
12°C1982-12-03
-34°C1980-12-25
|
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°C1982-12-03
-21°C2004-01-15
|
12°C1982-12-03
-34°C1980-12-25
|
| Spring (Mar–May) | 34°C2006-05-29
-14°C1980-03-01
|
24°C2012-05-29
-27°C2003-03-03
|
| Summer (Jun–Aug) | 37°C1988-07-08
9°C1992-06-21
|
26°C2006-08-01
1°C1980-06-12
|
| Autumn (Sep–Nov) | 34°C2013-09-10
-9°C2018-11-22
|
23°C1983-09-06
-20°C2019-11-13
|
All-time records
The most extreme value Markham 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.