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 33°C on 2026-07-14; its coldest fell to -26°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 | 12°C2005-01-13
-17°C1981-01-04
|
9°C2008-01-08
-26°C1981-01-04
|
| February | 11°C2023-02-15
-16°C1996-02-03
|
5°C2017-02-23
-23°C2016-02-13
|
| March | 16°C1998-03-31
-14°C1984-03-12
|
10°C1998-03-31
-24°C2003-03-03
|
| April | 20°C2026-04-14
-3°C1982-04-06
|
12°C2017-04-16
-11°C1982-04-07
|
| May | 27°C2026-05-18
5°C2004-05-03
|
21°C2012-05-29
-2°C2026-05-03
|
| June | 31°C2026-06-30
10°C1992-06-21
|
23°C2012-06-29
6°C1980-06-10
|
| July | 33°C2026-07-14
17°C1992-07-02
|
26°C2012-07-17
12°C2001-07-02
|
| August | 31°C2006-08-01
16°C1986-08-28
|
26°C2006-08-01
10°C1986-08-28
|
| September | 29°C1983-09-10
10°C1993-09-30
|
24°C1983-09-06
4°C1993-09-30
|
| October | 25°C2007-10-08
4°C2008-10-29
|
20°C2002-10-01
0°C1988-10-31
|
| November | 18°C2024-11-05
-6°C2018-11-22
|
15°C2024-11-06
-11°C2019-11-13
|
| December | 15°C1998-12-07
-14°C1989-12-22
|
10°C1982-12-03
-24°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) | 15°C1998-12-07
-17°C1981-01-04
|
10°C1982-12-03
-26°C1981-01-04
|
| Spring (Mar–May) | 27°C2026-05-18
-14°C1984-03-12
|
21°C2012-05-29
-24°C2003-03-03
|
| Summer (Jun–Aug) | 33°C2026-07-14
10°C1992-06-21
|
26°C2012-07-17
6°C1980-06-10
|
| Autumn (Sep–Nov) | 29°C1983-09-10
-6°C2018-11-22
|
24°C1983-09-06
-11°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.