Markham, Ontario, Canada climate
Average temperatures, precipitation and all-time records for Markham, Ontario, Canada, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is August, averaging a high of 24°C, and its coldest is February, with an average low of -7°C.
Markham is a city in York Region, Ontario, Canada. It is approximately 30 km (19 mi) northeast of Downtown Toronto. In the 2021 Census, Markham had a population of 338,503, which ranked it the largest in York Region, fourth largest in the Greater Toronto Area (GTA), and 16th largest in Canada. via Wikipedia
How today compares
Latest recorded day: 2026-07-24. Each reading placed on Markham, Ontario, Canada's own ±7-day seasonal distribution.
Markham average temperatures by month
Typical daily high and low, and average precipitation, for each month in Markham, Ontario, Canada, based on 1980–2026 records. The wettest month is January (3 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | -1°C | -7°C | 3 mm |
| February | -1°C | -7°C | 3 mm |
| March | 3°C | -3°C | 3 mm |
| April | 8°C | 3°C | 3 mm |
| May | 13°C | 8°C | 3 mm |
| June | 19°C | 14°C | 3 mm |
| July | 24°C | 19°C | 3 mm |
| August | 24°C | 19°C | 3 mm |
| September | 21°C | 16°C | 3 mm |
| October | 14°C | 9°C | 3 mm |
| November | 8°C | 3°C | 3 mm |
| December | 2°C | -2°C | 3 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 33°C on 2026-07-14
- Coldest day on record: -26°C on 1981-01-04
Percentiles compare each day to Markham, Ontario, Canada's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →