Markham (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Markham.
Climate overview of Markham
Temperatures in Markham, Ontario, Canada, vary greatly throughout the year. July is the hottest month at 26°C (79°F), while January is the coldest at 0°C (32°F).
With around 953 mm (38 in) of annual rain/snowfall, the city has moderate precipitation levels. April is the wettest month and February the driest. It also has warm summers and very cold winters. July is the sunniest month, averaging 9.3 hours of sunshine per day.
Markham Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Markham - and find the best time to visit.
Monthly Temperature in Markham
The climate in Markham is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 26°C (79°F) in July to a very cold 0°C (32°F) in the coolest month, January.
Nights vary from 17°C (63°F) in July to around -9°C (16°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Markham
Generally, Markham receives mid-range precipitation levels, with 953 mm (38 in) annually. Precipitation levels in Markham remain relatively steady throughout the year. April has the most rain, with 90 mm (3.5 in) over 10 days. In the driest month February, this drops slightly to 64 mm (2.5 in), making the city's climate fairly predictable. For more details, please visit our Markham Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Markham
For those who appreciate different seasons, Markham serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.3 hours of sunshine daily, and embrace the darker days in December, offering only 2.6 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Markham by Month
The city experiences its highest humidity in September, reaching 87%. In April, the humidity drops to its lowest level at 76%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Markham
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -9°C (16°F).
Frequently asked questions about the climate in Markham
What is the best time to visit Markham?
June, July, August and September typically offer the most optimal weather in Markham. In contrast, January, February, March, November and December tend to have less optimal conditions. Markham has warm summers and very cold winters.
What temperatures can I expect in Markham?
Daytime highs range from 0°C (32°F) in January to 26°C (79°F) in July. Nighttime lows range from -9°C (16°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Markham get?
Annual rainfall is around 953 mm (38 in). April is the wettest month with 90 mm (3.5 in), while February is the driest with 64 mm (2.5 in).
How sunny is Markham?
Markham receives around 2,070 hours of sunshine per year. July is the sunniest month with 280 hours, while December is the cloudiest with just 78 hours. Overall, Markham enjoys abundant sunshine.
Markham 3-Day Forecast
Markham on the map
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