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Newmarket (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Newmarket.
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Climate overview of Newmarket
Temperatures in Newmarket, Ontario, Canada, vary greatly throughout the year. July is the hottest month at 27°C (81°F), while January is the coldest at -1°C (30°F).
The city receives around 913 mm (36 in) of rain/snowfall per year. It experiences warm summers and very cold winters. June is the wettest month and February the driest. The most sunshine falls in July, with an average of 9.3 hours of daily sunshine.
Newmarket Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Newmarket - and find the best time to visit.
Monthly Temperature in Newmarket
The climate in Newmarket is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 27°C (81°F) in July to a very cold -1°C (30°F) in January.
Nighttime temperatures range from 15°C (59°F) in July to -11°C (12°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Newmarket
Generally, Newmarket receives mid-range precipitation levels, with 913 mm (36 in) annually. The wettest period in Newmarket occurs in June, which receives around 95 mm (3.7 in) of precipitation. During the driest month, February, Newmarket experiences moderate snowfall, totaling 58 mm (2.3 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Newmarket 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 Newmarket
In Newmarket, summer days are longer and more sunny, with daily sunshine hours peaking at 9.3 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.6 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Toronto, Canada (45 KM, 28 Miles).
Daily hours of sunshine
Data from: Toronto, Canada (45 KM, 28 Miles).
Daily percentage of sunshine
Data from: Toronto, Canada (45 KM, 28 Miles).
Humidity in Newmarket 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
Data from: Toronto, Canada (45 KM, 28 Miles).
Best Time to Visit Newmarket
Conditions in Newmarket are generally most comfortable in May, June, July, August and September. They are typically least comfortable in January, February, March, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very cold
Feb
cold
Mar
cold
Apr
mixed
May
excellent
Jun
excellent
Jul
excellent
Aug
excellent
Sep
excellent
Oct
good
Nov
cold
Dec
cold
- Best overall: May, 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 -11°C (12°F).
Frequently asked questions about the climate in Newmarket
What is the best time to visit Newmarket?
May, June, July, August and September typically offer the most optimal weather in Newmarket. In contrast, January, February, March, November and December tend to have less optimal conditions. Newmarket has warm summers and very cold winters.
What temperatures can I expect in Newmarket?
Daytime highs range from -1°C (30°F) in January to 27°C (81°F) in July. Nighttime lows range from -11°C (12°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Newmarket get?
Annual rainfall is around 913 mm (36 in). June is the wettest month with 95 mm (3.7 in), while February is the driest with 58 mm (2.3 in).
How sunny is Newmarket?
Newmarket 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, Newmarket enjoys abundant sunshine.
Newmarket 3-Day Forecast
Newmarket on the map
Newmarket is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
Toronto
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