Newmarket (ON) Weather & Climate: Best Time to Visit

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

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

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

Daily hours of sunshine

Daily percentage of sunshine

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