Monthly climate in Newmarket, Ontario, Canada

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Newmarket features a humid continental climate (Dfb). Temperatures typically range between -6 °C (22 °F) and 22 °C (72 °F) through the year, but rarely can drop to -29 °C (-21 °F) or can rise to as high as 35 °C (96 °F). The average annual precipitation amounts to about 975 mm (38.4 inches) and receives 137 rainy days on the 1 mm (0.04 inches) threshold annually. Newmarket enjoys an average of 2787 hours of sunshine throughout the year, and daylight varies from 8 hours 56 minutes to 15 hours 24 minutes per day.

Monthly average temperatures in Newmarket, Ontario, Canada §

The warmest months in Newmarket are June, July and August, with daily mean temperatures ranging from 19 to 22 °C (66 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -6 to -2 °C (22 - 28 °F) throughout the day. On average each year, Newmarket experiences 56 days above 25 °C (77.0 °F) and 136 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Newmarket, Ontario, Canada. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 12°C
(53°F)
16°C
(60°F)
21°C
(69°F)
25°C
(77°F)
32°C
(90°F)
34°C
(93°F)
35°C
(96°F)
33°C
(92°F)
33°C
(91°F)
30°C
(86°F)
23°C
(73°F)
16°C
(62°F)
Mean maximum 8°C
(46°F)
11°C
(52°F)
17°C
(63°F)
21°C
(69°F)
30°C
(87°F)
32°C
(91°F)
33°C
(92°F)
31°C
(89°F)
30°C
(86°F)
26°C
(80°F)
16°C
(62°F)
11°C
(52°F)
Average high -2°C
(29°F)
-0°C
(32°F)
5°C
(41°F)
11°C
(52°F)
19°C
(66°F)
24°C
(76°F)
27°C
(81°F)
26°C
(79°F)
22°C
(72°F)
15°C
(58°F)
6°C
(43°F)
1°C
(34°F)
Daily mean -6°C
(22°F)
-5°C
(23°F)
-0°C
(32°F)
6°C
(42°F)
13°C
(56°F)
19°C
(66°F)
22°C
(72°F)
21°C
(69°F)
16°C
(62°F)
10°C
(50°F)
2°C
(36°F)
-2°C
(28°F)
Average low -10°C
(14°F)
-10°C
(14°F)
-5°C
(23°F)
1°C
(34°F)
8°C
(46°F)
13°C
(56°F)
16°C
(62°F)
15°C
(60°F)
11°C
(52°F)
6°C
(43°F)
-2°C
(29°F)
-6°C
(22°F)
Mean minimum -23°C
(-10°F)
-22°C
(-7°F)
-17°C
(1°F)
-5°C
(22°F)
-0°C
(32°F)
7°C
(45°F)
11°C
(52°F)
9°C
(49°F)
4°C
(40°F)
-3°C
(28°F)
-14°C
(8°F)
-17°C
(1°F)
Minimum -29°C
(-21°F)
-28°C
(-17°F)
-24°C
(-10°F)
-8°C
(18°F)
-3°C
(27°F)
3°C
(38°F)
10°C
(50°F)
7°C
(44°F)
1°C
(35°F)
-4°C
(25°F)
-21°C
(-5°F)
-28°C
(-18°F)

Compare climate in Newmarket with other places

Compare temperature, precipitation, sunshine, UV index in Newmarket, Ontario, Canada with other places around the world.

Monthly average precipitation in Newmarket, Ontario, Canada §

Newmarket usually has the most precipitation in April, May and October, with an average of 13 rainy days and 100 mm (4.0 inches) of precipitation per month. The driest months in Newmarket are January, February and March. On average, 60 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Newmarket, Ontario, Canada. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 60 (2.4) 61 (2.4) 60 (2.4) 103 (4.1) 99 (3.9) 94 (3.7) 98 (3.9) 97 (3.8) 64 (2.5) 100 (3.9) 74 (2.9) 67 (2.6)
Average precipitation days (≥ 1 mm) 8 11 10 13 13 11 12 13 9 13 11 13

Monthly sunshine hours in Newmarket, Ontario, Canada §

The sunniest months in Newmarket are June, July and August, when the sun shines an average of 11 hours 5 minutes a day. Least sunny months in Newmarket: January, November and December receive an average of 4 hours 1 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Newmarket, Ontario, Canada. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 107 154 225 230 289 331 348 340 300 196 148 113
Mean daily daylight hours 9h 18m 10h 28m 11h 57m 13h 28m 14h 46m 15h 24m 15h 3m 13h 54m 12h 27m 10h 56m 9h 36m 8h 56m

Solar UV radiation in Newmarket, Ontario, Canada §

Newmarket experiences the highest level of ultraviolet (UV) radiation in May, June and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Newmarket UV Index data.

Average daily maximum UV levels by month for Newmarket, Ontario, Canada. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 2 4 5 8 9 10 9 9 7 5 3 2

Detailed Monthly Weather Insights for Newmarket, Ontario, Canada

Discover in-depth weather details for every month in Newmarket. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Newmarket's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.