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Newmarket, Ontario

56°F
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56°
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Newmarket, Ontario Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities

August

January February March April May June July August September October November December

2026

2025 2026 2027

10-Day

S
M
T
W
T
F
S
26
Brilliant sunshine
81°
59°
27
Mostly sunny
83°
56°
28
A shower and thunderstorm
83°
52°
29
Partly sunny and less humid
77°
53°
30
Times of clouds and sun
76°
52°
31
Sunny to partly cloudy
77°
54°
1
Times of clouds and sun
76°
55°
2
Episodes of sunshine
76°
54°
3
Partly sunny
77°
53°
4
Intervals of clouds and sun
77°
52°
5
Mostly sunny
80°
58°
6
Mostly sunny
76°
51°
7
Mostly sunny
77°
50°
8
Hist. Avg.
78°
61°
9
Hist. Avg.
78°
61°
10
Hist. Avg.
78°
61°
11
Hist. Avg.
78°
61°
12
Hist. Avg.
78°
61°
13
Hist. Avg.
77°
60°
14
Hist. Avg.
77°
60°
15
Hist. Avg.
77°
60°
16
Hist. Avg.
77°
60°
17
Hist. Avg.
77°
60°
18
Hist. Avg.
76°
59°
19
Hist. Avg.
76°
59°
20
Hist. Avg.
76°
59°
21
Hist. Avg.
76°
59°
22
Hist. Avg.
76°
59°
23
Hist. Avg.
75°
58°
24
Hist. Avg.
75°
58°
25
Hist. Avg.
75°
58°
26
Hist. Avg.
75°
58°
27
Hist. Avg.
74°
57°
28
Hist. Avg.
74°
57°
29
Hist. Avg.
74°
57°
30
Hist. Avg.
74°
56°
31
Hist. Avg.
73°
56°
1
Hist. Avg.
73°
56°
2
Hist. Avg.
73°
56°
3
Hist. Avg.
72°
55°
4
Hist. Avg.
72°
55°
5
Hist. Avg.
72°
55°

Temperature Graph

°F
80° 72° 64° 56° 48° Aug
1 2 3 4 5 6 7 *8 *9 *10 *11 *12 *13 *14 *15 *16 *17 *18 *19 *20 *21 *22 *23 *24 *25 *26 *27 *28 *29 *30 *31
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable

August Weather in Newmarket

Newmarket's August 2026 forecast shows daily high temperatures ranging from 76° to 83°, with overnight lows between 50° and 59°. The average high for August is 78° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Newmarket. See also: September | October | November.

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World North America Canada Ontario Newmarket

Weather Near Newmarket:

  • Brampton, Ontario
  • Mississauga Valley, Ontario
  • Toronto, Ontario
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More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
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