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Hamilton, Ontario

72°F
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Hamilton, 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
83°
59°
27
87°
61°
28
83°
61°
29
82°
59°
30
87°
56°
31
89°
53°
1
81°
66°
2
71°
64°
3
82°
57°
4
84°
54°
5
84°
55°
6
86°
62°
7
81°
68°
8
87°
66°
9
84°
60°
10
85°
64°
11
Mostly cloudy and less humid
80°
62°
12
Humid; a stray p.m. t-storm
81°
62°
13
Partly sunny, a stray t-storm
82°
62°
14
Mostly sunny and pleasant
77°
58°
15
Partly sunny and nice
73°
62°
16
Humid; a little p.m. rain
75°
63°
17
Some sun with a few showers
75°
59°
18
Partly sunny
77°
61°
19
A few afternoon showers
76°
62°
20
A few morning showers
77°
61°
21
Clouds and sun; less humid
75°
63°
22
Mostly cloudy
74°
62°
23
Some brightening
76°
61°
24
Rather cloudy
76°
59°
25
Mostly sunny
75°
62°
26
Sunshine
80°
64°
27
A shower and thunderstorm
78°
63°
28
Mostly sunny and less humid
78°
60°
29
Increasing cloudiness
72°
57°
30
Cloudy
71°
56°
31
Clouds and sunshine
71°
56°
1
Mostly cloudy
72°
60°
2
Cloudy with a shower in spots
74°
62°
3
Humid with rain
75°
62°
4
Cloudy and humid
76°
61°
5
A little afternoon rain
77°
63°

Temperature Graph

°F
90° 82° 74° 66° 58° Aug
Today 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

August Weather in Hamilton

Hamilton's August 2026 forecast shows daily high temperatures ranging from 71° to 82°, with overnight lows between 56° and 64°. The average high for August is 76° with an average low of 61°. 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 Hamilton. See also: September | October | November.

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Weather Near Hamilton:

  • Brampton, Ontario
  • Mississauga Valley, Ontario
  • Toronto, Ontario
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