S
M
T
W
T
F
S
26
77°
64°
27
77°
65°
28
79°
66°
29
82°
66°
30
78°
65°
31
78°
66°
1
81°
65°
2
80°
66°
3
78°
66°
4
82°
65°
5
76°
64°
6
79°
65°
7
81°
64°
8
76°
61°
9
75°
60°
10
75°
62°
11
76°
64°
12
76°
64°
13
79°
65°
14
81°
65°
15
82°
64°
16
75°
60°
17
75°
54°
18
76°
55°
19
79°
64°
20
78°
61°
21
81°
63°
22
80°
59°
23
77°
56°
24
74°
55°
25
75°
59°
26
76°
55°
27
74°
54°
28
76°
56°
29
79°
59°
30
81°
59°
31
81°
61°
1
80°
62°
2
81°
58°
3
80°
51°
4
72°
50°
5
72°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Niagara
Niagara's August 2026 forecast shows daily high temperatures ranging from 72° to 82°, with overnight lows between 50° and 66°. The average high for August is 78° 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 Niagara. See also: September | October | November.
