S
M
T
W
T
F
S
26
76°
60°
27
76°
54°
28
77°
59°
29
79°
61°
30
81°
63°
31
83°
62°
1
85°
52°
2
84°
53°
3
75°
54°
4
76°
54°
5
79°
53°
6
77°
57°
7
79°
54°
8
76°
59°
9
79°
61°
10
82°
60°
11
83°
61°
12
84°
59°
13
80°
60°
14
83°
54°
15
79°
54°
16
76°
56°
17
75°
59°
18
82°
59°
19
82°
55°
20
81°
56°
21
82°
58°
22
82°
58°
23
83°
54°
24
74°
52°
25
72°
49°
26
76°
56°
27
79°
57°
28
77°
54°
29
77°
52°
30
71°
48°
31
69°
47°
1
70°
52°
2
71°
54°
3
70°
53°
4
76°
54°
5
78°
52°
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 69° to 85°, with overnight lows between 47° and 63°. The average high for August is 78° with an average low of 56°. 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.
