S
M
T
W
T
F
S
26
88°
60°
27
82°
63°
28
80°
55°
29
87°
49°
30
89°
61°
31
76°
63°
1
78°
58°
2
79°
50°
3
84°
46°
4
76°
58°
5
77°
55°
6
83°
49°
7
87°
62°
8
81°
55°
9
79°
53°
10
83°
56°
11
84°
56°
12
84°
55°
13
84°
54°
14
83°
51°
15
84°
48°
16
78°
54°
17
82°
50°
18
81°
48°
19
78°
45°
20
79°
44°
21
74°
56°
22
76°
50°
23
68°
47°
24
77°
41°
25
81°
47°
26
73°
57°
27
76°
48°
28
75°
54°
29
77°
63°
30
78°
65°
31
82°
58°
1
83°
55°
2
78°
60°
3
76°
56°
4
77°
58°
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 83°, with overnight lows between 48° and 65°. The average high for August is 77° with an average low of 57°. 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.
