S
M
T
W
T
F
S
26
91°
68°
27
92°
68°
28
92°
67°
29
91°
67°
30
89°
66°
31
87°
66°
1
91°
68°
2
92°
68°
3
92°
67°
4
91°
68°
5
90°
67°
6
90°
68°
7
91°
64°
8
91°
56°
9
88°
60°
10
86°
59°
11
85°
56°
12
82°
54°
13
81°
56°
14
80°
62°
15
81°
62°
16
88°
59°
17
86°
55°
18
80°
54°
19
82°
55°
20
86°
55°
21
83°
61°
22
86°
62°
23
88°
62°
24
87°
61°
25
88°
60°
26
88°
55°
27
87°
54°
28
81°
50°
29
78°
51°
30
79°
50°
31
78°
51°
1
79°
50°
2
77°
49°
3
77°
52°
4
78°
50°
5
77°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Belfast
Belfast's August 2026 forecast shows daily high temperatures ranging from 77° to 92°, with overnight lows between 49° and 68°. The average high for August is 85° with an average low of 59°. 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 Belfast. See also: September | October | November.
