S
M
T
W
T
F
S
26
86°
71°
27
87°
72°
28
90°
73°
29
90°
73°
30
91°
72°
31
91°
73°
1
90°
69°
2
87°
71°
3
88°
70°
4
86°
68°
5
85°
67°
6
84°
69°
7
85°
69°
8
87°
72°
9
Hist. Avg.
89°
70°
10
Hist. Avg.
89°
70°
11
Hist. Avg.
89°
70°
12
Hist. Avg.
89°
70°
13
Hist. Avg.
89°
70°
14
Hist. Avg.
89°
70°
15
Hist. Avg.
88°
70°
16
Hist. Avg.
88°
70°
17
Hist. Avg.
88°
70°
18
Hist. Avg.
88°
70°
19
Hist. Avg.
88°
69°
20
Hist. Avg.
88°
69°
21
Hist. Avg.
88°
69°
22
Hist. Avg.
88°
69°
23
Hist. Avg.
88°
69°
24
Hist. Avg.
88°
69°
25
Hist. Avg.
88°
69°
26
Hist. Avg.
87°
68°
27
Hist. Avg.
87°
68°
28
Hist. Avg.
87°
68°
29
Hist. Avg.
87°
68°
30
Hist. Avg.
87°
68°
31
Hist. Avg.
87°
68°
1
Hist. Avg.
86°
68°
2
Hist. Avg.
86°
67°
3
Hist. Avg.
86°
67°
4
Hist. Avg.
86°
67°
5
Hist. Avg.
86°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Belfast
Belfast's August 2026 forecast shows daily high temperatures ranging from 84° to 91°, with overnight lows between 67° and 73°. The average high for August is 88° with an average low of 71°. 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.
