S
M
T
W
T
F
S
26
76°
58°
27
75°
55°
28
78°
52°
29
73°
52°
30
75°
51°
31
79°
56°
1
86°
58°
2
69°
51°
3
63°
47°
4
71°
47°
5
70°
54°
6
61°
48°
7
70°
43°
8
69°
53°
9
71°
52°
10
66°
51°
11
67°
49°
12
69°
46°
13
63°
46°
14
64°
45°
15
72°
47°
16
75°
52°
17
73°
51°
18
72°
50°
19
72°
51°
20
74°
51°
21
75°
52°
22
71°
47°
23
75°
52°
24
71°
53°
25
75°
52°
26
75°
53°
27
74°
52°
28
71°
52°
29
65°
51°
30
73°
52°
31
72°
52°
1
70°
51°
2
72°
51°
3
70°
50°
4
67°
50°
5
69°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Irma
Irma's August 2026 forecast shows daily high temperatures ranging from 63° to 75°, with overnight lows between 45° and 53°. The average high for August is 71° with an average low of 50°. 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 Irma. See also: September | October | November.