S
M
T
W
T
F
S
26
73°
58°
27
75°
57°
28
78°
56°
29
76°
54°
30
74°
52°
31
77°
54°
1
76°
53°
2
73°
51°
3
72°
53°
4
73°
52°
5
76°
53°
6
76°
53°
7
77°
54°
8
78°
57°
9
79°
53°
10
75°
56°
11
79°
60°
12
80°
60°
13
79°
59°
14
78°
52°
15
77°
51°
16
71°
55°
17
72°
54°
18
69°
51°
19
69°
49°
20
70°
57°
21
72°
59°
22
77°
57°
23
79°
58°
24
78°
50°
25
77°
49°
26
70°
49°
27
69°
53°
28
68°
54°
29
70°
57°
30
75°
57°
31
74°
56°
1
74°
52°
2
74°
49°
3
73°
49°
4
70°
53°
5
74°
53°
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 68° to 80°, with overnight lows between 49° and 60°. The average high for August is 74° with an average low of 54°. 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.