S
M
T
W
T
F
S
26
66°
61°
27
70°
62°
28
73°
63°
29
72°
64°
30
72°
63°
31
68°
61°
1
66°
57°
2
69°
56°
3
64°
57°
4
65°
60°
5
65°
61°
6
68°
57°
7
64°
57°
8
64°
58°
9
65°
57°
10
67°
59°
11
64°
60°
12
66°
59°
13
69°
61°
14
68°
59°
15
69°
65°
16
74°
58°
17
73°
61°
18
72°
61°
19
Hist. Avg.
86°
54°
20
Hist. Avg.
86°
55°
21
Hist. Avg.
86°
55°
22
Hist. Avg.
86°
55°
23
Hist. Avg.
86°
55°
24
Hist. Avg.
86°
55°
25
Hist. Avg.
86°
55°
26
Hist. Avg.
86°
55°
27
Hist. Avg.
86°
56°
28
Hist. Avg.
87°
56°
29
Hist. Avg.
87°
56°
30
Hist. Avg.
87°
56°
31
Hist. Avg.
87°
56°
1
Hist. Avg.
87°
57°
2
Hist. Avg.
87°
57°
3
Hist. Avg.
87°
57°
4
Hist. Avg.
87°
57°
5
Hist. Avg.
87°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Itajaí
Itajaí's August 2026 forecast shows daily high temperatures ranging from 64° to 74°, with overnight lows between 56° and 65°. The average high for August is 68° with an average low of 60°. 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 Itajaí. See also: September | October | November.
