S
M
T
W
T
F
S
26
85°
69°
27
87°
69°
28
90°
67°
29
90°
67°
30
88°
72°
31
87°
67°
1
86°
69°
2
87°
67°
3
86°
66°
4
87°
71°
5
86°
66°
6
86°
65°
7
85°
64°
8
85°
65°
9
86°
65°
10
84°
66°
11
84°
65°
12
85°
66°
13
84°
66°
14
84°
67°
15
86°
68°
16
85°
66°
17
84°
67°
18
83°
68°
19
84°
67°
20
86°
65°
21
83°
66°
22
87°
69°
23
85°
69°
24
Hist. Avg.
84°
65°
25
Hist. Avg.
83°
65°
26
Hist. Avg.
83°
65°
27
Hist. Avg.
83°
65°
28
Hist. Avg.
83°
65°
29
Hist. Avg.
82°
64°
30
Hist. Avg.
82°
64°
31
Hist. Avg.
82°
64°
1
Hist. Avg.
82°
64°
2
Hist. Avg.
82°
64°
3
Hist. Avg.
81°
64°
4
Hist. Avg.
81°
63°
5
Hist. Avg.
81°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Ostia
Ostia's August 2026 forecast shows daily high temperatures ranging from 83° to 90°, with overnight lows between 64° and 72°. The average high for August is 86° with an average low of 67°. 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 Ostia. See also: September | October | November.