S
M
T
W
T
F
S
26
78°
70°
27
79°
70°
28
78°
72°
29
79°
70°
30
79°
72°
31
77°
73°
1
80°
72°
2
77°
72°
3
80°
73°
4
79°
73°
5
80°
72°
6
81°
71°
7
80°
72°
8
78°
71°
9
79°
73°
10
80°
74°
11
80°
73°
12
79°
72°
13
78°
72°
14
78°
71°
15
79°
72°
16
78°
73°
17
79°
73°
18
79°
69°
19
78°
70°
20
77°
70°
21
78°
69°
22
77°
68°
23
76°
69°
24
76°
70°
25
77°
72°
26
79°
72°
27
79°
71°
28
78°
72°
29
77°
71°
30
78°
71°
31
79°
72°
1
78°
73°
2
79°
74°
3
80°
73°
4
81°
70°
5
79°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Argostoli
Argostoli's August 2026 forecast shows daily high temperatures ranging from 76° to 81°, with overnight lows between 66° and 74°. The average high for August is 79° 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 Argostoli. See also: September | October | November.