S
M
T
W
T
F
S
30
91°
68°
31
91°
68°
1
93°
68°
2
97°
70°
3
97°
72°
4
97°
73°
5
93°
73°
6
N/A
7
86°
66°
8
90°
65°
9
91°
66°
10
87°
70°
11
87°
66°
12
88°
66°
13
87°
66°
14
89°
67°
15
87°
66°
16
87°
65°
17
85°
66°
18
84°
64°
19
82°
61°
20
83°
59°
21
87°
63°
22
85°
63°
23
85°
62°
24
84°
63°
25
85°
62°
26
85°
62°
27
84°
61°
28
85°
62°
29
84°
62°
30
83°
61°
1
83°
61°
2
80°
55°
3
73°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Athens
Athens's September 2026 forecast shows daily high temperatures ranging from 73° to 91°, with overnight lows between 51° and 70°. The average high for September is 85° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Athens. See also: October | November | December.
