S
M
T
W
T
F
S
30
85°
68°
31
84°
69°
1
83°
69°
2
86°
68°
3
85°
68°
4
85°
69°
5
84°
68°
6
84°
69°
7
85°
68°
8
84°
69°
9
85°
68°
10
85°
69°
11
84°
68°
12
85°
68°
13
85°
69°
14
84°
68°
15
82°
69°
16
84°
70°
17
84°
69°
18
82°
69°
19
82°
68°
20
81°
67°
21
82°
66°
22
85°
67°
23
82°
69°
24
83°
68°
25
83°
68°
26
83°
68°
27
83°
69°
28
82°
68°
29
Hist. Avg.
88°
66°
30
Hist. Avg.
88°
66°
1
Hist. Avg.
88°
66°
2
Hist. Avg.
88°
66°
3
Hist. Avg.
88°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in San Salvador
San Salvador's September 2026 forecast shows daily high temperatures ranging from 81° to 86°, with overnight lows between 66° and 70°. The average high for September is 84° with an average low of 68°. 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 San Salvador. See also: October | November | December.
