S
M
T
W
T
F
S
30
N/A
31
N/A
1
N/A
2
N/A
3
N/A
4
N/A
5
N/A
6
N/A
7
N/A
8
N/A
9
N/A
10
N/A
11
N/A
12
N/A
13
N/A
14
N/A
15
N/A
16
N/A
17
72°
58°
18
74°
57°
19
76°
59°
20
67°
59°
21
71°
56°
22
77°
58°
23
80°
58°
24
78°
59°
25
79°
60°
26
78°
61°
27
80°
58°
28
78°
57°
29
76°
58°
30
77°
52°
1
78°
57°
2
72°
58°
3
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in San Lorenzo
San Lorenzo's September 2026 forecast shows daily high temperatures ranging from 67° to 80°, with overnight lows between 52° and 61°. The average high for September is 76° with an average low of 58°. 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 Lorenzo. See also: October | November | December.