S
M
T
W
T
F
S
30
88°
54°
31
79°
56°
1
80°
61°
2
80°
59°
3
84°
54°
4
84°
61°
5
87°
55°
6
86°
52°
7
78°
51°
8
77°
49°
9
77°
53°
10
83°
56°
11
80°
50°
12
77°
49°
13
76°
48°
14
78°
55°
15
82°
53°
16
83°
47°
17
75°
46°
18
73°
46°
19
73°
47°
20
74°
51°
21
71°
53°
22
72°
48°
23
72°
53°
24
73°
46°
25
75°
54°
26
78°
54°
27
79°
44°
28
74°
46°
29
70°
52°
30
75°
51°
1
69°
52°
2
71°
50°
3
68°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in S.N.P.J.
S.N.P.J.'s September 2026 forecast shows daily high temperatures ranging from 68° to 88°, with overnight lows between 43° and 61°. The average high for September is 77° with an average low of 51°. 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 S.N.P.J.. See also: October | November | December.
