S
M
T
W
T
F
S
30
79°
56°
31
75°
64°
1
70°
62°
2
73°
61°
3
79°
67°
4
83°
68°
5
78°
61°
6
70°
56°
7
79°
50°
8
80°
55°
9
77°
58°
10
81°
66°
11
76°
54°
12
73°
51°
13
75°
67°
14
75°
50°
15
68°
49°
16
74°
52°
17
76°
62°
18
81°
63°
19
67°
57°
20
66°
58°
21
70°
57°
22
68°
50°
23
68°
48°
24
67°
47°
25
63°
48°
26
60°
55°
27
67°
60°
28
62°
53°
29
70°
57°
30
70°
58°
1
75°
63°
2
79°
56°
3
67°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Niantic
Niantic's September 2026 forecast shows daily high temperatures ranging from 62° to 79°, with overnight lows between 52° and 63°. The average high for September is 71° with an average low of 57°. 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 Niantic. See also: October | November | December.
