S
M
T
W
T
F
S
30
73°
59°
31
73°
58°
1
74°
60°
2
73°
62°
3
73°
60°
4
74°
64°
5
73°
64°
6
74°
65°
7
79°
65°
8
78°
64°
9
77°
63°
10
74°
64°
11
76°
64°
12
74°
63°
13
76°
62°
14
70°
62°
15
70°
61°
16
69°
61°
17
70°
60°
18
70°
61°
19
71°
60°
20
70°
59°
21
78°
59°
22
78°
55°
23
75°
51°
24
68°
50°
25
67°
57°
26
69°
56°
27
71°
58°
28
74°
56°
29
74°
55°
30
73°
54°
1
72°
56°
2
72°
55°
3
73°
54°
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 67° to 79°, with overnight lows between 50° and 65°. The average high for September is 73° with an average low of 59°. 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.
