S
M
T
W
T
F
S
30
71°
58°
31
72°
56°
1
70°
56°
2
69°
57°
3
70°
56°
4
70°
55°
5
69°
55°
6
69°
54°
7
68°
55°
8
68°
55°
9
67°
54°
10
68°
55°
11
69°
56°
12
70°
55°
13
67°
52°
14
68°
52°
15
67°
55°
16
67°
55°
17
68°
53°
18
63°
55°
19
64°
48°
20
64°
51°
21
Hist. Avg.
64°
52°
22
Hist. Avg.
63°
51°
23
Hist. Avg.
63°
51°
24
Hist. Avg.
63°
51°
25
Hist. Avg.
63°
51°
26
Hist. Avg.
63°
51°
27
Hist. Avg.
62°
51°
28
Hist. Avg.
62°
50°
29
Hist. Avg.
62°
50°
30
Hist. Avg.
62°
50°
1
Hist. Avg.
62°
50°
2
Hist. Avg.
62°
50°
3
Hist. Avg.
61°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Leiston
Leiston's September 2026 forecast shows daily high temperatures ranging from 63° to 72°, with overnight lows between 48° and 58°. The average high for September is 68° with an average low of 54°. 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 Leiston. See also: October | November | December.
