S
M
T
W
T
F
S
30
62°
58°
31
65°
58°
1
65°
57°
2
64°
56°
3
62°
58°
4
63°
57°
5
65°
54°
6
63°
57°
7
62°
56°
8
63°
55°
9
61°
55°
10
61°
53°
11
60°
52°
12
60°
54°
13
61°
53°
14
60°
56°
15
61°
55°
16
62°
54°
17
60°
55°
18
62°
51°
19
61°
52°
20
59°
53°
21
61°
54°
22
59°
51°
23
59°
51°
24
58°
54°
25
59°
54°
26
60°
53°
27
60°
51°
28
59°
50°
29
58°
49°
30
58°
49°
1
57°
48°
2
58°
50°
3
59°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Letterston
Letterston's September 2026 forecast shows daily high temperatures ranging from 57° to 65°, with overnight lows between 48° and 58°. The average high for September is 61° 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 Letterston. See also: October | November | December.
