S
M
T
W
T
F
S
30
85°
61°
31
86°
60°
1
85°
54°
2
81°
59°
3
80°
53°
4
76°
52°
5
77°
52°
6
80°
58°
7
81°
50°
8
76°
51°
9
77°
58°
10
75°
57°
11
82°
58°
12
83°
57°
13
83°
57°
14
84°
58°
15
83°
57°
16
73°
50°
17
73°
55°
18
Hist. Avg.
78°
50°
19
Hist. Avg.
77°
50°
20
Hist. Avg.
77°
49°
21
Hist. Avg.
77°
49°
22
Hist. Avg.
76°
48°
23
Hist. Avg.
76°
48°
24
Hist. Avg.
76°
47°
25
Hist. Avg.
75°
47°
26
Hist. Avg.
75°
46°
27
Hist. Avg.
74°
46°
28
Hist. Avg.
74°
46°
29
Hist. Avg.
74°
45°
30
Hist. Avg.
73°
45°
1
Hist. Avg.
73°
44°
2
Hist. Avg.
72°
44°
3
Hist. Avg.
72°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lewis
Lewis's September 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 50° and 61°. The average high for September is 80° with an average low of 56°. 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 Lewis. See also: October | November | December.
