S
M
T
W
T
F
S
30
97°
80°
31
97°
82°
1
96°
80°
2
97°
79°
3
95°
81°
4
97°
78°
5
97°
81°
6
99°
78°
7
99°
79°
8
100°
79°
9
97°
80°
10
95°
79°
11
97°
77°
12
98°
78°
13
97°
78°
14
97°
79°
15
95°
78°
16
97°
78°
17
98°
80°
18
99°
79°
19
90°
75°
20
90°
74°
21
91°
76°
22
91°
75°
23
90°
76°
24
91°
76°
25
92°
74°
26
92°
76°
27
91°
75°
28
91°
75°
29
90°
73°
30
90°
72°
1
87°
72°
2
90°
75°
3
90°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lethem
Lethem's September 2026 forecast shows daily high temperatures ranging from 87° to 100°, with overnight lows between 72° and 80°. The average high for September is 94° with an average low of 76°. 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 Lethem. See also: October | November | December.
