S
M
T
W
T
F
S
30
90°
66°
31
86°
69°
1
97°
73°
2
89°
72°
3
93°
72°
4
92°
72°
5
83°
65°
6
85°
60°
7
N/A
8
85°
64°
9
90°
68°
10
92°
67°
11
82°
60°
12
81°
64°
13
85°
65°
14
86°
64°
15
85°
65°
16
83°
57°
17
80°
60°
18
79°
59°
19
80°
59°
20
78°
56°
21
82°
60°
22
79°
59°
23
74°
59°
24
75°
58°
25
75°
58°
26
80°
57°
27
78°
57°
28
78°
56°
29
79°
58°
30
79°
57°
1
78°
57°
2
76°
55°
3
77°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lanham
Lanham's September 2026 forecast shows daily high temperatures ranging from 74° to 92°, with overnight lows between 54° and 68°. The average high for September is 81° with an average low of 60°. 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 Lanham. See also: October | November | December.
