S
M
T
W
T
F
S
30
82°
62°
31
85°
66°
1
87°
66°
2
88°
65°
3
88°
61°
4
86°
57°
5
80°
58°
6
80°
61°
7
84°
63°
8
83°
64°
9
84°
63°
10
80°
62°
11
84°
63°
12
84°
63°
13
83°
62°
14
83°
63°
15
84°
62°
16
84°
61°
17
83°
61°
18
82°
55°
19
81°
53°
20
77°
51°
21
73°
50°
22
74°
56°
23
76°
53°
24
79°
50°
25
72°
49°
26
73°
50°
27
72°
49°
28
77°
54°
29
76°
54°
30
78°
54°
1
75°
55°
2
75°
53°
3
71°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lanham
Lanham's September 2026 forecast shows daily high temperatures ranging from 71° to 88°, with overnight lows between 49° and 66°. The average high for September is 80° with an average low of 58°. 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.
