S
M
T
W
T
F
S
30
54°
37°
31
61°
41°
1
61°
42°
2
60°
43°
3
61°
40°
4
55°
36°
5
57°
36°
6
57°
38°
7
58°
40°
8
60°
35°
9
53°
39°
10
51°
32°
11
50°
33°
12
49°
39°
13
49°
39°
14
52°
41°
15
53°
39°
16
56°
42°
17
55°
42°
18
56°
41°
19
54°
41°
20
54°
40°
21
56°
40°
22
53°
39°
23
52°
38°
24
52°
37°
25
49°
34°
26
49°
32°
27
45°
36°
28
48°
36°
29
46°
37°
30
48°
36°
1
45°
34°
2
46°
31°
3
43°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lansdowne
Lansdowne's September 2026 forecast shows daily high temperatures ranging from 43° to 61°, with overnight lows between 31° and 43°. The average high for September is 53° with an average low of 38°. 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 Lansdowne. See also: October | November | December.
