S
M
T
W
T
F
S
30
93°
76°
31
92°
76°
1
96°
77°
2
93°
74°
3
95°
73°
4
89°
73°
5
82°
75°
6
N/A
7
91°
74°
8
93°
74°
9
94°
73°
10
92°
68°
11
88°
69°
12
91°
71°
13
89°
73°
14
88°
74°
15
87°
74°
16
82°
75°
17
85°
75°
18
86°
74°
19
88°
71°
20
87°
75°
21
85°
75°
22
83°
74°
23
83°
73°
24
82°
74°
25
82°
74°
26
84°
71°
27
83°
69°
28
82°
69°
29
84°
72°
30
85°
73°
1
86°
73°
2
86°
72°
3
86°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lang Son
Lang Son's September 2026 forecast shows daily high temperatures ranging from 82° to 94°, with overnight lows between 68° and 75°. The average high for September is 86° with an average low of 73°. 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 Lang Son. See also: October | November | December.
