S
M
T
W
T
F
S
30
82°
69°
31
86°
70°
1
83°
70°
2
81°
68°
3
81°
70°
4
79°
68°
5
81°
70°
6
81°
68°
7
82°
68°
8
84°
70°
9
81°
70°
10
85°
69°
11
83°
67°
12
85°
69°
13
85°
68°
14
82°
68°
15
83°
67°
16
83°
68°
17
83°
67°
18
82°
66°
19
81°
66°
20
84°
66°
21
82°
66°
22
82°
68°
23
73°
68°
24
68°
63°
25
65°
63°
26
78°
66°
27
80°
63°
28
84°
64°
29
85°
65°
30
84°
66°
1
83°
63°
2
82°
65°
3
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kathmandu
Kathmandu's September 2026 forecast shows daily high temperatures ranging from 65° to 85°, with overnight lows between 63° and 66°. The average high for September is 80° with an average low of 64°. 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 Kathmandu. See also: October | November | December.
