S
M
T
W
T
F
S
30
64°
45°
31
65°
47°
1
67°
48°
2
70°
53°
3
69°
52°
4
64°
50°
5
65°
47°
6
64°
50°
7
63°
49°
8
64°
50°
9
66°
50°
10
66°
49°
11
65°
53°
12
68°
53°
13
70°
47°
14
66°
45°
15
63°
47°
16
64°
50°
17
66°
51°
18
70°
53°
19
72°
52°
20
72°
47°
21
70°
45°
22
66°
45°
23
62°
44°
24
64°
45°
25
63°
43°
26
62°
45°
27
62°
49°
28
64°
50°
29
70°
44°
30
63°
48°
1
64°
44°
2
Hist. Avg.
64°
47°
3
Hist. Avg.
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Klamath
Klamath's September 2026 forecast shows daily high temperatures ranging from 62° to 72°, with overnight lows between 43° and 53°. The average high for September is 66° with an average low of 48°. 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 Klamath. See also: October | November | December.
