S
M
T
W
T
F
S
30
64°
47°
31
65°
56°
1
65°
57°
2
60°
57°
3
63°
57°
4
64°
52°
5
64°
48°
6
66°
53°
7
67°
51°
8
72°
50°
9
72°
53°
10
61°
51°
11
62°
51°
12
64°
47°
13
65°
55°
14
72°
50°
15
67°
51°
16
69°
53°
17
69°
53°
18
68°
50°
19
66°
52°
20
66°
50°
21
67°
51°
22
68°
50°
23
66°
50°
24
65°
52°
25
68°
51°
26
67°
52°
27
61°
45°
28
62°
44°
29
61°
44°
30
62°
47°
1
64°
48°
2
65°
48°
3
62°
46°
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 61° to 72°, with overnight lows between 44° and 53°. The average high for September is 66° with an average low of 49°. 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.
