S
M
T
W
T
F
S
30
66°
50°
31
70°
48°
1
70°
49°
2
71°
48°
3
67°
48°
4
66°
46°
5
65°
47°
6
66°
46°
7
65°
47°
8
66°
45°
9
65°
51°
10
66°
52°
11
65°
49°
12
65°
49°
13
66°
53°
14
70°
53°
15
72°
52°
16
72°
52°
17
71°
53°
18
71°
49°
19
70°
51°
20
70°
52°
21
69°
52°
22
71°
47°
23
70°
51°
24
67°
51°
25
64°
50°
26
63°
49°
27
64°
47°
28
63°
50°
29
61°
49°
30
62°
50°
1
67°
49°
2
66°
50°
3
69°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kneeland
Kneeland's September 2026 forecast shows daily high temperatures ranging from 61° to 72°, with overnight lows between 45° and 53°. The average high for September is 67° with an average low of 50°. 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 Kneeland. See also: October | November | December.