S
M
T
W
T
F
S
30
79°
52°
31
80°
51°
1
79°
48°
2
79°
47°
3
78°
49°
4
77°
50°
5
75°
43°
6
72°
50°
7
76°
50°
8
78°
52°
9
79°
50°
10
72°
43°
11
70°
45°
12
75°
47°
13
77°
51°
14
79°
50°
15
78°
48°
16
72°
43°
17
70°
46°
18
76°
46°
19
71°
45°
20
77°
48°
21
78°
48°
22
Hist. Avg.
67°
50°
23
Hist. Avg.
67°
49°
24
Hist. Avg.
66°
49°
25
Hist. Avg.
66°
49°
26
Hist. Avg.
66°
49°
27
Hist. Avg.
66°
49°
28
Hist. Avg.
65°
48°
29
Hist. Avg.
65°
48°
30
Hist. Avg.
65°
48°
1
Hist. Avg.
65°
48°
2
Hist. Avg.
64°
48°
3
Hist. Avg.
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Knappa
Knappa's September 2026 forecast shows daily high temperatures ranging from 70° to 80°, with overnight lows between 43° and 52°. The average high for September is 76° 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 Knappa. See also: October | November | December.
