S
M
T
W
T
F
S
30
74°
48°
31
80°
44°
1
73°
46°
2
75°
45°
3
73°
52°
4
79°
51°
5
80°
51°
6
80°
50°
7
71°
44°
8
71°
43°
9
72°
47°
10
75°
50°
11
78°
49°
12
79°
51°
13
71°
50°
14
75°
51°
15
71°
50°
16
71°
50°
17
72°
45°
18
71°
50°
19
71°
48°
20
74°
43°
21
72°
42°
22
70°
44°
23
72°
46°
24
75°
47°
25
75°
48°
26
76°
48°
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 42° and 52°. The average high for September is 74° 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.
