S
M
T
W
T
F
S
30
72°
48°
31
71°
48°
1
70°
50°
2
71°
50°
3
71°
52°
4
70°
50°
5
71°
48°
6
69°
49°
7
69°
47°
8
70°
45°
9
69°
51°
10
69°
46°
11
67°
46°
12
70°
45°
13
71°
52°
14
74°
47°
15
71°
52°
16
74°
51°
17
73°
52°
18
74°
51°
19
74°
50°
20
73°
47°
21
66°
50°
22
65°
46°
23
66°
48°
24
65°
46°
25
62°
43°
26
69°
40°
27
68°
41°
28
59°
40°
29
58°
41°
30
57°
38°
1
Hist. Avg.
63°
43°
2
Hist. Avg.
63°
43°
3
Hist. Avg.
62°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Keswick
Keswick's September 2026 forecast shows daily high temperatures ranging from 57° to 74°, with overnight lows between 38° and 52°. The average high for September is 69° with an average low of 47°. 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 Keswick. See also: October | November | December.
