S
M
T
W
T
F
S
30
75°
61°
31
73°
57°
1
72°
54°
2
70°
57°
3
75°
66°
4
70°
57°
5
68°
52°
6
77°
52°
7
75°
61°
8
63°
55°
9
64°
52°
10
70°
55°
11
66°
57°
12
72°
55°
13
70°
59°
14
74°
61°
15
71°
51°
16
64°
50°
17
65°
48°
18
64°
53°
19
68°
50°
20
66°
49°
21
68°
47°
22
67°
51°
23
65°
52°
24
67°
51°
25
68°
49°
26
65°
52°
27
64°
51°
28
65°
52°
29
64°
52°
30
64°
51°
1
63°
50°
2
64°
51°
3
64°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Costessey
Costessey's September 2026 forecast shows daily high temperatures ranging from 63° to 74°, with overnight lows between 47° and 61°. The average high for September is 66° with an average low of 52°. 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 Costessey. See also: October | November | December.
