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
69°
57°
11
70°
50°
12
72°
60°
13
71°
54°
14
74°
59°
15
72°
53°
16
64°
51°
17
65°
51°
18
67°
50°
19
68°
51°
20
67°
51°
21
68°
50°
22
67°
52°
23
67°
53°
24
66°
52°
25
63°
51°
26
63°
51°
27
65°
52°
28
65°
48°
29
59°
46°
30
59°
46°
1
60°
51°
2
63°
51°
3
62°
50°
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 59° to 74°, with overnight lows between 46° and 60°. 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.
