S
M
T
W
T
F
S
30
68°
62°
31
68°
62°
1
66°
61°
2
64°
60°
3
64°
59°
4
62°
61°
5
64°
60°
6
66°
61°
7
68°
61°
8
68°
60°
9
69°
62°
10
67°
60°
11
65°
60°
12
65°
59°
13
66°
59°
14
63°
56°
15
62°
58°
16
62°
57°
17
61°
58°
18
61°
58°
19
63°
56°
20
62°
53°
21
61°
53°
22
61°
59°
23
64°
59°
24
66°
58°
25
66°
57°
26
65°
55°
27
62°
54°
28
61°
55°
29
62°
56°
30
61°
53°
1
62°
52°
2
61°
57°
3
61°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Saint Helier
Saint Helier's September 2026 forecast shows daily high temperatures ranging from 61° to 69°, with overnight lows between 52° and 62°. The average high for September is 64° with an average low of 58°. 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 Saint Helier. See also: October | November | December.
