S
M
T
W
T
F
S
30
72°
59°
31
66°
61°
1
68°
59°
2
75°
59°
3
72°
64°
4
68°
61°
5
70°
57°
6
82°
59°
7
70°
63°
8
64°
59°
9
64°
57°
10
68°
55°
11
68°
59°
12
68°
57°
13
70°
63°
14
73°
61°
15
66°
59°
16
66°
59°
17
64°
59°
18
66°
59°
19
68°
61°
20
68°
59°
21
72°
57°
22
75°
58°
23
70°
56°
24
73°
61°
25
73°
57°
26
67°
56°
27
68°
57°
28
67°
58°
29
72°
61°
30
68°
57°
1
66°
56°
2
67°
58°
3
61°
57°
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 75°, with overnight lows between 56° and 61°. The average high for September is 69° 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.
