S
M
T
W
T
F
S
30
71°
56°
31
75°
56°
1
76°
55°
2
77°
53°
3
72°
54°
4
73°
55°
5
74°
51°
6
74°
53°
7
72°
54°
8
73°
53°
9
71°
53°
10
69°
51°
11
68°
47°
12
67°
49°
13
67°
48°
14
68°
52°
15
67°
53°
16
71°
51°
17
71°
53°
18
70°
50°
19
71°
46°
20
65°
51°
21
67°
49°
22
66°
47°
23
66°
47°
24
65°
50°
25
65°
52°
26
66°
49°
27
68°
46°
28
67°
44°
29
64°
44°
30
63°
45°
1
62°
42°
2
63°
44°
3
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lower Halstow
Lower Halstow's September 2026 forecast shows daily high temperatures ranging from 62° to 77°, with overnight lows between 42° and 56°. The average high for September is 69° with an average low of 50°. 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 Lower Halstow. See also: October | November | December.