S
M
T
W
T
F
S
30
83°
62°
31
85°
64°
1
85°
64°
2
84°
63°
3
85°
59°
4
78°
59°
5
80°
62°
6
84°
60°
7
78°
59°
8
83°
57°
9
84°
63°
10
84°
61°
11
83°
53°
12
79°
60°
13
78°
59°
14
81°
61°
15
77°
60°
16
81°
59°
17
82°
60°
18
83°
60°
19
80°
59°
20
81°
51°
21
79°
48°
22
71°
56°
23
71°
57°
24
74°
57°
25
78°
58°
26
80°
49°
27
79°
47°
28
69°
46°
29
68°
50°
30
68°
46°
1
66°
46°
2
68°
53°
3
69°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bath
Bath's September 2026 forecast shows daily high temperatures ranging from 66° to 85°, with overnight lows between 46° and 64°. The average high for September is 78° with an average low of 57°. 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 Bath. See also: October | November | December.