S
M
T
W
T
F
S
30
84°
67°
31
89°
71°
1
92°
74°
2
94°
73°
3
94°
74°
4
N/A
5
81°
58°
6
80°
56°
7
81°
59°
8
85°
68°
9
90°
68°
10
76°
59°
11
76°
57°
12
81°
62°
13
83°
60°
14
77°
56°
15
79°
58°
16
80°
57°
17
81°
54°
18
75°
59°
19
80°
60°
20
79°
60°
21
78°
59°
22
76°
57°
23
74°
53°
24
73°
55°
25
78°
58°
26
74°
52°
27
66°
47°
28
66°
46°
29
65°
47°
30
66°
45°
1
64°
44°
2
65°
49°
3
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Berne
Berne's September 2026 forecast shows daily high temperatures ranging from 64° to 90°, with overnight lows between 44° and 68°. The average high for September is 76° with an average low of 56°. 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 Berne. See also: October | November | December.
