S
M
T
W
T
F
S
30
73°
56°
31
65°
58°
1
73°
60°
2
71°
57°
3
73°
60°
4
73°
54°
5
74°
56°
6
71°
54°
7
84°
58°
8
82°
64°
9
85°
65°
10
89°
60°
11
75°
58°
12
74°
56°
13
76°
57°
14
78°
56°
15
79°
56°
16
79°
57°
17
80°
58°
18
76°
54°
19
79°
56°
20
80°
57°
21
72°
56°
22
72°
53°
23
74°
54°
24
76°
53°
25
75°
53°
26
72°
55°
27
78°
57°
28
79°
57°
29
80°
58°
30
79°
57°
1
79°
57°
2
80°
56°
3
79°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Berkeley
Berkeley's September 2026 forecast shows daily high temperatures ranging from 71° to 89°, with overnight lows between 53° and 65°. 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 Berkeley. See also: October | November | December.
