S
M
T
W
T
F
S
30
83°
69°
31
87°
71°
1
95°
77°
2
96°
78°
3
91°
77°
4
93°
76°
5
81°
72°
6
79°
68°
7
N/A
8
85°
72°
9
78°
65°
10
80°
59°
11
80°
64°
12
82°
63°
13
78°
63°
14
79°
60°
15
73°
56°
16
71°
54°
17
75°
58°
18
74°
57°
19
74°
54°
20
73°
53°
21
73°
58°
22
68°
57°
23
71°
57°
24
76°
56°
25
77°
58°
26
76°
57°
27
76°
58°
28
77°
58°
29
77°
59°
30
76°
58°
1
74°
52°
2
69°
46°
3
62°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Berkeley
Berkeley's September 2026 forecast shows daily high temperatures ranging from 62° to 85°, with overnight lows between 43° and 72°. The average high for September is 75° 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 Berkeley. See also: October | November | December.
