S
M
T
W
T
F
S
30
75°
51°
31
80°
52°
1
80°
55°
2
75°
50°
3
74°
50°
4
74°
51°
5
75°
53°
6
75°
52°
7
76°
51°
8
76°
53°
9
75°
54°
10
76°
57°
11
77°
56°
12
78°
57°
13
78°
58°
14
81°
58°
15
82°
57°
16
82°
56°
17
81°
55°
18
81°
55°
19
80°
54°
20
78°
56°
21
80°
56°
22
81°
55°
23
80°
56°
24
76°
56°
25
72°
55°
26
72°
56°
27
73°
55°
28
74°
56°
29
75°
57°
30
74°
56°
1
77°
53°
2
74°
53°
3
79°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Orinda
Orinda's September 2026 forecast shows daily high temperatures ranging from 72° to 82°, with overnight lows between 50° and 58°. The average high for September is 77° with an average low of 55°. 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 Orinda. See also: October | November | December.
