S
M
T
W
T
F
S
30
78°
53°
31
77°
55°
1
80°
54°
2
83°
55°
3
79°
53°
4
77°
53°
5
84°
54°
6
85°
56°
7
Hist. Avg.
80°
55°
8
Hist. Avg.
80°
55°
9
Hist. Avg.
80°
55°
10
Hist. Avg.
80°
55°
11
Hist. Avg.
80°
55°
12
Hist. Avg.
80°
55°
13
Hist. Avg.
80°
55°
14
Hist. Avg.
80°
54°
15
Hist. Avg.
79°
54°
16
Hist. Avg.
79°
54°
17
Hist. Avg.
79°
54°
18
Hist. Avg.
79°
54°
19
Hist. Avg.
79°
54°
20
Hist. Avg.
79°
54°
21
Hist. Avg.
79°
54°
22
Hist. Avg.
79°
54°
23
Hist. Avg.
79°
54°
24
Hist. Avg.
78°
54°
25
Hist. Avg.
78°
53°
26
Hist. Avg.
78°
53°
27
Hist. Avg.
78°
53°
28
Hist. Avg.
78°
53°
29
Hist. Avg.
78°
53°
30
Hist. Avg.
78°
53°
1
Hist. Avg.
78°
53°
2
Hist. Avg.
78°
52°
3
Hist. Avg.
77°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Atherton
Atherton's September 2026 forecast shows daily high temperatures ranging from 77° to 85°, with overnight lows between 53° and 56°. The average high for September is 80° with an average low of 54°. 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 Atherton. See also: October | November | December.
