S
M
T
W
T
F
S
30
80°
53°
31
76°
51°
1
73°
51°
2
73°
52°
3
74°
52°
4
74°
51°
5
71°
52°
6
72°
53°
7
71°
57°
8
74°
52°
9
71°
50°
10
71°
50°
11
70°
51°
12
71°
53°
13
70°
52°
14
69°
51°
15
70°
55°
16
69°
49°
17
72°
48°
18
69°
49°
19
69°
55°
20
70°
52°
21
71°
52°
22
Hist. Avg.
69°
49°
23
Hist. Avg.
69°
49°
24
Hist. Avg.
68°
49°
25
Hist. Avg.
68°
48°
26
Hist. Avg.
68°
48°
27
Hist. Avg.
67°
47°
28
Hist. Avg.
67°
47°
29
Hist. Avg.
66°
47°
30
Hist. Avg.
66°
46°
1
Hist. Avg.
66°
46°
2
Hist. Avg.
65°
46°
3
Hist. Avg.
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Atwater
Atwater's September 2026 forecast shows daily high temperatures ranging from 69° to 80°, with overnight lows between 48° and 57°. The average high for September is 72° with an average low of 52°. 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 Atwater. See also: October | November | December.
