S
M
T
W
T
F
S
30
80°
58°
31
83°
50°
1
73°
50°
2
72°
57°
3
71°
59°
4
79°
49°
5
81°
47°
6
70°
48°
7
70°
53°
8
72°
54°
9
70°
51°
10
69°
54°
11
69°
52°
12
70°
46°
13
67°
45°
14
67°
47°
15
68°
52°
16
66°
55°
17
74°
55°
18
76°
52°
19
75°
51°
20
69°
46°
21
70°
47°
22
67°
44°
23
63°
42°
24
64°
41°
25
64°
42°
26
66°
46°
27
Hist. Avg.
67°
45°
28
Hist. Avg.
67°
45°
29
Hist. Avg.
66°
44°
30
Hist. Avg.
66°
44°
1
Hist. Avg.
65°
43°
2
Hist. Avg.
65°
43°
3
Hist. Avg.
64°
42°
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 63° to 83°, with overnight lows between 41° and 59°. The average high for September is 71° with an average low of 50°. 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.
