S
M
T
W
T
F
S
30
73°
51°
31
72°
51°
1
71°
52°
2
71°
49°
3
73°
52°
4
76°
54°
5
71°
53°
6
71°
52°
7
78°
53°
8
77°
57°
9
77°
58°
10
78°
51°
11
76°
47°
12
68°
46°
13
67°
46°
14
66°
44°
15
65°
44°
16
65°
46°
17
67°
45°
18
68°
51°
19
73°
45°
20
69°
43°
21
67°
42°
22
62°
41°
23
73°
52°
24
74°
40°
25
64°
40°
26
Hist. Avg.
68°
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 62° to 78°, with overnight lows between 40° and 58°. The average high for September is 71° with an average low of 48°. 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.
