S
M
T
W
T
F
S
30
80°
59°
31
85°
67°
1
90°
70°
2
91°
70°
3
88°
66°
4
76°
64°
5
77°
56°
6
77°
53°
7
77°
55°
8
80°
55°
9
86°
69°
10
81°
64°
11
77°
59°
12
72°
57°
13
83°
63°
14
69°
50°
15
N/A
16
84°
69°
17
79°
63°
18
76°
54°
19
76°
66°
20
68°
60°
21
69°
59°
22
70°
59°
23
71°
57°
24
69°
51°
25
65°
50°
26
68°
49°
27
67°
50°
28
68°
47°
29
72°
52°
30
72°
53°
1
71°
53°
2
72°
51°
3
68°
50°
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 65° to 84°, with overnight lows between 47° and 69°. The average high for September is 71° 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 Atwater. See also: October | November | December.
