S
M
T
W
T
F
S
30
79°
60°
31
78°
61°
1
78°
61°
2
86°
60°
3
82°
51°
4
78°
50°
5
75°
51°
6
74°
55°
7
77°
54°
8
81°
55°
9
82°
57°
10
84°
56°
11
83°
51°
12
78°
52°
13
78°
51°
14
80°
54°
15
82°
57°
16
83°
57°
17
82°
56°
18
82°
52°
19
73°
45°
20
71°
44°
21
Hist. Avg.
74°
49°
22
Hist. Avg.
74°
48°
23
Hist. Avg.
73°
48°
24
Hist. Avg.
73°
48°
25
Hist. Avg.
73°
47°
26
Hist. Avg.
72°
47°
27
Hist. Avg.
72°
46°
28
Hist. Avg.
71°
46°
29
Hist. Avg.
71°
46°
30
Hist. Avg.
70°
45°
1
Hist. Avg.
70°
45°
2
Hist. Avg.
70°
44°
3
Hist. Avg.
69°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Ainsworth
Ainsworth's September 2026 forecast shows daily high temperatures ranging from 71° to 86°, with overnight lows between 44° and 61°. The average high for September is 79° 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 Ainsworth. See also: October | November | December.