S
M
T
W
T
F
S
30
80°
55°
31
79°
54°
1
78°
58°
2
77°
58°
3
78°
59°
4
78°
53°
5
79°
52°
6
74°
52°
7
75°
53°
8
76°
52°
9
76°
52°
10
77°
50°
11
75°
50°
12
74°
51°
13
73°
50°
14
74°
52°
15
76°
53°
16
78°
53°
17
80°
56°
18
79°
55°
19
73°
47°
20
78°
47°
21
70°
47°
22
Hist. Avg.
72°
51°
23
Hist. Avg.
72°
50°
24
Hist. Avg.
72°
50°
25
Hist. Avg.
71°
50°
26
Hist. Avg.
71°
49°
27
Hist. Avg.
70°
49°
28
Hist. Avg.
70°
48°
29
Hist. Avg.
70°
48°
30
Hist. Avg.
69°
47°
1
Hist. Avg.
69°
47°
2
Hist. Avg.
68°
47°
3
Hist. Avg.
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Sidney
Sidney's September 2026 forecast shows daily high temperatures ranging from 70° to 80°, with overnight lows between 47° and 59°. The average high for September is 76° with an average low of 53°. 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 Sidney. See also: October | November | December.
