S
M
T
W
T
F
S
30
88°
60°
31
86°
61°
1
77°
60°
2
84°
61°
3
83°
60°
4
84°
63°
5
86°
55°
6
85°
53°
7
Hist. Avg.
82°
58°
8
Hist. Avg.
81°
58°
9
Hist. Avg.
81°
57°
10
Hist. Avg.
81°
57°
11
Hist. Avg.
81°
56°
12
Hist. Avg.
80°
56°
13
Hist. Avg.
80°
56°
14
Hist. Avg.
80°
55°
15
Hist. Avg.
80°
55°
16
Hist. Avg.
79°
54°
17
Hist. Avg.
79°
54°
18
Hist. Avg.
78°
54°
19
Hist. Avg.
78°
53°
20
Hist. Avg.
78°
53°
21
Hist. Avg.
78°
52°
22
Hist. Avg.
77°
52°
23
Hist. Avg.
77°
51°
24
Hist. Avg.
76°
51°
25
Hist. Avg.
76°
51°
26
Hist. Avg.
76°
50°
27
Hist. Avg.
75°
50°
28
Hist. Avg.
75°
49°
29
Hist. Avg.
74°
49°
30
Hist. Avg.
74°
48°
1
Hist. Avg.
74°
48°
2
Hist. Avg.
73°
48°
3
Hist. Avg.
73°
47°
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 77° to 88°, with overnight lows between 53° and 63°. The average high for September is 84° with an average low of 59°. 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.
