S
M
T
W
T
F
S
29
50°
34°
30
49°
34°
1
49°
32°
2
48°
28°
3
47°
30°
4
47°
26°
5
46°
27°
6
47°
28°
7
50°
27°
8
49°
36°
9
51°
39°
10
56°
33°
11
59°
25°
12
42°
22°
13
45°
29°
14
Hist. Avg.
50°
28°
15
Hist. Avg.
50°
27°
16
Hist. Avg.
50°
27°
17
Hist. Avg.
50°
27°
18
Hist. Avg.
50°
27°
19
Hist. Avg.
49°
27°
20
Hist. Avg.
49°
26°
21
Hist. Avg.
49°
26°
22
Hist. Avg.
49°
26°
23
Hist. Avg.
49°
26°
24
Hist. Avg.
49°
26°
25
Hist. Avg.
48°
26°
26
Hist. Avg.
48°
26°
27
Hist. Avg.
48°
26°
28
Hist. Avg.
48°
26°
29
Hist. Avg.
48°
26°
30
Hist. Avg.
48°
26°
31
Hist. Avg.
48°
25°
1
Hist. Avg.
48°
25°
2
Hist. Avg.
48°
25°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Sidney
Sidney's December 2026 forecast shows daily high temperatures ranging from 42° to 59°, with overnight lows between 22° and 39°. The average high for December is 49° with an average low of 30°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Sidney. See also: January | February | March.
