S
M
T
W
T
F
S
29
47°
36°
30
46°
35°
1
47°
39°
2
53°
43°
3
54°
39°
4
48°
35°
5
45°
34°
6
45°
36°
7
52°
35°
8
49°
39°
9
53°
35°
10
46°
35°
11
51°
38°
12
51°
40°
13
49°
41°
14
51°
40°
15
51°
40°
16
50°
39°
17
50°
39°
18
51°
40°
19
51°
39°
20
50°
40°
21
52°
40°
22
50°
39°
23
53°
39°
24
50°
40°
25
51°
39°
26
50°
40°
27
50°
40°
28
51°
39°
29
52°
39°
30
51°
41°
31
52°
40°
1
51°
39°
2
50°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Selsey
Selsey's December 2026 forecast shows daily high temperatures ranging from 45° to 54°, with overnight lows between 34° and 43°. The average high for December is 50° with an average low of 39°. 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 Selsey. See also: January | February | March.