S
M
T
W
T
F
S
29
61°
40°
30
61°
38°
1
62°
39°
2
61°
38°
3
66°
37°
4
59°
38°
5
61°
48°
6
68°
51°
7
72°
48°
8
73°
39°
9
70°
38°
10
62°
39°
11
63°
48°
12
66°
49°
13
63°
41°
14
71°
36°
15
66°
37°
16
58°
37°
17
59°
42°
18
61°
48°
19
65°
49°
20
69°
50°
21
71°
50°
22
71°
51°
23
70°
47°
24
72°
44°
25
68°
44°
26
68°
47°
27
67°
39°
28
68°
43°
29
59°
36°
30
69°
33°
31
66°
32°
1
53°
34°
2
58°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Southgate
Southgate's December 2026 forecast shows daily high temperatures ranging from 53° to 73°, with overnight lows between 32° and 51°. The average high for December is 65° with an average low of 42°. 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 Southgate. See also: January | February | March.