S
M
T
W
T
F
S
29
55°
37°
30
58°
31°
1
54°
24°
2
42°
22°
3
45°
29°
4
52°
35°
5
48°
31°
6
42°
26°
7
42°
22°
8
40°
20°
9
40°
21°
10
41°
25°
11
45°
25°
12
50°
27°
13
48°
26°
14
45°
26°
15
45°
27°
16
44°
27°
17
43°
23°
18
41°
19°
19
40°
18°
20
38°
15°
21
37°
21°
22
42°
26°
23
42°
21°
24
41°
18°
25
39°
19°
26
39°
21°
27
40°
21°
28
41°
20°
29
40°
23°
30
40°
21°
31
41°
18°
1
38°
15°
2
36°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Gateway
Gateway's December 2026 forecast shows daily high temperatures ranging from 36° to 58°, with overnight lows between 15° and 37°. The average high for December is 43° with an average low of 23°. 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 Gateway. See also: January | February | March.