S
M
T
W
T
F
S
29
43°
27°
30
46°
29°
1
45°
28°
2
43°
29°
3
46°
27°
4
44°
25°
5
43°
25°
6
41°
27°
7
44°
25°
8
37°
23°
9
34°
24°
10
36°
23°
11
35°
23°
12
35°
20°
13
36°
16°
14
37°
12°
15
32°
12°
16
29°
14°
17
30°
12°
18
29°
19°
19
33°
18°
20
37°
17°
21
34°
13°
22
33°
13°
23
31°
4°
24
31°
13°
25
27°
10°
26
30°
4°
27
27°
2°
28
22°
3°
29
27°
2°
30
24°
7°
31
26°
16°
1
37°
13°
2
36°
5°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lisbon
Lisbon's December 2026 forecast shows daily high temperatures ranging from 22° to 46°, with overnight lows between 2° and 29°. The average high for December is 35° with an average low of 17°. 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 Lisbon. See also: January | February | March.
