S
M
T
W
T
F
S
29
47°
21°
30
46°
17°
1
35°
22°
2
37°
23°
3
44°
28°
4
43°
29°
5
44°
30°
6
45°
28°
7
44°
26°
8
42°
23°
9
38°
21°
10
38°
14°
11
34°
12°
12
29°
18°
13
32°
12°
14
31°
14°
15
30°
15°
16
32°
11°
17
27°
14°
18
27°
21°
19
38°
23°
20
39°
24°
21
39°
22°
22
38°
15°
23
37°
10°
24
28°
8°
25
24°
15°
26
29°
19°
27
33°
19°
28
38°
10°
29
34°
12°
30
25°
15°
31
30°
19°
1
34°
17°
2
35°
16°
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 24° to 47°, with overnight lows between 8° and 30°. The average high for December is 36° with an average low of 18°. 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.
