S
M
T
W
T
F
S
30
56°
29°
1
50°
37°
2
54°
42°
3
59°
47°
4
56°
44°
5
52°
37°
6
58°
33°
7
61°
37°
8
61°
37°
9
59°
34°
10
54°
32°
11
57°
36°
12
60°
33°
13
63°
30°
14
59°
31°
15
52°
29°
16
53°
41°
17
54°
47°
18
54°
49°
19
53°
45°
20
56°
37°
21
57°
32°
22
54°
33°
23
52°
45°
24
49°
45°
25
51°
43°
26
51°
30°
27
55°
27°
28
56°
27°
29
53°
27°
30
50°
29°
31
45°
21°
1
47°
23°
2
44°
36°
3
52°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Monfalcone
Monfalcone's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Monfalcone. See also: January | February | March.