S
M
T
W
T
F
S
29
26°
17°
30
25°
17°
1
29°
18°
2
32°
18°
3
32°
17°
4
31°
17°
5
32°
16°
6
30°
16°
7
30°
15°
8
29°
15°
9
30°
14°
10
28°
13°
11
24°
4°
12
24°
3°
13
23°
2°
14
21°
5°
15
24°
7°
16
23°
6°
17
26°
6°
18
25°
7°
19
23°
7°
20
27°
6°
21
27°
6°
22
26°
5°
23
27°
0°
24
26°
-8°
25
16°
2°
26
16°
-6°
27
17°
2°
28
15°
2°
29
24°
-3°
30
22°
-7°
31
18°
2°
1
20°
-6°
2
20°
-4°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Finland
Finland's December 2026 forecast shows daily high temperatures ranging from 15° to 32°, with overnight lows between -8° and 18°. The average high for December is 25° with an average low of 7°. 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 Finland. See also: January | February | March.
