19.12
fri
fri
Day
43°F
N 9 mph
Precip.
85%
85%
Night
34°F
NW 4 mph
Precip.
0%
0%
20.12
sat
sat
Day
41°F
NE 18 mph
Precip.
100%
100%
Night
41°F
E 11 mph
Precip.
100%
100%
21.12
sun
sun
Day
36°F
NW 2 mph
Precip.
0%
0%
Night
32°F
W 4 mph
Precip.
0%
0%
22.12
mon
mon
Day
30°F
W 4 mph
Precip.
0%
0%
Night
30°F
W 4 mph
Precip.
0%
0%
23.12
tue
tue
Day
28°F
NW 2 mph
Precip.
0%
0%
Night
30°F
NE 5 mph
Precip.
0%
0%
24.12
wed
wed
Day
36°F
NE 5 mph
Precip.
0%
0%
Night
36°F
NE 6 mph
Precip.
20%
20%
25.12
thu
thu
Day
37°F
NE 6 mph
Precip.
0%
0%
Night
37°F
N 3 mph
Precip.
49%
49%
26.12
fri
fri
Day
34°F
N 6 mph
Precip.
0%
0%
Night
39°F
E 14 mph
Precip.
27%
27%
27.12
sat
sat
Day
34°F
NE 9 mph
Precip.
0%
0%
Night
32°F
NE 8 mph
Precip.
0%
0%
28.12
sun
sun
Day
37°F
E 18 mph
Precip.
43%
43%
Night
41°F
E 21 mph
Precip.
100%
100%
29.12
mon
mon
Day
39°F
NE 12 mph
Precip.
100%
100%
Night
37°F
NE 7 mph
Precip.
73%
73%
30.12
tue
tue
Day
36°F
N 4 mph
Precip.
0%
0%
Night
37°F
N 5 mph
Precip.
0%
0%
31.12
wed
wed
Day
39°F
NE 7 mph
Precip.
100%
100%
Night
37°F
N 7 mph
Precip.
0%
0%
01.01
thu
thu
Day
36°F
N 6 mph
Precip.
0%
0%
Night
34°F
N 9 mph
Precip.
0%
0%
sea water
temperature
temperature
| Trondheim |
monthly
weather
weather
| Trondheim |
current
weather
weather
| Trondheim |
7 days
forecast
forecast
| Trondheim |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 42.8°F. The highest and lowest sea temperatures during the month were 45.3°F and 40.3°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 41.6°F. The highest and lowest sea temperatures during the month were 43.3°F and 39.0°F.
Air temperature in Trondheim, °F
Precipitation total in Trondheim, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Trondheim
Trondheim on a weather map
Places in Norway:
Name
°F
24 Hours Forecast
Trondheim
Local time: 02:55
December 19, friday
0300
36°F
W
8 mph
8 mph
0600
37°F
W
11 mph
11 mph
0900
43°F
NW
20 mph
20 mph
1200
43°F
N
9 mph
9 mph
1500
39°F
NW
2 mph
2 mph
1800
36°F
NW
5 mph
5 mph
2100
34°F
N
3 mph
3 mph
December 20, saturday
0000
34°F
NW
4 mph
4 mph
