12.18
thu
thu
DAY

54°F
N 2 mph
precip
83%
83%
NIGHT

46°F
NE 2 mph
precip
72%
72%
12.19
fri
fri
DAY

52°F
N 1 mph
precip
75%
75%
NIGHT

46°F
SE 1 mph
precip
60%
60%
12.20
sat
sat
DAY

56°F
S 2 mph
precip
0%
0%
NIGHT

40°F
W 5 mph
precip
0%
0%
12.21
sun
sun
DAY

54°F
SW 4 mph
precip
0%
0%
NIGHT

44°F
W 3 mph
precip
0%
0%
12.22
mon
mon
DAY

54°F
NW 4 mph
precip
100%
100%
NIGHT

46°F
W 3 mph
precip
100%
100%
12.23
tue
tue
DAY

54°F
W 2 mph
precip
100%
100%
NIGHT

44°F
SW 5 mph
precip
100%
100%
12.24
wed
wed
DAY

50°F
N 2 mph
precip
100%
100%
NIGHT

42°F
W 2 mph
precip
24%
24%
12.25
thu
thu
DAY

54°F
W 2 mph
precip
43%
43%
NIGHT

46°F
W 5 mph
precip
71%
71%
12.26
fri
fri
DAY

52°F
W 5 mph
precip
69%
69%
NIGHT

46°F
W 8 mph
precip
75%
75%
12.27
sat
sat
DAY

52°F
SW 9 mph
precip
21%
21%
NIGHT

38°F
W 9 mph
precip
0%
0%
12.28
sun
sun
DAY

46°F
SW 12 mph
precip
0%
0%
NIGHT

32°F
W 6 mph
precip
0%
0%
12.29
mon
mon
DAY

46°F
SW 4 mph
precip
0%
0%
NIGHT

32°F
W 5 mph
precip
0%
0%
12.30
tue
tue
DAY

46°F
SW 6 mph
precip
0%
0%
NIGHT

32°F
SW 13 mph
precip
0%
0%
12.31
wed
wed
DAY

38°F
SW 17 mph
precip
0%
0%
NIGHT

30°F
SW 11 mph
precip
0%
0%
Sea water
temperature
temperature
| Piran |
Weather in
December
December
| Piran |
7 day weather
forecast
forecast
| Piran |
10 day weather
forecast
forecast
| Piran |
14 day weather
forecast
forecast
| Piran |
Monthly weather
averages
averages
| Piran |
Piran Sea Water Temperature in December, °F
The average sea surface temperature in December 2025 for Piran was 57.5°F. The maximum and minimum values were 56.0°F and 58.8°F respectively.
Slovenia Resorts:
NAME
F°
| Bohinjsko Jezero | ![]() |
+40 |
| Cerkno | ![]() |
+50 |
| Dolenjske Toplice | ![]() |
+40 |
| Isola | ![]() |
+48 |
| Koper | ![]() |
+48 |
| Kranjska Gora | ![]() |
+40 |
| Ljubljana | ![]() |
+46 |
| Maribor | ![]() |
+42 |
| Moravske Toplice | ![]() |
+40 |
| Piran | ![]() |
+48 |
| Portoroz | ![]() |
+48 |
| Rogaska Slatina | ![]() |
+44 |
| Strunjan | ![]() |
+48 |
| Terme Radenci | ![]() |
+42 |
| Zrece | ![]() |
+44 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Piran
Local time: 10:16
18 dec, thursday
| 1200 | ![]() |
54°F | N 2 mph |
| 1500 | ![]() |
54°F | E 2 mph |
| 1800 | ![]() |
52°F | N 2 mph |
| 2100 | ![]() |
46°F | N 1 mph |
19 dec, friday
| 0000 | ![]() |
46°F | NE 2 mph |
| 0300 | ![]() |
46°F | N 2 mph |
| 0600 | ![]() |
46°F | N 2 mph |
| 0900 | ![]() |
46°F | NE 1 mph |




























