Ljubljana Weather in December
In December, Ljubljana averages a high of 4°C (39°F) and a low of -1°C (30°F), from 54 years of daily records (1971–2025).
4°C
Average high
39°F
-1°C
Average low
30°F
17°C
Record high
63°F · December 17, 2019
-16°C
Record low
3°F · December 4, 1973
What December Is Like in Ljubljana
- 6 of the 10 warmest Decembers on record in Ljubljana have come since 2010.
- December in Ljubljana has become 1.7°C (3.0°F) warmer on average: the 2010–2024 average against 1970–1989.
- The coldest December reading, -16°C (3°F) on December 4, 1973, has not been matched in 52 years.
- On average, 19 nights in December drop below freezing.
At least 1 mm of rain falls on 28% of December days, and the month averages 104 mm in total.
Warmest: 2000 (7.4°C)Latest: 2024 (6.0°C)10-year averageLong-run average (3.9°C)
Look Up a Day in December
See the weather in Ljubljana on any December date, year by year.
Source: NOAA GHCN-Daily, Ljubljana Bezigrad (1971–2025). Averages cover 1971–2025. How we compute this