Climate Chart of Ljubljana, Slovenia
Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023
For Ljubljana, Slovenia, these climate figures describe 2013–2023.
Climate overview
Temperature
Monthly mean temperatures reach their high in July at 21.7 °C, while the lowest monthly mean is in January at 0.8 °C. These are monthly averages, not daytime highs or lows, so they describe the broad temperature pattern rather than conditions on any particular day. The unweighted mean of the monthly temperature means is 11.0 °C; it summarizes the calendar-month averages without weighting them by the number of days in each month.
Rain
Mean daily rainfall is highest in September at 4.67 mm/day and lowest in January at 1.71 mm/day. These are daily mean amounts for the respective months, not monthly rainfall totals, and they do not reveal how often rain falls or guarantee conditions on a given day. Across the calendar months, the unweighted mean of those daily rainfall means is 3.04 mm/day; this is a summary of monthly averages rather than a day-weighted annual average.
Sunshine
Mean daily sunshine duration peaks in July at 12.30 hours/day and is lowest in December at 4.20 hours/day. These figures describe average sunshine duration, not day length, and do not guarantee how much sunshine an individual day will bring.
Best Travel Time Guide for Ljubljana, Slovenia: Ideal Seasons and Weather Insights
For visitors prioritising cooler monthly average conditions, January is the clearest option in the temperature figures, with a monthly mean of 0.8 °C. This average can help with broad trip planning, but it does not predict the temperature on each day, so flexible layers are sensible. If lower average rainfall is a priority, January has the lowest mean daily rainfall at 1.71 mm/day; this does not mean every day will be dry or indicate rain frequency. In contrast, September records the highest mean daily rainfall, 4.67 mm/day, making rain-ready clothing and a flexible outdoor plan useful considerations.
For outdoor sightseeing planned around average sunshine, July has the highest mean daily sunshine duration at 12.30 hours/day, while December has the lowest at 4.20 hours/day. Sunshine duration is not day length and cannot promise clear weather, so use these averages as a planning guide rather than a forecast; the cooler-temperature and lower-rainfall criteria may point to different months.
Climate Data Overview for Ljubljana, Slovenia
Explore the comprehensive climate data for Ljubljana, Slovenia. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.
| Month | Average: Temperature °C | Rain (mm) / day | Snow (mm) / day | Sunshine (h) / day |
|---|---|---|---|---|
| Jan | 0.8 | 1.71 | 6.20 | 4.59 |
| Feb | 2.4 | 2.44 | 7.60 | 5.43 |
| Mar | 5.7 | 1.85 | 2.21 | 7.77 |
| Apr | 10.3 | 2.63 | 0.80 | 9.41 |
| May | 14.3 | 4.26 | 0.00 | 9.95 |
| Jun | 19.6 | 2.79 | 0.00 | 12.14 |
| Jul | 21.7 | 3.01 | 0.00 | 12.30 |
| Aug | 21.1 | 3.08 | 0.00 | 10.86 |
| Sep | 16.2 | 4.67 | 0.00 | 8.77 |
| Oct | 11.7 | 3.36 | 0.04 | 6.90 |
| Nov | 6.6 | 4.31 | 2.27 | 4.26 |
| Dec | 2.1 | 2.40 | 4.20 | 4.20 |
| Average | 11.0 | 3.04 | 1.94 | 8.05 |
