The most comfortable time to visit Ljubljana is from mid August to September, and again from mid May to mid June. For sun, aim for late June to mid August; for walking, go from late March to May.
When to go five ratings · thirty-six ten-day sections · click a cell to read it
For sun, go from late June to mid August. It peaks in late July, at 67. Avoid late September to early May for this: it falls to 0, mostly because it is too cool. The clearest skies come in August, when the sky is typically 46% covered at midday (partly cloudy).
The being outside season here runs from mid August to September, with a second spell from mid May to mid June. It peaks in early September, at 81. The weakest stretch is from mid November to mid March, when it drops to 0, mostly because it is too cold.
For walking, go from late March to May, with a second spell from late September to early November. It peaks in mid October, at 86. Avoid mid January for this: it falls to 4, mostly because it is too cold.
The year, measured
The average temperature in Ljubljana over the whole year is 11°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -1°C. Ljubljana has no sharply defined rainy season: the chance of rain on a given day runs from 18% in January, the driest month, to 30% in November, the wettest. Winds in Ljubljana are highest in April, averaging 1.8 m/s (6 km/h), and lightest in October, at 1.2 m/s (4 km/h). The prevailing wind is from the E. The clearest skies in Ljubljana come in August, when the sky is typically 46% covered; November is the cloudiest month, at 77%.
Month by month Ljubljana climate by month: average temperatures year round · click a month to read it
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | 2°C | -1°C | -1°C | 18% | 67% | 1.3 m/s | 0 | 0 | 10 |
| February | 6°C | 1°C | 3°C | 25% | 66% | 1.5 m/s | 0 | 0 | 27 |
| March | 10°C | 3°C | 7°C | 19% | 58% | 1.7 m/s | 8 | 0 | 53 |
| April | 14°C | 7°C | 12°C | 23% | 57% | 1.8 m/s | 37 | 1 | 75 |
| May | 18°C | 11°C | 17°C | 29% | 67% | 1.6 m/s | 65 | 8 | 75 |
| June | 24°C | 17°C | 24°C | 24% | 49% | 1.6 m/s | 67 | 48 | 36 |
| July | 25°C | 17°C | 26°C | 22% | 46% | 1.5 m/s | 57 | 60 | 26 |
| August | 25°C | 17°C | 26°C | 21% | 46% | 1.4 m/s | 57 | 57 | 28 |
| September | 20°C | 13°C | 20°C | 28% | 56% | 1.3 m/s | 73 | 22 | 63 |
| October | 15°C | 9°C | 14°C | 25% | 64% | 1.2 m/s | 47 | 1 | 83 |
| November | 8°C | 4°C | 6°C | 30% | 77% | 1.2 m/s | 5 | 0 | 40 |
| December | 3°C | 0°C | 0°C | 25% | 74% | 1.2 m/s | 0 | 0 | 10 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Ljubljana weather by season
Year round, Ljubljana has days of about 2°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -1°C to 17°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around November and least likely around January. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Ljubljana weather in winterDecember to February
Winter in Ljubljana has typical daily highs of about 4°C and lows of about 0°C, with a 23% chance of rain on a given day.
Ljubljana weather in springMarch to May
Spring in Ljubljana has typical daily highs of about 14°C and lows of about 7°C, with a 24% chance of rain on a given day.
Ljubljana weather in summerJune to August
Summer in Ljubljana has typical daily highs of about 25°C and lows of about 17°C, with a 22% chance of rain on a given day.
Ljubljana weather in autumnSeptember to November
Autumn in Ljubljana has typical daily highs of about 14°C and lows of about 9°C, with a 28% chance of rain on a given day.
When is the rainy season in Ljubljana?
Ljubljana has no sharply defined rainy season: the chance of rain on a given day runs from 18% in January, the driest month, to 30% in November, the wettest.
What time of year is Ljubljana windiest?
Winds in Ljubljana are highest in April, averaging 1.8 m/s (6 km/h), and lightest in October, at 1.2 m/s (4 km/h). The prevailing wind is from the E.
What is the average temperature in Ljubljana year round?
The average temperature in Ljubljana over the whole year is 11°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -1°C.
Where to go instead in early January, the weakest time here for being outside
How this is worked out
Every figure is a decade of weather-station observations blended into one typical year, in ten-day sections. The ratings, the chart and the feels-like column are read at midday local solar time. Being outside is the Easy outdoors rating, Sun is Sunbathing and Walking is Active outdoors, each out of 100: Good from 55, Ideal from 80. They describe what a time of year is usually like here, not a forecast. The dotted links open the map at that time of year; set its time of day to midday to see these numbers.