Weather in Ljubljana

Planning your day in Ljubljana? Check out the latest weather data, forecasts, and useful charts right in this section.

The climate in Ljubljana, the capital of Slovenia, can be described as moderately continental. This means the city experiences four distinct seasons, each with its own weather characteristics, allowing tourists to choose the most comfortable time to visit depending on their preferences.

Summer in Ljubljana is generally warm and pleasant, with average temperatures in July and August around 20.8°C and maximum values reaching 25-26°C. Winters, conversely, are cool, with average temperatures in January and December just above freezing (1.1°C and 1.7°C respectively), and night frosts are not uncommon. Spring and autumn are transitional seasons with moderate temperatures, gradually rising towards summer and falling towards winter.

As for precipitation, it is distributed quite evenly throughout the year, although May stands out with the highest number of rainy days (on average 20 days) and one of the highest rainfall levels (5 mm), along with September. Overall, the amount of precipitation is moderate, making Ljubljana attractive to visit at any time of year, though it is worth being prepared for possible rain, especially in late spring and early autumn.

Ljubljana observes a distinct annual temperature progression typical of a moderately continental climate. The warmest months are traditionally July and August, when the average daytime temperature settles around 20.8°C, and maximum values can reach 25.7-25.8°C. This creates excellent conditions for summer walks and exploring the city. June also delights with warmth: the average temperature is 18.9°C, and maximums rise to 23.9°C. Summer nights usually bring pleasant coolness, with minimum temperatures in the range of 13.9-15.8°C, allowing for a break from the daytime heat.

Winter in Ljubljana is characterized by cool weather, though severe frosts are rare here. The coldest month is considered to be January with an average temperature of 1.1°C; at this time, minimum night temperatures drop on average to -2.3°C. December and February are also distinguished by coolness, with average temperatures of 1.7°C and 3.1°C respectively, and nightly lows around -1.4°C and -1.2°C. Frosts are possible during these months, especially at night, while maximum daytime temperatures in winter usually fluctuate between 4.6-7.3°C.

The transitional seasons – spring and autumn – demonstrate a smooth change in temperature regimes. Thus, in March, the average temperature is 5.4°C, and in October it is already 11.8°C. Throughout the year, fluctuations between day and night temperatures are noticeable. The difference between average minimum night and average maximum day temperatures often constitutes about 6-10°C, indicating noticeable cooling after sunset, especially on clear days. The greatest daily temperature variations are observed in the summer months (for example, in June the difference between the daily maximum and nightly minimum is about 10°C), which is a characteristic feature of a continental climate.

Precipitation in Ljubljana is distributed throughout the year, and the city does not experience pronounced drought seasons or torrential rains, judging by the total monthly amounts. Average monthly precipitation figures, according to the provided data, remain at a fairly low level, varying from 2 mm to 5 mm. This suggests that even in the "wettest" months, the intensity of precipitation is likely not high.

The highest frequency of precipitation is observed in May, when an average of 20 days with precipitation is recorded. It is followed by June with 15 days, as well as July, August, and September, each counting about 14 days with precipitation. Thus, late spring and summer are periods when the likelihood of catching rain is higher. The "driest" month in terms of frequency is February, where precipitation falls on average for only 7 days.

The nature of precipitation changes depending on the season. In winter months, such as January (average temperature 1.1°C, minimum -2.3°C) and December (average temperature 1.7°C, minimum -1.4°C), there is a high probability of snowfall, although with the overall low amount of precipitation (3-4 mm per month), it is unlikely to be heavy. In February, with rising temperatures, precipitation may be mixed – rain with snow. The rest of the year – spring, summer, and autumn – precipitation falls primarily as rain. Given the small total amount of millimeters even in months with frequent precipitation (for example, 5 mm in May with 20 rainy days), these are most likely light or moderate rains, possibly drizzling in nature, rather than heavy downpours.

Speaking of months with the highest amount of precipitation by volume, these are May and September, with an average of 5 mm falling in each. February stands out as the driest month not only in frequency but also in precipitation volume – just 2 mm. In general, although precipitation occurs year-round, its intensity, judging by the provided data, is usually low, allowing for outdoor activities to be planned with adjustments for possible, but generally not too prolonged or heavy, precipitation.

When planning a trip to Ljubljana, it is important to choose your wardrobe correctly to feel comfortable in any weather. The climate here is moderately continental, which means each season has its own specific features. The key principle is layering. Even in summer, the evening cool may require a light jacket or sweater, and in winter, several layers of clothing will help retain warmth. Regardless of the season, comfortable shoes for walking along the city's cobblestone streets are an absolute necessity. Considering that precipitation is distributed quite evenly throughout the year, with a peak of rainy days in May (about 20 days), as well as frequent rainfall in the summer and autumn months, a compact umbrella or a light waterproof jacket will become your faithful companions.

If your trip falls during the winter months (December-February), when the average temperature hovers around 0°C and night frosts are possible, be sure to bring warm outerwear: a coat or down jacket, hat, scarf, and gloves. Waterproof footwear will also be handy, as precipitation may fall as snow or wet snow. In spring (March-May), the weather is changeable: from cool in March (average temperature +5.4°C) to quite warm in May (+13.4°C). It is recommended to bring a mid-season jacket, sweaters, and be prepared for rain, especially in May. Summer (June-August) in Ljubljana is warm, with an average temperature of around +20°C. Light clothing made from natural fabrics, t-shirts, shorts, and sundresses will be suitable. Do not forget sunscreen, a hat, and sunglasses. However, even in summer, it is worth having a light sweater or cardigan for evening walks. In autumn (September-November), the temperature gradually decreases (from +15.6°C in September to +5.7°C in November). You will need sweaters, jeans, a mid-season jacket, and by the end of autumn – warmer clothes and waterproof shoes, as the number of rainy days increases again.