Climate and monthly weather forecast
Ljubljana, Slovenia

Situated in the heart of Slovenia, Ljubljana holds a stellar reputation for its changing yet enjoyable weather patterns. According to the Köppen climate classification, Ljubljana's weather falls under Marine West Coast, with a warm summer (Cfb). Diligent examination of the climate data reveals a distinct pattern of seasonal change accompanied by shifts in temperatures, rainfall, and sunlight hours.

Throughout the year, the highest average temperature recorded tends to be around 27.3°C (81.1°F) in July while the lowest average is at -2.5°C (27.5°F) in January. Ljubljana's climate shows remarkable variation as the temperature swings from chilly winters, bringing in the new year, to warm and pleasant summers. Variations are similarly evident in the rainfall data. The months from May to November tend to be the wettest, with rainfall ranging from 109mm (4.29") to 147mm (5.79"). Duration of daylight is another key weather parameter that indicates the length of the day. Data suggests that the longest days occur in June, averaging 15.7 hours, with the shortest in December, at 8.7 daylight hours.

Unique characteristics of Ljubljana's climate include the high UV index of 8 in both June and July. These months also see the maximum number of sunshine hours, with June averaging 8.2 hours and July offering 9.5 hours on average. Remarkably, there is no single month without any rainfall, signifying that Ljubljana's climate routinely provides precipitation throughout the year.

The ideal time to visit Ljubljana depends largely on what one seeks to experience. Summer in Ljubljana, specifically from June to August, is exemplified by warm weather with average temperatures oscillating between 24.6°C (76.3°F) to 26.7°C (80.1°F) during the day. These months also observe the longest daylight hours, giving tourists ample time to explore the city's rich history and culture. However, June and July also sport the highest UV index, emphasizing the need for adequate sun protection.

Scheduling a trip to Ljubljana proves less appealing during the winter months from December to February. These months are characterized by the coldest average temperatures, fluctuating between -2.5°C (27.5°F) to 6.4°C (43.5°F). Rainfall during this period remains comparatively low, but the short daylight hours that average between 8.7 to 10.4 hours may restrict outdoor activities and sightseeing.

Spring arrives in Ljubljana with a soothing temperature range from 3.4°C (38.1°F) to 16.1°C (61°F). The period of March to May observes a gentle elevation in temperature, painting a picture of freshness and rejuvenation. Although rainfall inches up from 70mm (2.76") to 99mm (3.9"), it contributes to the city's lush greenery that amplifies the spring delight.

Summertime in Ljubljana, spanning June to August, is a season of ample warmth and extended daylight hours. Daytime temperatures usually hover between 21.4°C (70.5°F) to 27.3°C (81.1°F), with little variation in nighttime lows from 10.3°C (50.5°F) to 15.5°C (59.9°F). Rainfall tends to increase during this period from 109mm (4.29") to 137mm (5.39"), and despite the occasional shower, the abundant sunshine allows for pleasantly warm days.

Autumn in Ljubljana is defined by falling temperatures and increased rainfall. September to November temperatures decline from 21.6°C (70.9°F) to 8.8°C (47.8°F), accompanied by a steady increase in rainfall from 147mm (5.79") to 129mm (5.08"). Daylight hours gradually decrease as well, yet the vibrant autumn hues make for an enchanting sight.

Winter weather in Ljubljana is typically cold with the lowest temperatures reaching -2.5°C (27.5°F) in January. Daytime highs remain under 3.8°C (38.8°F) from December to February. While rainfall drops to between 69mm (2.72") and 107mm (4.21"), daylight hours recede to the shortest of the year. Despite the chill, the snow-covered landscape adds a magical touch to the city's aesthetics.

Ljubljana in Slovenia begins the year with wintry weather. The temperatures often dip below freezing, where the lowest average being -2.5°C (27.5°F). This month is marked by a relatively low number of daylight hours, with the sun setting early and making for long, cold nights. Weather in January »

February brings about a moderate climb in temperatures, marking the transition from the freezing cold of January. The city continues to receive rainfall, although there is a slight decrease in the number of rainy days. The hours of sunlight gradually increase and the cityscape starts to exhibit signs of the impending spring. Weather in February »

With the arrival of March, Ljubljana starts transitioning into warmer weather. The temperature ranges from 1.7°C (35.1°F) to 11.4°C (52.5°F), signaling the end of the frosty winter. The increase in the city’s daylight hours and rainfall suggest the progressive advent of spring. Weather in March »

April in Ljubljana features a palpable shift towards spring. Ljubljana gets doused with the maximum rain during the year at 99mm (3.9") amounting, paving the path for nature’s spring renewal. As the temperatures rise, locals and tourists alike begin venturing outdoor to enjoy the burgeoning greenery and the blossoming flowers across the city’s landscape. Weather in April »

May in Ljubljana welcomes late spring with mild and comfortable weather. Temperatures continue to rise, reaching towards a summertime warmth. The city sees an increase in the overall sunshine hours; meanwhile, the UV index reaches 7, indicating considerable sun strength during the daylight hours. Weather in May »

June in Ljubljana is the beginning of the summer season. The temperature peaks to the high 20s°C marking it the warmest month of the year, between 13.7°C (56.7°F) to 24.6°C (76.3°F). Sunshine is most generous during June with the longest day falling typically on the 21st. Weather in June »

July continues the heat streak in Ljubljana with sunshine clearly dominating the weather pattern. The city sees slight a decrease in rainfall but still possesses a notable frequency of rain days. The UV index also reaches its annual peak, indicating high solar intensity. Weather in July »

August slows down the momentum of the summer heat in Ljubljana. It records a peak temperature slightly lower than July, hinting towards the end of heat waves. It's also marked by an increase in rainfall, which provides much-needed temperance to the city’s summertime heat. Weather in August »

In September, major shifts in weather patterns can be observed in Ljubljana. Despite the rainfall accumulates to 147mm (5.79"), a significant drop in temperate is noticed from the peak summer temperatures. It is also marked by a decrease in sunlight hours, a strong indication of the ongoing transition towards autumn. Weather in September »

October brings an overall coolness to the air in Ljubljana. The temperatures continue to descend, signaling the onset of the cold season. From the lush green landscapes of the summer, the city starts to take on an array of autumn colors. Weather in October »

November is a distinct shift towards the colder part of the year in Ljubljana. The city experiences a significant drop in temperatures which ranges from 2.8°C (37°F) to 8.8°C (47.8°F) indicating the end of the fall season. Weather in November »

December in Ljubljana is a true winter month with crisp air and lower temperatures. The city experiences the fewest daylight hours and the least sunshine in the year. This is combined with cold temperatures that often hover around freezing. Weather in December »