Ljubljana · Slovenia · 1995–2024 averages
Ljubljana weather, month by month. July is the pick.
Thirty years of averages for Ljubljana, Slovenia — how hot it really feels, when the rain arrives, and what the air is like. July comes out on top; December is the one to skip.
The year at a glance
Tap a month for its full breakdown.
July
bestscore 76.4/100Mild, sticky and some rain, with moderate air.
- Feels like
- 27°
- mild
- Real temp
- 26°
- mild
- Humidity
- 73%
- sticky
- Rain
- 100mm
- some rain
- Cloud cover
- 48%
- bright
- Air quality
- 52
- moderate
- Daylight
- 15.3h
- long days
Month by month, metric by metric
Each strip covers the same twelve months, so you can see where the rain lands and how the air shifts with it.
Feels like
peaks at 27° in July
Real temp
4–26° in the shade across the year
Humidity
73% at its driest, 86% at its most oppressive
Rain
131mm in September, 71mm in January
Cloud cover
48% at its clearest, 75% at its greyest
Air quality
worst in January, cleanest in May
Daylight
8.7h to 15.7h of daylight across the year
Ljubljana's air changes sharply through the year
The air is at its worst in January at 95 AQI (moderate), and at its cleanest in May at 51 (moderate). It tracks the seasons closely.
Every month in full
All twelve months, all seven measures.
| Month | Feels like | Real temp | Humidity | Rain | Cloud cover | Air quality | Daylight |
|---|---|---|---|---|---|---|---|
| January | 1° freezing | 4° freezing | 83% sweaty | 71mm dryish | 71% grey | 95 moderate | 9.1h short |
| February | 3° freezing | 6° cold | 79% sweaty | 79mm some rain | 66% mixed | 89 moderate | 10.4h shortish |
| March | 7° cold | 11° cold | 75% sweaty | 77mm some rain | 61% mixed | 77 moderate | 11.9h shortish |
| April | 13° cold | 15° cool | 74% sticky | 89mm some rain | 61% mixed | 62 moderate | 13.6h even |
| May | 19° cool | 19° cool | 76% sweaty | 111mm some rain | 61% mixed | 51 moderate | 15h long days |
| June | 25° mild | 24° mild | 75% sweaty | 99mm some rain | 55% mixed | 54 moderate | 15.7h long days |
| July | 27° mild | 26° mild | 73% sticky | 100mm some rain | 48% bright | 52 moderate | 15.3h long days |
| August | 27° mild | 25° mild | 75% sweaty | 114mm some rain | 50% bright | 54 moderate | 14.1h long days |
| September | 20° cool | 20° cool | 80% sweaty | 131mm rainy | 59% mixed | 55 moderate | 12.5h even |
| October | 14° cool | 15° cool | 84% sweaty | 109mm some rain | 68% mixed | 66 moderate | 10.9h shortish |
| November | 7° cold | 9° cold | 86% soupy | 124mm some rain | 75% grey | 76 moderate | 9.5h short |
| December | 2° freezing | 5° cold | 86% soupy | 94mm some rain | 73% grey | 95 moderate | 8.7h short |
Ljubljana weather questions
- What is the best time to visit Ljubljana?
- July scores best across temperature, rain, humidity and air quality — 27° feels-like, 100mm of rain and 73% humidity. December is the month to avoid: 94mm of rain and 95 AQI.
- How hot does Ljubljana get?
- July is the peak, at 27° feels-like (26° in the shade) — mild. Even in July it reaches 27°.
- When is the rainy season in Ljubljana?
- September is the wettest month at 131mm, and January the driest at just 71mm.
- Is air quality a problem in Ljubljana?
- January is the worst month at 95 AQI (moderate), and May the best at 51 (moderate).
Weather normals from Open-Meteo (ERA5 reanalysis, 1995–2024) and CAMS air quality (2015–2024), licensed CC-BY-4.0. Contains modified Copernicus Climate Change Service information. These are long-run averages, not forecasts — any given year will differ.
Going in July? You won't be the only one.
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