Slovenia
Ljubljana in September: weather & travel advice
This month's data profile
Rain shapes the decision
Ljubljana in September is climatically well suited to city breaks and active holidays and hiking. The average daily high is around 20 °C. With about 12 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
70/100 · #4
Warmth
#4
Dryness
#7
Sun
#6
Published best categories: Overall, City break, Active
Ljubljana · SeptemberPhoto: Jeremy Segrott from Cardiff, Wales, UK · CC BY 2.0Climate facts
- Average high
- 20 °C
- Average low
- 10 °C
- Rainy days (est.)
- 12 rainy days (est.)
- Sun (est.)
- 5 h/day
- Humidity
- 77 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| August | 26 | 14 | 13 | 94 | 6.3 | 70 | 0.2 | 75 |
| September (selected) | 20 | 10 | 12 | 123 | 4.6 | 77 | 0.1 | 70 |
| October | 15 | 6 | 12 | 120 | 3.0 | 85 | 0.1 | 51 |
How do the previous and next months compare?
Baseline: September (70/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| August | +5 | +5.2 °C | +4.4 °C | +0.4 | -29.5 mm | +1.7 h | -7.1 % | ±0 m/s |
| October | -19 | -5.3 °C | -4 °C | -0.7 | -3.6 mm | -1.6 h | +7.6 % | ±0 m/s |
All twelve months in context
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Where to stay in Ljubljana
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Useful next decisions
Frequently asked questions
How warm is Ljubljana in September?
The average daily high is around 20 °C, with an average daily low of about 10 °C.
Does it rain a lot in Ljubljana in September?
The curated estimate is about 12 rainy days per month, not a directly measured long-term average. Total precipitation averages around 123 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Ljubljana?
By the climate score, June, July, August and September are the strongest months for Ljubljana. September is one of them.