Ljubljana Weather in September
20.9°C high · 9.8°C low · 135 mm rain · 5.9h sun
Sep is a warm month in Ljubljana — not peak season, but a good time to avoid crowds.
September at a glance
| Metric | Value |
|---|---|
| Average high | 20.9°C |
| Average low | 9.8°C |
| Rainfall | 135 mm |
| Sunshine | 5.9 hours/day |
| Daylight | 12.3 hours |
What to pack in September
Pack a jacket and layers, plus a raincoat and umbrella for Ljubljana in September.
Ljubljana weather by month
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Frequently asked questions
What is the weather in Ljubljana in September?
Highs of 20.9°C and lows of 9.8°C, with about 135 mm of rain and 5.9 hours of sunshine per day.
Is September a good time to visit Ljubljana?
Sep is a warm month in Ljubljana — not peak season, but a good time to avoid crowds.
What to do in Ljubljana · Best time to visit Ljubljana
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.