Trieste Weather in September
23.3°C high · 15.9°C low · 107 mm rain · 6.2h sun
Sep is a warm month in Trieste — not peak season, but a good time to avoid crowds.
September at a glance
| Metric | Value |
|---|---|
| Average high | 23.3°C |
| Average low | 15.9°C |
| Rainfall | 107 mm |
| Sunshine | 6.2 hours/day |
| Daylight | 12.3 hours |
What to pack in September
Pack comfortable clothes with a light layer for evenings, plus a raincoat and umbrella for Trieste in September.
Trieste weather by month
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Frequently asked questions
What is the weather in Trieste in September?
Highs of 23.3°C and lows of 15.9°C, with about 107 mm of rain and 6.2 hours of sunshine per day.
Is September a good time to visit Trieste?
Sep is a warm month in Trieste — not peak season, but a good time to avoid crowds.
What to do in Trieste · Best time to visit Trieste
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.