September · Italy
Best time to visit Bologna in September Weather, crowds & prices
Weather in Bologna in September
Average temperature 21°C, 74 mm of rain, about 27 days with 6+ hours of sunshine and 68% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
8.8/10
Ranked #1 of 12 months
- Avg temp
- 21°C
- Rainfall
- 74 mm
- Humidity
- 68%
- Days with 6h+ sun
- 27
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Bologna scores 8.8/10 for sightseeing and cultural travel - the single best month of the year. Expect around 21°C, 74 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Bologna's porticoes run for miles through a university city built around Piazza Maggiore and the Due Torri.
September in Bologna tops the year's climate scores
September averages 21°C (69°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Rainfall runs 74 mm, so plan one flexible day in three; you still get about 27 days with 6+ hours of sunshine and 12.5 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Bologna at 8.8/10 — the reference point every other month on this page is measured against.
Pack light clothing, a hat and real sun protection, a packable rain layer.
Plan for peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Bologna in September?
- In September, Bologna averages 21°C, 74 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 8.8/10.
- Is September a good time to visit Bologna?
- September earns a 8.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Bologna in September?
- Expect about 74 mm of rain in September. Average humidity is 68% and there are about 27 days with 6+ hours of sunshine.
Curated in Bologna
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Bologna, Italy. Live activities and tours from GetYourGuide, matched to this destination.