Italy Bologna Weather in September — Climate Guide
September in Bologna is very-high
Bologna Weather in September — Quick Answer
As of 2026- Avg temp
- 27° / 15°
- Rainfall
- 70mm · 8 days
- Crowds
- Busy
As of 2026, Bologna in September averages a high of 27°C and low of 15°C with 70mm of rain over about 8 days. Warm, pleasant early autumn — around 27°C/15°C. Short sleeves or light layers, with a cardigan for cooler evenings. UV 6 — sunglasses and SPF.
September is very-high for Bologna.
September is one of the very best months to visit Bologna — the summer heat eases, the city revives, and the food scene is back in full force. It averages 27°C/15°C, warm and comfortable.
With trattorias reopened after the August break and the university term restarting, Bologna feels alive and energetic again, while temperatures are perfect for portico walks, the San Luca climb, and terrace aperitivo.
Travel score
Bologna September Weather Stats
Avg High
27°C
Avg Low
15°C
Rainy Days
8
70mm total
Sunshine
7h
Daily avg
Humidity
68%
comfortable
UV Index
6
High
Wind
7 km/h
Gusts 15
Crowds
Busy
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
22 μg/m³
PM10
39 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
27°C
Nighttime
15°C
Humidity and wind affect how the actual temperature feels.
Wind
7 km/h
Max gust 15 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Eased heat with warm, comfortable days
- Food scene back in full after August
- Lively city as university term restarts
- Top window for portico walks and day trips
Cons
- High-season prices and crowds
- Trade fairs can spike hotel rates
- Early-September heat still possible
- Rainfall ticking up
September Events & Festivals
- Top autumn season begins — warm but easing heat
- Trattorias reopen after summer — food scene back in full
- University term restarts — city comes alive
- Possible trade fairs — check the Fiere calendar
Bologna in September — Full Picture
September is one of the very best months to visit Bologna — the summer heat eases, the city revives, and the food scene is back in full force. It averages 27°C/15°C, warm and comfortable.
With trattorias reopened after the August break and the university term restarting, Bologna feels alive and energetic again, while temperatures are perfect for portico walks, the San Luca climb, and terrace aperitivo.
It's high season, so book ahead, and keep an eye on the Fiere trade-fair calendar, which can spike hotel prices. But the weather-and-food combination is hard to beat.
Early September can still bring a few hot, humid days; later in the month it cools pleasantly with the first hints of autumn. The grape harvest season also flavors the regional menus and wine.
Rainfall ticks up a little from the dry summer, but the porticoes keep you covered. Overall a top-tier window alongside May and October — ideal for a food-and-walking trip with the city back to its full self.
What to Wear & What to Pack
Warm, pleasant early autumn — around 27°C/15°C. Short sleeves or light layers, with a cardigan for cooler evenings. UV 6 — sunglasses and SPF.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
18.3°C
8°C
8.7/mo
Summer (Jun·Jul·Aug)
29.7°C
17.7°C
6.3/mo
Autumn (Sep·Oct·Nov)
Current20°C
10.7°C
9/mo
Winter (Dec·Jan·Feb)
7.3°C
0.7°C
7.3/mo
Bologna Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 6° | 0° | 7d·45mm | 3h | 85% | 1 | Quiet | Low season | |
| 9° | 1° | 7d·45mm | 4h | 80% | 2 | Quiet | Low season | |
| 14° | 4° | 8d·55mm | 5h | 75% | 3 | Moderate | Shoulder | |
| April (Best) | 18° | 8° | 9d·65mm | 6h | 70% | 5 | Busy | Peak |
| May (Best) | 23° | 12° | 9d·60mm | 7h | 68% | 6 | Busy | Peak |
| 27° | 16° | 8d·55mm | 8h | 65% | 8 | Busy | Peak | |
| 31° | 19° | 5d·40mm | 9h | 60% | 9 | Moderate | Shoulder | |
| 31° | 18° | 6d·50mm | 8.5h | 62% | 8 | Quiet | Low season | |
| September (Best) | 27° | 15° | 8d·70mm | 7h | 68% | 6 | Busy | Peak |
| October (Best) | 20° | 11° | 9d·80mm | 5h | 75% | 4 | Busy | Peak |
| 13° | 6° | 10d·80mm | 3h | 82% | 2 | Moderate | Shoulder | |
| 7° | 1° | 8d·55mm | 2.5h | 85% | 1 | Moderate | Shoulder |
View Other Months
Bologna September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Bologna?
Bologna in September is very-high. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Bologna in September?
Bologna September averages a high of 27°C and a low of 15°C.
Does it rain much in Bologna in September?
Bologna September averages 70mm of rainfall over about 8 rainy days.
What should I wear in Bologna in September?
Warm, pleasant early autumn — around 27°C/15°C. Short sleeves or light layers, with a cardigan for cooler evenings. UV 6 — sunglasses and SPF.
What time are sunrise and sunset in Bologna in September?
Bologna September sunrise is 06:55 and sunset is 19:25, with 12h 30min of daylight.
What's the air quality like in Bologna in September?
Bologna September air quality (AQI) averages 54, rated Moderate. PM2.5 averages 22μg/m³.
What activities are recommended in Bologna in September?
In September, Bologna is great for The San Luca portico climb, Terrace aperitivo and full trattoria scene, Day trips to Modena, Parma, Ferrara, Florence.
Is September peak season in Bologna?
Bologna September crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Bologna
View Other Months
Planning a September trip to Bologna?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.