Weather in Bologna in September 2025
Average weather
Average temperature in Bologna in September
Going from a maximum of +32°C during the day to a minimum of +13°C during the night, the temperature in September averages around +28°C.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +28°C to +28°C.
Is Bologna warm or cold in September?
Bologna is typically warm in September.
Maximum temperatures go down compared to the previous month from +30°C to +26°C. The minimum temperature also goes down from +20°C to +16°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Bologna:
Climate in Bologna in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +30°C | +26°C | +20°C | ||||
| Min. temperature | ||||||
| +11°C | +7°C | +2°C | ||||
| Max. temperature | ||||||
| +40°C | +34°C | +32°C | ||||
| Rainfall | ||||||
| 65 mm | 194 mm | 182 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 62% | 69% | 78% | ||||
| Air pressure | ||||||
| 1013 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 15 | 12 | 9 | ||||
| Cloudy days | ||||||
| 2 | 4 | 9 | ||||
| Rainy days | ||||||
| 10 | 11 | 12 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting colder in September. From +30°C in the day, the average maximum temperature lowers to +26°C. Prepare for more rain. Average rainfall goes from 65 mm to 194 mm. Humidity rises from 62% to 69%. The average wind speed doesn’t change much during September, staying around 1 m/s. The days becoming less sunny, going from 15 sunny days in August to 12 in September.
Next month (October) brings a further decline in the weather.
Wind
The average wind speed is 2 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Bologna is gradually increasing during September, going from 2 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Bologna?
Climate Change over Years
The climate in Bologna in September has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+17°C) and the highest in 2022 (+20°C). The driest year was 2006 with only 549 mm of rainfall, and the wettest year was 2019 with 11684 mm.
FAQ
Is September a good time to visit Bologna?
Can you sunbathe in Bologna in September?
Is Bologna rainy in September?
Is it sunny in Bologna in September?
Other cities in Italy
Monthly weather in Bologna
Source of the data
For this page, we’ve looked at the typical weather in Bologna, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.