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Bologna, Italy climate
Csa Hot-summer Mediterranean
Bologna has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is July with an average daily high near 31°C, while the coldest is January averaging around 0°C at night. Around 602 mm of precipitation falls each year, peaking in November (73 mm) and easing off in July (24 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Bologna climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 10 | 15 | 19 | 24 | 29 | 31 | 31 | 26 | 19 | 13 | 8 |
| Avg temp (°C) | 4 | 5 | 10 | 14 | 18 | 23 | 25 | 25 | 20 | 15 | 9 | 4 |
| Avg low (°C) | 0 | 1 | 4 | 8 | 13 | 17 | 19 | 19 | 15 | 11 | 6 | 1 |
| Precipitation (mm) | 29 | 51 | 49 | 58 | 64 | 61 | 24 | 29 | 52 | 69 | 73 | 43 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 10 | 15 | 19 | 24 | 29 |
| Avg temp (°C) | 4 | 5 | 10 | 14 | 18 | 23 |
| Avg low (°C) | 0 | 1 | 4 | 8 | 13 | 17 |
| Precipitation (mm) | 29 | 51 | 49 | 58 | 64 | 61 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 26 | 19 | 13 | 8 |
| Avg temp (°C) | 25 | 25 | 20 | 15 | 9 | 4 |
| Avg low (°C) | 19 | 19 | 15 | 11 | 6 | 1 |
| Precipitation (mm) | 24 | 29 | 52 | 69 | 73 | 43 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 61 | 58 | 59 | 58 | 48 | 35 | 37 | 48 | 61 | 70 | 67 |
| Relative humidity (%) | 87 | 82 | 76 | 73 | 66 | 59 | 52 | 53 | 65 | 77 | 86 | 88 |
| Wind speed (mph) | 4.2 | 4.6 | 5.0 | 4.7 | 4.5 | 4.4 | 4.3 | 4.1 | 4.2 | 4.1 | 4.1 | 4.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 61 | 58 | 59 | 58 | 48 |
| Relative humidity (%) | 87 | 82 | 76 | 73 | 66 | 59 |
| Wind speed (mph) | 4.2 | 4.6 | 5.0 | 4.7 | 4.5 | 4.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 35 | 37 | 48 | 61 | 70 | 67 |
| Relative humidity (%) | 52 | 53 | 65 | 77 | 86 | 88 |
| Wind speed (mph) | 4.3 | 4.1 | 4.2 | 4.1 | 4.1 | 4.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Bologna, a weather station, about 6 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.