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Palermo, Italy climate
Csa Hot-summer Mediterranean
Palermo has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is August with an average daily high near 30°C, while the coldest is February averaging around 9°C at night. Precipitation totals about 526 mm a year and is strongly seasonal — October alone averages 79 mm while July barely receives 4 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)Palermo climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 14 | 14 | 16 | 18 | 22 | 26 | 29 | 30 | 27 | 23 | 19 | 15 |
| Avg temp (°C) | 12 | 11 | 13 | 15 | 18 | 22 | 26 | 26 | 23 | 20 | 16 | 13 |
| Avg low (°C) | 10 | 9 | 10 | 12 | 15 | 19 | 22 | 23 | 21 | 18 | 14 | 11 |
| Precipitation (mm) | 60 | 53 | 39 | 34 | 18 | 12 | 4 | 21 | 61 | 79 | 72 | 72 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 14 | 14 | 16 | 18 | 22 | 26 |
| Avg temp (°C) | 12 | 11 | 13 | 15 | 18 | 22 |
| Avg low (°C) | 10 | 9 | 10 | 12 | 15 | 19 |
| Precipitation (mm) | 60 | 53 | 39 | 34 | 18 | 12 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 30 | 27 | 23 | 19 | 15 |
| Avg temp (°C) | 26 | 26 | 23 | 20 | 16 | 13 |
| Avg low (°C) | 22 | 23 | 21 | 18 | 14 | 11 |
| Precipitation (mm) | 4 | 21 | 61 | 79 | 72 | 72 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 63 | 57 | 54 | 45 | 33 | 18 | 22 | 45 | 52 | 62 | 68 |
| Relative humidity (%) | 76 | 75 | 78 | 79 | 79 | 77 | 74 | 73 | 73 | 75 | 75 | 75 |
| Wind speed (km/h) | 18.4 | 18.6 | 17.2 | 15.2 | 12.5 | 11.2 | 10.8 | 10.5 | 13.3 | 14.5 | 18.1 | 19.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 66 | 63 | 57 | 54 | 45 | 33 |
| Relative humidity (%) | 76 | 75 | 78 | 79 | 79 | 77 |
| Wind speed (km/h) | 18.4 | 18.6 | 17.2 | 15.2 | 12.5 | 11.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 18 | 22 | 45 | 52 | 62 | 68 |
| Relative humidity (%) | 74 | 73 | 73 | 75 | 75 | 75 |
| Wind speed (km/h) | 10.8 | 10.5 | 13.3 | 14.5 | 18.1 | 19.8 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the WMO's CLINO 1991–2020 collection, measured at Ustica, about 68 km from the city centre.
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.