Home › Cities › Italy › Acilia-Castel Fusano-Ostia Antica
Acilia-Castel Fusano-Ostia Antica, Italy climate
Csa Hot-summer Mediterranean
Acilia-Castel Fusano-Ostia Antica 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 January averaging around 3°C at night. Precipitation totals about 623 mm a year and is strongly seasonal — November alone averages 99 mm while July barely receives 12 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)Acilia-Castel Fusano-Ostia Antica climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 13 | 14 | 16 | 19 | 23 | 27 | 30 | 30 | 26 | 22 | 18 | 14 |
| Avg temp (°C) | 9 | 9 | 11 | 14 | 18 | 22 | 24 | 25 | 21 | 17 | 13 | 9 |
| Avg low (°C) | 3 | 4 | 6 | 8 | 12 | 16 | 18 | 19 | 16 | 12 | 9 | 5 |
| Precipitation (mm) | 54 | 58 | 52 | 47 | 37 | 19 | 12 | 23 | 60 | 90 | 99 | 73 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 13 | 14 | 16 | 19 | 23 | 27 |
| Avg temp (°C) | 9 | 9 | 11 | 14 | 18 | 22 |
| Avg low (°C) | 3 | 4 | 6 | 8 | 12 | 16 |
| Precipitation (mm) | 54 | 58 | 52 | 47 | 37 | 19 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 30 | 26 | 22 | 18 | 14 |
| Avg temp (°C) | 24 | 25 | 21 | 17 | 13 | 9 |
| Avg low (°C) | 18 | 19 | 16 | 12 | 9 | 5 |
| Precipitation (mm) | 12 | 23 | 60 | 90 | 99 | 73 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 54 | 54 | 53 | 46 | 34 | 21 | 23 | 40 | 49 | 58 | 57 |
| Relative humidity (%) | 81 | 78 | 76 | 72 | 68 | 62 | 55 | 54 | 64 | 73 | 80 | 81 |
| Wind speed (km/h) | 7.8 | 8.6 | 9.1 | 8.8 | 8.1 | 8.0 | 8.2 | 7.9 | 8.1 | 8.0 | 8.7 | 8.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 54 | 54 | 53 | 46 | 34 |
| Relative humidity (%) | 81 | 78 | 76 | 72 | 68 | 62 |
| Wind speed (km/h) | 7.8 | 8.6 | 9.1 | 8.8 | 8.1 | 8.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 21 | 23 | 40 | 49 | 58 | 57 |
| Relative humidity (%) | 55 | 54 | 64 | 73 | 80 | 81 |
| Wind speed (km/h) | 8.2 | 7.9 | 8.1 | 8.0 | 8.7 | 8.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the WMO's CLINO 1991–2020 collection, measured at Roma_fiumicino, about 8 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.