Rome, Italy climate
Csa Hot-summer Mediterranean
Rome has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is August with an average daily high near 32°C, while the coldest is January averaging around 3°C at night. Precipitation totals about 800 mm a year and is strongly seasonal — November alone averages 115 mm while July barely receives 21 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsRome climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 12 | 13 | 16 | 19 | 24 | 28 | 31 | 32 | 27 | 22 | 17 | 13 |
| Avg temp (°C) | 8 | 8 | 11 | 14 | 18 | 22 | 25 | 26 | 22 | 17 | 13 | 9 |
| Avg low (°C) | 3 | 3 | 6 | 8 | 13 | 17 | 19 | 20 | 16 | 12 | 8 | 5 |
| Precipitation (mm) | 70 | 68 | 60 | 75 | 60 | 32 | 21 | 33 | 70 | 94 | 115 | 102 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 12 | 13 | 16 | 19 | 24 | 28 |
| Avg temp (°C) | 8 | 8 | 11 | 14 | 18 | 22 |
| Avg low (°C) | 3 | 3 | 6 | 8 | 13 | 17 |
| Precipitation (mm) | 70 | 68 | 60 | 75 | 60 | 32 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 32 | 27 | 22 | 17 | 13 |
| Avg temp (°C) | 25 | 26 | 22 | 17 | 13 | 9 |
| Avg low (°C) | 19 | 20 | 16 | 12 | 8 | 5 |
| Precipitation (mm) | 21 | 33 | 70 | 94 | 115 | 102 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 8 | 7 | 8 | 7 | 4 | 3 | 3 | 6 | 8 | 9 | 10 |
| Days with high ≥ 32°C (days) | — | — | — | — | 0.1 | 4 | 10 | 12 | 1 | — | — | — |
| Days with low ≤ 0°C (days) | 5 | 5 | 0.8 | 0.2 | — | — | — | 0.0 | 0.0 | — | 0.4 | 3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 8 | 7 | 8 | 7 | 4 |
| Days with high ≥ 32°C (days) | — | — | — | — | 0.1 | 4 |
| Days with low ≤ 0°C (days) | 5 | 5 | 0.8 | 0.2 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 3 | 6 | 8 | 9 | 10 |
| Days with high ≥ 32°C (days) | 10 | 12 | 1 | — | — | — |
| Days with low ≤ 0°C (days) | — | 0.0 | 0.0 | — | 0.4 | 3 |
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 |
| Clear days (≤ 30% cloud) | 7 | 8 | 8 | 9 | 12 | 16 | 23 | 22 | 14 | 11 | 7 | 8 |
| Partly cloudy days (30–70%) | 11 | 10 | 12 | 11 | 11 | 11 | 6 | 7 | 10 | 10 | 9 | 11 |
| Cloudy days (≥ 70%) | 13 | 11 | 11 | 11 | 8 | 4 | 2 | 2 | 6 | 10 | 13 | 12 |
| Relative humidity (%) | 81 | 78 | 76 | 72 | 68 | 62 | 55 | 54 | 64 | 73 | 80 | 81 |
| Wind speed (m/s) | 2.2 | 2.4 | 2.5 | 2.5 | 2.3 | 2.2 | 2.3 | 2.2 | 2.2 | 2.2 | 2.4 | 2.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 54 | 54 | 53 | 46 | 34 |
| Clear days (≤ 30% cloud) | 7 | 8 | 8 | 9 | 12 | 16 |
| Partly cloudy days (30–70%) | 11 | 10 | 12 | 11 | 11 | 11 |
| Cloudy days (≥ 70%) | 13 | 11 | 11 | 11 | 8 | 4 |
| Relative humidity (%) | 81 | 78 | 76 | 72 | 68 | 62 |
| Wind speed (m/s) | 2.2 | 2.4 | 2.5 | 2.5 | 2.3 | 2.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 21 | 23 | 40 | 49 | 58 | 57 |
| Clear days (≤ 30% cloud) | 23 | 22 | 14 | 11 | 7 | 8 |
| Partly cloudy days (30–70%) | 6 | 7 | 10 | 10 | 9 | 11 |
| Cloudy days (≥ 70%) | 2 | 2 | 6 | 10 | 13 | 12 |
| Relative humidity (%) | 55 | 54 | 64 | 73 | 80 | 81 |
| Wind speed (m/s) | 2.3 | 2.2 | 2.2 | 2.2 | 2.4 | 2.3 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Roma Ciampino, a weather station, about 13 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.