Terni, Italy climate
Csa Hot-summer Mediterranean
Terni has a seasonal mild-temperate climate (Hot-summer Mediterranean, Köppen Csa). The hottest month is August with an average daily high near 31°C, while the coldest is January averaging around 2°C at night. Precipitation totals about 804 mm a year and is strongly seasonal — November alone averages 127 mm while July barely receives 31 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)Terni climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 11 | 12 | 15 | 18 | 23 | 28 | 31 | 31 | 26 | 21 | 15 | 11 |
| Avg temp (°C) | 6 | 7 | 9 | 12 | 16 | 21 | 24 | 24 | 20 | 15 | 11 | 7 |
| Avg low (°C) | 2 | 2 | 4 | 6 | 10 | 14 | 17 | 17 | 14 | 10 | 6 | 3 |
| Precipitation (mm) | 53 | 55 | 60 | 65 | 68 | 46 | 31 | 42 | 82 | 90 | 127 | 84 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 11 | 12 | 15 | 18 | 23 | 28 |
| Avg temp (°C) | 6 | 7 | 9 | 12 | 16 | 21 |
| Avg low (°C) | 2 | 2 | 4 | 6 | 10 | 14 |
| Precipitation (mm) | 53 | 55 | 60 | 65 | 68 | 46 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 31 | 26 | 21 | 15 | 11 |
| Avg temp (°C) | 24 | 24 | 20 | 15 | 11 | 7 |
| Avg low (°C) | 17 | 17 | 14 | 10 | 6 | 3 |
| Precipitation (mm) | 31 | 42 | 82 | 90 | 127 | 84 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 56 | 58 | 60 | 57 | 43 | 29 | 30 | 46 | 54 | 62 | 59 |
| Relative humidity (%) | 87 | 83 | 78 | 75 | 71 | 66 | 59 | 59 | 69 | 78 | 85 | 87 |
| Wind speed (km/h) | 9.8 | 10.5 | 10.6 | 9.7 | 8.9 | 8.4 | 8.6 | 8.3 | 9.0 | 9.1 | 9.9 | 10.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 59 | 56 | 58 | 60 | 57 | 43 |
| Relative humidity (%) | 87 | 83 | 78 | 75 | 71 | 66 |
| Wind speed (km/h) | 9.8 | 10.5 | 10.6 | 9.7 | 8.9 | 8.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 29 | 30 | 46 | 54 | 62 | 59 |
| Relative humidity (%) | 59 | 59 | 69 | 78 | 85 | 87 |
| Wind speed (km/h) | 8.6 | 8.3 | 9.0 | 9.1 | 9.9 | 10.0 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the WMO's CLINO 1991–2020 collection, measured at Viterbo, about 50 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.