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 89°F, while the coldest is January averaging around 35°F at night. Precipitation totals about 32 inches a year and is strongly seasonal — November alone averages 5.0 inches while July barely receives 1.21 inches.
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 (°F) | 51 | 53 | 59 | 64 | 73 | 82 | 88 | 89 | 78 | 69 | 59 | 52 |
| Avg temp (°F) | 43 | 44 | 49 | 54 | 62 | 70 | 75 | 76 | 68 | 60 | 51 | 44 |
| Avg low (°F) | 35 | 35 | 39 | 44 | 50 | 57 | 62 | 63 | 57 | 51 | 43 | 37 |
| Precipitation (in) | 2.1 | 2.2 | 2.4 | 2.6 | 2.7 | 1.8 | 1.2 | 1.7 | 3.2 | 3.5 | 5.0 | 3.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 51 | 53 | 59 | 64 | 73 | 82 |
| Avg temp (°F) | 43 | 44 | 49 | 54 | 62 | 70 |
| Avg low (°F) | 35 | 35 | 39 | 44 | 50 | 57 |
| Precipitation (in) | 2.1 | 2.2 | 2.4 | 2.6 | 2.7 | 1.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 89 | 78 | 69 | 59 | 52 |
| Avg temp (°F) | 75 | 76 | 68 | 60 | 51 | 44 |
| Avg low (°F) | 62 | 63 | 57 | 51 | 43 | 37 |
| Precipitation (in) | 1.2 | 1.7 | 3.2 | 3.5 | 5.0 | 3.3 |
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 (mph) | 6.1 | 6.5 | 6.6 | 6.0 | 5.5 | 5.2 | 5.3 | 5.1 | 5.6 | 5.7 | 6.2 | 6.2 |
| 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 (mph) | 6.1 | 6.5 | 6.6 | 6.0 | 5.5 | 5.2 |
| 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 (mph) | 5.3 | 5.1 | 5.6 | 5.7 | 6.2 | 6.2 |
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.