Terni climate
Terni (Umbria, Italy) has a hot-summer Mediterranean climate (Köppen Csa). The average temperature over the year is 16 °C61 °F, and about 784 mm31 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Terni climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 1151 | 236 | 744 | 652.6 |
| Feb | 1253 | 337 | 745 | 803.2 |
| Mar | 1660 | 541 | 1050 | 672.6 |
| Apr | 2068 | 847 | 1457 | 572.3 |
| May | 2476 | 1254 | 1865 | 642.5 |
| Jun | 3086 | 1762 | 2374 | 411.6 |
| Jul | 3493 | 1967 | 2780 | 311.2 |
| Aug | 3493 | 2067 | 2780 | 331.3 |
| Sep | 2781 | 1559 | 2170 | 712.8 |
| Oct | 2272 | 1153 | 1762 | 773.0 |
| Nov | 1661 | 846 | 1254 | 1114.4 |
| Dec | 1253 | 439 | 846 | 863.4 |
| Year | 3493 | 236 | 1661 | 78431 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 85% | 65% | 1.7 | 9:23 |
| Feb | 82% | 61% | 2.6 | 10:29 |
| Mar | 78% | 61% | 3.8 | 11:48 |
| Apr | 74% | 60% | 5.0 | 13:19 |
| May | 69% | 58% | 6.1 | 14:36 |
| Jun | 60% | 41% | 7.0 | 15:17 |
| Jul | 51% | 26% | 7.2 | 15:00 |
| Aug | 53% | 28% | 6.3 | 13:54 |
| Sep | 65% | 45% | 4.6 | 12:25 |
| Oct | 75% | 52% | 3.1 | 10:58 |
| Nov | 83% | 63% | 1.9 | 9:41 |
| Dec | 85% | 61% | 1.5 | 9:04 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Terni is like
The warmest month is July, with an average high of 34 °C93 °F and a low of 19 °C67 °F. The coldest is January, when highs average 11 °C51 °F and lows 2 °C36 °F. Seasons are strongly marked: the warmest month is on average 20.1 °C36.2 °F warmer than the coldest.
Annual precipitation is moderate at about 784 mm31 in. The wettest three-month stretch is October–December, which brings 35% of the annual total. The wettest month is November (111 mm4.4 in), the driest is July (31 mm1.2 in).
Relative humidity ranges from 51% in July to 85% in January. The clearest skies (lowest average cloud amount, 26%) are typical of July. Average wind speed near the ground ranges from 2 km/h (1 mph) in June to 2 km/h (1 mph) in February. Daylight lasts from about 9.1 hours in December to 15.3 hours in June.
Best time to visit Terni
Based on these averages, the most comfortable months for sightseeing and outdoor activities are April and May and September and October: average highs of 20 °C68 °F to 27 °C81 °F with 57 mm2.3 in to 77 mm3.0 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 11 °C51 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Terni
- Winter (December–February) — highs 1151 to 12 °C53 °F, lows 236 to 4 °C39 °F, about 77 mm3.0 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Spring (March–May) — highs 1660 to 24 °C76 °F, lows 541 to 12 °C54 °F, about 63 mm2.5 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 3086 to 34 °C93 °F, lows 1762 to 20 °C67 °F, about 35 mm1.4 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Autumn (September–November) — highs 1661 to 27 °C81 °F, lows 846 to 15 °C59 °F, about 87 mm3.4 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
How Terni compares
Compared with Perugia, about 64 km to the north, Terni is on average 2.8 °C5 °F warmer and receives a similar amount of precipitation. The difference is largest in January (3 °C5.5 °F warmer).
Of the 37 places in Italy covered by World Climates, Terni is the 15th warmest by annual mean temperature and the 16th wettest by annual precipitation. See all of them on the Italy climate page.
Places in other countries with the most similar temperature and rainfall pattern: Tirana (Albania, Csa), Elbasan (Albania, Csa) and Split (Croatia, Csa).
Nearby places
- Perugia 64 km · 13 °C56 °F · 801 mm32 in
- Rome 75 km · 17 °C63 °F · 775 mm31 in
- Arezzo 118 km · 14 °C57 °F · 777 mm31 in
- Pescara 128 km · 18 °C64 °F · 788 mm31 in
- San Marino 154 km · 12 °C53 °F · 770 mm30 in
- Rimini 166 km · 16 °C61 °F · 770 mm30 in
- Florence 176 km · 15 °C59 °F · 736 mm29 in
- Forlì 191 km · 15 °C60 °F · 742 mm29 in
Frequently asked questions
What is the warmest month in Terni?
July is the warmest month in Terni, with an average high of 34 °C (93 °F) and an average low of 19 °C (67 °F).
What is the coldest month in Terni?
January is the coldest month, with an average high of 11 °C (51 °F) and an average low of 2 °C (36 °F).
When does it rain the most in Terni?
November is the wettest month with about 111 mm (4.4 in) of precipitation; July is the driest with about 31 mm (1.2 in).
What is the best time to visit Terni?
Judging by long-term averages, the most comfortable months are April and May and September and October.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 385 m, while Terni lies at about 130 m. Temperatures on this page were therefore adjusted by +1.7 °C3 °F using the standard lapse rate of 6.5 °C per 1,000 m.