Climate of Rome
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Rome and its metropolitan area has a Mediterranean climate ( Köppen climate classification: ''Csa''), with mild winters and hot summers. According to Troll-Paffen climate classification, Rome has a ''warm-temperate subtropical'' climate (''Warmgemäßigt-subtropisches Zonenklima''). According to Siegmund/Frankenberg climate classification, Rome has a subtropical climate.


Daylight

Rome is more southerly than most cities in Europe, and the duration of daylight throughout the year is more similar to Chicago or New York City (all three at approximately 40°N) than Berlin (~52°N) or Paris (48°N). Days in winter are not as short as in northern Europe, and the average duration of daylight in December, January and February is 10 hours (for comparison: London or Moscow or Warsaw – about 8 hours).


Sunshine and UV index

Sunshine duration Sunshine duration or sunshine hours is a climatological indicator, measuring duration of sunshine in given period (usually, a day or a year) for a given location on Earth, typically expressed as an averaged value over several years. It is a gene ...
is about 2,500-2,700 hours per year, from 147 – average 4.7 hours of sunshine per day in December to 338 – average 10.9 hours of sunshine per day in July. With the exception of Madrid,
Lisbon Lisbon (; pt, Lisboa ) is the capital and largest city of Portugal, with an estimated population of 544,851 within its administrative limits in an area of 100.05 km2. Grande Lisboa, Lisbon's urban area extends beyond the city's administr ...
and Athens, Rome has the highest UV index between European capitals (only in the continent) and values close to that of Chicago at 41.9 °N as ultraviolet radiation is less interfered with by other geographic variables, but with a moderate annual average with index equal to 5, which allows direct exposure to the sun at some times of the year. Values range from 1 (December) to 9 (July).


Sea temperature


Climatic data


Recent data


1991-2020 period


Old data


1971-2000 period


1961-1990 period


See also

*
Climate of Ancient Rome The climate of ancient Rome varied throughout the existence of that civilization. In the first half of the 1st millennium BC the climate of Italy was more humid and cool than now and the presently arid south saw more precipitation. The northern reg ...


References

{{Reflist Rome Rome Geography of Rome Metropolitan City of Rome Capital