Weather in Rome

On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are June, July, and August. Rome is in Italy at 41.9°N. The 2001–2020 NASA POWER daily record describes a Mediterranean pattern: dry summers and wetter winters.

August is the warmest month (average 26.5°C, high 32.3°C) and January is the coolest (average 7.5°C, low 3.6°C). Rain is wet season runs from November to December, inside an annual total of 775 mm. The wettest month is November at 114 mm; the driest is July at 26 mm.

When the score favours a visit

The three months with the highest comfort score are June, July, and August: June (22.8°C average, 34 mm, 62% humidity); July (26.1°C average, 26 mm, 55% humidity); August (26.5°C average, 26 mm, 55% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the wet season itself — fewer crowds, greener landscape, heavier rain — aim at November–December instead of the score.

How warm Rome gets

Monthly average highs run from 11.5°C in January to 32.3°C in August. Nights follow the same curve: 3.6°C in January and 20.6°C in August.

Across the year the mean afternoon high is 21.2°C. If you want the smallest day–night shock, look at months where the high and low sit close together; August nights still hold 20.6°C.

Rain through the year

The wet season in Rome starts in November and ends in December (November and December). November is the core of it at 114 mm. July is the other extreme, with 26 mm.

Humidity peaks near 81%. That usually lines up with the wetter months rather than the hottest ones.

The calendar in Rome

The year bottoms out in January. Plan for 3.6°C at night and 11.5°C in the afternoon. April stands apart from the months beside it: 19.3°C / 8.9°C and 56 mm. May brings 57 mm and 10 rainy days; temperatures run from 12.8°C to 23.4°C. In June, Rome averages 28.4°C by day and 17.2°C at night, with 34 mm of rain. July is the driest month, averaging only 26 mm across 4 rainy days. Highs sit near 32.1°C.

Peak heat arrives in August: 32.3°C by day, 20.6°C at night, and 55% humidity. September brings 70 mm and 9 rainy days; temperatures run from 16.6°C to 27.1°C. October: 22.5°C high, 13.0°C low, 82 mm rain, 73% humidity. November is when the wet season typically starts in Rome: highs near 16.9°C, and rainfall jumps to 114 mm (13 rainy days). By December the wet season is ending. Rome still sees about 92 mm, but the next month is usually leaner.

Rome and other cities in Italy

Milan is about 479 km away: Rome is 2.8°C warmer than Milan in its hottest month and 210 mm drier over the year than Milan. Milan’s wettest month is November (137 mm) versus November here.