Rome has a Mediterranean climate with hot, dry summers and mild, wet winters. Average highs range from about 12°C (53°F) in January to 31°C (89°F) in August, and the city receives roughly 800 mm (31 inches) of rain per year, most of it falling between October and January. With nearly 2,500 hours of sunshine annually, Rome earns its reputation as one of Europe’s sunniest capitals.
Summer: Hot, Sunny, and Humid
July and August are the warmest months, with average highs of 31–32°C (88–89°F) and lows that rarely dip below 20°C (67–68°F). What the temperatures alone don’t capture is the humidity. Average relative humidity in July sits around 63%, with a dew point near 17°C (62°F). That combination makes the air feel sticky and heavy, especially in the afternoon when heat radiates off ancient stone and asphalt. August is nearly identical, with humidity averaging 64% and a slightly higher dew point of about 18°C (64°F).
Rain is scarce in summer. July averages just 19 mm of rain across roughly two days, making it the driest month of the year. June and August are slightly wetter but still far below the autumn peaks. Sunshine is abundant: July averages about 11 hours of sun per day, the most of any month.
Winter: Mild but Damp
Rome’s winters feel nothing like northern Europe. Daytime highs in December through February hover between 12–15°C (53–59°F), comfortable enough for walking with a warm coat. Nights are colder, though. Lows regularly drop to 3–4°C (38–40°F), and occasional cold snaps can push temperatures near freezing. Snow is extremely rare.
Winter is the wettest stretch. November leads the year with about 115 mm of rain over nearly 10 rainy days, followed closely by October at 113 mm. December averages 81 mm. Overcast skies are common: December sees only about 3.7 hours of sunshine per day, a stark contrast to the long summer days. If you’re visiting in winter, expect gray mornings and the possibility of several rainy days in a row.
Spring and Fall: The Comfortable Months
Spring warms up gradually. March highs average 16°C (60°F), April reaches 19°C (66°F), and by May the city feels properly warm at 23°C (74°F). Rain is moderate through March and April, with each month averaging about 7–9 rainy days, so an umbrella is still useful. By May, showers become less frequent and the days are long and bright.
Fall mirrors spring in reverse. September still feels like summer, with highs around 27°C (80°F) and only about 6 rainy days. October cools to 22°C (72°F) but marks a sharp increase in rainfall. November is noticeably cooler and wetter, often the rainiest month of the year. The transition from pleasant September to damp November happens quickly.
Rainfall Month by Month
Rome’s precipitation pattern is distinctly Mediterranean, with a dry summer core and a wet autumn-winter season. Here’s the monthly breakdown:
- January: 67 mm, 7 rainy days
- February: 73 mm, 7.6 rainy days
- March: 58 mm, 7.6 rainy days
- April: 81 mm, 9.2 rainy days
- May: 53 mm, 6.2 rainy days
- June: 34 mm, 4.3 rainy days
- July: 19 mm, 2.1 rainy days
- August: 37 mm, 3.3 rainy days
- September: 73 mm, 6.2 rainy days
- October: 113 mm, 8.2 rainy days
- November: 115 mm, 9.7 rainy days
- December: 81 mm, 8 rainy days
October and November alone account for nearly 30% of the year’s total rainfall. If you’re trying to avoid rain, June through August is your safest window.
What to Wear in Each Season
Rome is a walking city built on cobblestones, so sturdy, comfortable shoes matter more than anything else year-round. Beyond that, your packing list shifts significantly by season.
In summer, lightweight cotton or linen clothing is essential. Temperatures regularly exceed 30°C (86°F), and the humidity means you’ll sweat through heavier fabrics fast. A wide-brimmed hat, sunglasses, and sunscreen are practical necessities. One thing to plan for: Rome’s churches and basilicas require covered shoulders and knees, so carry a light scarf or shawl even on the hottest days.
Spring and fall call for layers. A light jacket or trench coat handles the cool mornings and evenings, while afternoons, especially in May and September, can be warm enough for short sleeves. Waterproof shoes and a travel umbrella are worth packing from March through April and again from October onward.
Winter visitors need a proper wool coat or insulated jacket, along with sweaters, thick pants, and waterproof boots. Gloves and a scarf are useful on colder nights. The rain is persistent enough that water-resistant outerwear will get regular use.
Best Time to Visit Based on Weather
April through June and September through mid-October offer the most comfortable balance of warm temperatures, manageable crowds, and reasonable rainfall. May is particularly appealing: highs average 23°C (74°F), rain is below average, and the days are long with generous sunshine.
July and August deliver the most reliable sun but can feel oppressive, especially during afternoon hours when temperatures peak and the humidity builds. Many Romans leave the city in August, which means some smaller shops and restaurants close, though tourist sites stay busy. September retains summer warmth with fewer visitors and lower hotel prices, making it a favorite among experienced travelers.
Winter is the quietest and cheapest time to visit. You’ll deal with shorter days and more rain, but the mild temperatures (rarely below freezing) make outdoor sightseeing manageable, and you’ll have far fewer crowds at major attractions like the Colosseum and Vatican Museums.