This report describes the typical weather at the Rome Urbe Airport (Rome, Italy) weather station over the course of an average year. It is based on the historical records from 1998 to 2012. Earlier records are either unavailable or unreliable.
Rome has a mediterranean climate with dry hot summers and mild winters. The area within 25 mi of this station is covered by shrublands (47%), croplands (22%), forests (18%), and oceans and seas (10%).
Over the course of a year, the temperature typically varies from 36°F to 89°F and is rarely below 28°F or above 95°F.
The warm season lasts from June 12 to September 10 with an average daily high temperature above 82°F. The hottest day of the year is July 25, with an average high of 89°F and low of 67°F.
The cold season lasts from November 19 to March 9 with an average daily high temperature below 61°F. The coldest day of the year is February 5, with an average low of 36°F and high of 55°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:07 hours of daylight; the longest day is June 20 with 15:14 hours of daylight.
The earliest sunrise is at 5:33am on June 15 and the latest sunset is at 8:50pm on June 26. The latest sunrise is at 7:39am on January 3 and the earliest sunset is at 4:38pm on December 9.
Daylight saving time (DST) is observed in this location during 2012, starting in the spring on March 25 and ending in the fall on October 28.
The median cloud cover ranges from 32% (mostly clear) to 66% (partly cloudy). The sky is cloudiest on January 4 and clearest on July 18. The clearer part of the year begins around May 25. The cloudier part of the year begins around September 28.
On July 18, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 32% of the time, and overcast or mostly cloudy 5% of the time.
On January 4, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 25% of the time, and clear or mostly clear 7% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around December 6, occurring in 35% of days. Precipitation is least likely around July 19, occurring in 11% of days.
Over the entire year, the most common forms of precipitation are light rain, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 34% of those days with precipitation. It is most likely around February 15, when it is observed during 14% of all days.
Thunderstorms are the most severe precipitation observed during 31% of those days with precipitation. They are most likely around May 10, when it is observed during 13% of all days.
Moderate rain is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around December 6, when it is observed during 13% of all days.
During the warm season, which lasts from June 12 to September 10, there is a 15% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of thunderstorms (57% of days with precipitation have at worst thunderstorms), light rain (28%), and moderate rain (11%).
During the cold season, which lasts from November 19 to March 9, there is a 32% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light rain (39% of days with precipitation have at worst light rain), moderate rain (36%), thunderstorms (17%), and drizzle (6%).
Either snow is exceptionally unlikely to fall at any time during the year at this location or this station does not reliably report precipitation types.
The relative humidity typically ranges from 38% (comfortable) to 93% (very humid) over the course of the year, rarely dropping below 31% (comfortable) and reaching as high as 100% (very humid).
The air is driest around July 25, at which time the relative humidity drops below 42% (comfortable) three days out of four; it is most humid around April 26, exceeding 90% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a year, the dew point typically varies from 29°F (dry) to 69°F (muggy) and is rarely below 20°F (dry) or above 74°F (very muggy).
There are two periods in the year that are most comfortable: The first is between April 6 and June 23 and the second is between September 9 and November 18. The air feels neither too dry nor too muggy during these periods.
Over the course of the year typical wind speeds vary from 0 mph to 12 mph (calm to gentle breeze), rarely exceeding 18 mph (fresh breeze).
The highest average wind speed of 5 mph (light breeze) occurs around March 3, at which time the average daily maximum wind speed is 10 mph (gentle breeze).
The lowest average wind speed of 3 mph (light air) occurs around January 12, at which time the average daily maximum wind speed is 6 mph (light breeze).