This report describes the typical weather at the Rome Urbe Airport (Rome, Italy) weather station over the course of an average July. 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%).
The month of July is characterized by essentially constant daily high temperatures, with daily highs around 89°F throughout the month, exceeding 95°F or dropping below 81°F only one day in ten.
Over the course of July, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 45 minutes, implying an average day-over-day decrease of 1.5 minutes.
The shortest day of the month is July 31 with 14:26 hours of daylight; the longest day is July 1 with 15:11 hours of daylight.
The earliest sunrise is at 5:38am on July 1; the latest sunset is at 8:50pm on July 1; the latest sunrise is at 6:03am on July 31; the earliest sunset is at 8:30pm on July 31.
Daylight saving time is observed in 2012 but it neither starts nor ends in July, so the entire month is in daylight time.
The median cloud cover is 33% (mostly clear) and does not vary substantially over the course of the month.
On July 16, a representative day, the sky is clear or mostly clear 20% of the time, partly cloudy 12% of the time, and mostly cloudy or overcast 5% of the time.
The average probability that some form of precipitation will be observed in a given day is 12%, with little variation over the course of the month.
Throughout July, the most common forms of precipitation are thunderstorms and light rain.
Thunderstorms are the most severe precipitation observed during 62% of those days with precipitation. They are most likely around July 31, when it is observed during 8% of all days.
Light rain is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around July 1, when it is observed during 4% of all days.
Either snow is exceptionally unlikely to fall at this location in July or this station does not reliably report precipitation types.
The relative humidity typically ranges from 38% (comfortable) to 90% (very humid) over the course of a typical July, 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 July 5, rising above 84% (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 typical July, the dew point typically varies from 57°F (comfortable) to 68°F (muggy) and is rarely below 50°F (very comfortable) or above 74°F (very muggy).
Over the course of July typical wind speeds vary from 0 mph to 12 mph (calm to gentle breeze), rarely exceeding 16 mph (moderate breeze).
The highest average wind speed of 5 mph (light breeze) occurs around July 14, at which time the average daily maximum wind speed is 12 mph (gentle breeze).
The lowest average wind speed of 4 mph (light breeze) occurs around July 1, at which time the average daily maximum wind speed is 12 mph (gentle breeze).