This report describes the typical weather at the Carrasco International Airport (Montevideo, Uruguay) weather station over the course of an average year. It is based on the historical records from 1976 to 2012. Earlier records are either unavailable or unreliable.
Montevideo has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by oceans and seas (48%), croplands (46%), grasslands (3%), and built-up areas (3%).
Over the course of a year, the temperature typically varies from 43Â°F to 81Â°F and is rarely below 34Â°F or above 90Â°F.
The warm season lasts from December 4 to March 19 with an average daily high temperature above 76Â°F. The hottest day of the year is January 19, with an average high of 81Â°F and low of 64Â°F.
The cold season lasts from May 25 to August 31 with an average daily high temperature below 62Â°F. The coldest day of the year is July 14, with an average low of 43Â°F and high of 57Â°F.
The length of the day varies significantly over the course of the year. The shortest day is June 20 with 9:48 hours of daylight; the longest day is December 21 with 14:29 hours of daylight.
The earliest sunrise is at 6:13am on October 6 and the latest sunset is at 9:02pm on January 3. The latest sunrise is at 7:53am on July 1 and the earliest sunset is at 5:39pm on June 10.
Daylight saving time (DST) is observed in this location during 2012, starting in the spring on October 7 and ending in the fall on March 11.
The median cloud cover ranges from 45% (partly cloudy) to 76% (partly cloudy). The sky is cloudiest on July 9 and clearest on February 3. The clearer part of the year begins around October 29. The cloudier part of the year begins around May 9.
On February 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 58% of the time, and overcast or mostly cloudy 25% of the time.
On July 9, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 57% of the time, and clear or mostly clear 26% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around October 13, occurring in 40% of days. Precipitation is least likely around December 26, occurring in 33% of days.
Over the entire year, the most common forms of precipitation are thunderstorms, moderate rain, drizzle, and light rain.
Thunderstorms are the most severe precipitation observed during 40% of those days with precipitation. They are most likely around January 11, when it is observed during 20% of all days.
Moderate rain is the most severe precipitation observed during 27% of those days with precipitation. It is most likely around May 27, when it is observed during 13% of all days.
Drizzle is the most severe precipitation observed during 16% of those days with precipitation. It is most likely around July 21, when it is observed during 9% of all days.
Light rain is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around June 21, when it is observed during 5% of all days.
During the warm season, which lasts from December 4 to March 19, there is a 36% 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 (52% of days with precipitation have at worst thunderstorms), moderate rain (23%), light rain (12%), and drizzle (9%).
During the cold season, which lasts from May 25 to August 31, there is a 36% 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 (30% of days with precipitation have at worst thunderstorms), moderate rain (29%), drizzle (23%), and light rain (13%).
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 51% (mildly humid) to 99% (very humid) over the course of the year, rarely dropping below 32% (comfortable) and reaching as high as 100% (very humid).
The air is driest around January 14, at which time the relative humidity drops below 60% (mildly humid) three days out of four; it is most humid around June 21, exceeding 100% (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 39Â°F (dry) to 68Â°F (muggy) and is rarely below 29Â°F (dry) or above 73Â°F (very muggy).
There are two periods in the year that are most comfortable: The first is between March 19 and June 30 and the second is between August 3 and December 26. 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 19 mph (calm to fresh breeze), rarely exceeding 30 mph (strong breeze).
The highest average wind speed of 12 mph (moderate breeze) occurs around November 7, at which time the average daily maximum wind speed is 19 mph (fresh breeze).
The lowest average wind speed of 10 mph (gentle breeze) occurs around May 2, at which time the average daily maximum wind speed is 16 mph (moderate breeze).