This report describes the typical weather at the Del Norte International Airport (Monterrey, Mexico) weather station over the course of an average year. It is based on the historical records from 2002 to 2012. Earlier records are either unavailable or unreliable.
Monterrey has a hot semi-arid steppe climate. The area within 25 mi of this station is covered by grasslands (61%), shrublands (25%), forests (9%), and croplands (4%).
Over the course of a year, the temperature typically varies from 48°F to 99°F and is rarely below 40°F or above 103°F.
The warm season lasts from April 29 to September 5 with an average daily high temperature above 93°F. The hottest day of the year is June 18, with an average high of 99°F and low of 76°F.
The cold season lasts from November 22 to February 19 with an average daily high temperature below 76°F. The coldest day of the year is January 3, with an average low of 48°F and high of 72°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 10:32 hours of daylight; the longest day is June 20 with 13:46 hours of daylight.
The earliest sunrise is at 6:32am on March 31 and the latest sunset is at 8:37pm on July 1. The latest sunrise is at 7:47am on October 27 and the earliest sunset is at 5:49pm on November 29.
Daylight savings time (DST) is observed in this location during 2012, starting in the spring on April 1 and ending in the fall on October 28.
The median cloud cover ranges from 48% (partly cloudy) to 70% (partly cloudy). The sky is cloudiest on April 28 and clearest on November 15. The clearer part of the year begins around July 29. The cloudier part of the year begins around December 30.
On November 15, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 41% of the time, and overcast or mostly cloudy 31% of the time.
On April 28, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 52% of the time, and clear or mostly clear 20% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around September 18, occurring in 22% of days. Precipitation is least likely around March 25, occurring in 11% of days.
Over the entire year, the most common forms of precipitation are drizzle, light rain, and moderate rain.
Drizzle is the most severe precipitation observed during 46% of those days with precipitation. It is most likely around February 2, when it is observed during 13% of all days.
Light rain is the most severe precipitation observed during 23% of those days with precipitation. It is most likely around September 18, when it is observed during 9% of all days.
Moderate rain is the most severe precipitation observed during 19% of those days with precipitation. It is most likely around September 1, when it is observed during 6% of all days.
During the warm season, which lasts from April 29 to September 5, 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 moderate rain (28% of days with precipitation have at worst moderate rain), light rain (27%), drizzle (22%), and thunderstorms (14%).
During the cold season, which lasts from November 22 to February 19, 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 drizzle (76% of days with precipitation have at worst drizzle), light rain (15%), and moderate rain (8%).
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 33% (comfortable) to 93% (very humid) over the course of the year, rarely dropping below 14% (very dry) and reaching as high as 100% (very humid).
The air is driest around April 5, at which time the relative humidity drops below 42% (comfortable) three days out of four; it is most humid around September 12, exceeding 91% (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 34°F (dry) to 74°F (very muggy) and is rarely below 23°F (dry) or above 76°F (very muggy).
There are two periods in the year that are most comfortable: The first is between January 10 and April 19 and the second is between October 24 and December 23. 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 17 mph (calm to moderate breeze), rarely exceeding 26 mph (strong breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around June 11, at which time the average daily maximum wind speed is 17 mph (moderate breeze).
The lowest average wind speed of 5 mph (light breeze) occurs around September 11, at which time the average daily maximum wind speed is 12 mph (moderate breeze).