This report describes the typical weather at the General Ignacio Pesqueira Garcia International Airport (Hermosillo, Mexico) weather station over the course of an average October 22. It is based on the historical records from 2002 to 2012. Earlier records are either unavailable or unreliable.

Hermosillo has a hot desert climate. The area within 25 mi of this station is covered by shrublands (84%), forests (8%), and grasslands (8%).

The temperature typically varies from 65°F to 91°F and is rarely below 59°F or above 99°F.

Temperature

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Average hourly temperature (black) with percentil bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

The coolest hours of the day are from 1am to 8am with the coldest at 6am, at which time the temperature is below 68°F three days out of four.

The warmest hours of the day are from noon to 6pm with the hottest at 3pm, at which time the temperature is above 87°F three days out of four.

The day has gained half its heat by 10am and lost it again by 9pm.

Temperature Bands

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The average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F), comfortable (65°F to 75°F), warm (75°F to 85°F), hot (85°F to 100°F) and sweltering (above 100°F).

On October 22 the Sun rises at 6:30am and sets at 5:46pm.

Solar noon is at 12:08pm.

For reference, on the longest day of the year the Sun rises at 5:25am and sets at 7:26pm, while on the shortest day of the year it rises at 7:14am and sets at 5:30pm.

Astronomical twilight begins and ends 79 minutes before sunrise and after sunset at 5:10am and 7:06pm, respectively.

Nautical twilight begins and ends 52 minutes before sunrise and after sunset at 5:38am and 6:38pm, respectively.

Civil twilight begins and ends 24 minutes before sunrise and after sunset at 6:05am and 6:10pm, respectively.

Solar twilight begins and ends 32 minutes after sunrise and before sunset at 7:02am and 5:14pm, respectively.

Solar Elevation

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Elevation of the Sun above (positive) or below (negative) the horizon (black line). Yellow and gray fills indicate day and night, respectively. Light gray lines are the corresponding curves for the winter and summer equinoxes.

The median cloud cover ranges from 2% (clear) to 18% (mostly clear).

At 2am, the clearest time of the day, the sky is clear, mostly clear, or partly cloudy 73% of the time, and overcast or mostly cloudy 13% of the time.

At 4pm, the cloudiest time of the day, the sky is overcast, mostly cloudy, or partly cloudy 36% of the time, and clear or mostly clear 59% of the time.

The sky is typically clearing in earnest by 9pm.

The clouds have typically started forming in earnest by 10am.

Median Cloud Cover

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Median hourly cloud coverage fraction (black line) with percentile bands (inner band from 40th to 60th percentile, outer band from 25th to 75th percentile).

Cloud Cover Types

The fraction of time spent in each of the five sky cover categories. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

There is a 5% chance that precipitation will be observed at some point during the day.

Probability of Precipitation

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The fraction of days in which various types of precipitation are observed. If more than one type of precipitation is reported in a given day, the more severe precipitation is counted. For example, if light rain is observed in the same day as a thunderstorm, that day counts towards the thunderstorm totals. The order of severity is from the top down in this graph, with the most severe at the bottom.

When precipitation does occur it is most often in the form of moderate rain (32% of days with precipitation have at worst moderate rain), slight rain (29%), drizzle (23%), and thunderstorms (13%).

Types of Precipitation

Relative frequency of various types of precipitation over the course of a typical October 22.

Either snow is exceptionally unlikely to fall at this location on October 22 or this station does not reliably report precipitation types.

The relative humidity typically ranges from 28% (dry) to 63% (mildly humid), rarely dropping below 16% (dry), or exceeding 80% (humid).

The air is driest at 3pm, at which time the relative humidity is less than 34% (comfortable) three days out of four; it is most humid at 5am, exceeding 55% (mildly humid) three days out of four.

Relative Humidity

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Average hourly humidity (black line) with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

The dew point ranges from 48°F to 53°F with an average of 51°F.

For reference, comfortable indoor conditions should have a relative humidity between 30% and 50% with a dew point of less than 65°F.

Dew Point

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Average hourly dew point (black line) with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Sustained wind speeds typically vary from 0 mph to 7 mph (calm to light breeze) over the course of the day.

The peak sustained wind speed typically occurs around 5pm and is rarely outside the range 2 mph to 11 mph (light air to gentle breeze).

The wind is most calm around 3am, rarely exceeding 1 mph (calm).

Wind Speed

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Average hourly wind speed (black line) with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

The wind direction is highly variable and is not predominantly from any single direction. The wind is least often out of the north west (1% of the time), north (2% of the time), north east (2% of the time), south east (3% of the time), east (3% of the time), and west (4% of the time).

Wind Directions

The fraction of time spent with the wind blowing from the various directions over the entire day. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.

Wind Directions Over Day

The fraction of time spent with the wind blowing from the various directions on an hourly basis. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.