Fall Weather in Valparaíso Mexico

Daily high temperatures decrease by 6°F, from 78°F to 72°F, rarely falling below 66°F or exceeding 83°F.

Daily low temperatures decrease by 16°F, from 56°F to 41°F, rarely falling below 34°F or exceeding 60°F.

For reference, on May 27, the hottest day of the year, temperatures in Valparaíso typically range from 55°F to 86°F, while on January 13, the coldest day of the year, they range from 38°F to 69°F.

The figure below shows you a compact characterization of the hourly average fall temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Cochabamba, Bolivia (3,757 miles away); Howick, South Africa (9,563 miles); and Sayyān, Yemen (9,043 miles) are the far-away foreign places with temperatures most similar to Valparaíso (view comparison).

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The fall in Valparaíso experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 81% to 45%. The highest chance of overcast or mostly cloudy conditions is 82% on September 13. The lowest chance of overcast or mostly cloudy conditions is 40% on November 13.

The clearest day of the fall is November 13, with clear, mostly clear, or partly cloudy conditions 60% of the time.

For reference, on September 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 82%, while on May 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Valparaíso, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 58% and ending it at 6%.

For reference, the year's highest daily chance of a wet day is 64% on August 21, and its lowest chance is 1% on April 7.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the fall in Valparaíso is very rapidly decreasing, starting the season at 4.0 inches, when it rarely exceeds 5.9 inches or falls below 2.1 inches, and ending the season at 0.4 inches, when it rarely exceeds 1.2 inches or falls below -0.0 inches.

Over the course of the fall in Valparaíso, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 43 minutes, implying an average daily decrease of 1 minute, 9 seconds, and weekly decrease of 8 minutes, 1 second.

The shortest day of the fall is November 30, with 10 hours, 51 minutes of daylight and the longest day is September 1, with 12 hours, 34 minutes of daylight.

The earliest sunrise of the fall in Valparaíso is 6:36 AM on September 1 and the latest sunrise is 41 minutes later at 7:17 AM on November 30.

The latest sunset is 7:10 PM on September 1 and the earliest sunset is 1 hour, 2 minutes earlier at 6:08 PM on November 27.

Daylight saving time is not observed in Valparaíso during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 6:10 AM and sets 13 hours, 32 minutes later, at 7:42 PM, while on December 21, the shortest day of the year, it rises at 7:30 AM and sets 10 hours, 44 minutes later, at 6:14 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the fall of 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Valparaíso is essentially constant during the fall, remaining around 0% throughout.

For reference, on September 7, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Valparaíso is essentially constant during the fall, remaining within 0.2 miles per hour of 5.8 miles per hour throughout.

For reference, on March 26, the windiest day of the year, the daily average wind speed is 7.6 miles per hour, while on July 26, the calmest day of the year, the daily average wind speed is 5.1 miles per hour.

The wind direction in Valparaíso during the fall is predominantly out of the east from September 1 to November 10 and the west from November 10 to November 30.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Valparaíso typically lasts for 9.2 months (279 days), from around February 27 to around December 2, rarely starting before January 17 or after March 26, and rarely ending before November 5 or after January 8.

The fall in Valparaíso is very likely fully within the growing season, with the chance that a given day is in the growing season rapidly decreasing from 100% to 53% over the course of the season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Valparaíso are very rapidly increasing during the fall, increasing by 1,147°F, from 3,494°F to 4,640°F, over the course of the season.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Valparaíso is decreasing during the fall, falling by 1.3 kWh, from 6.0 kWh to 4.7 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Valparaíso are 22.771 deg latitude, -103.570 deg longitude, and 6,217 ft elevation.

The topography within 2 miles of Valparaíso contains only modest variations in elevation, with a maximum elevation change of 469 feet and an average elevation above sea level of 6,284 feet. Within 10 miles contains only modest variations in elevation (4,075 feet). Within 50 miles also contains extreme variations in elevation (8,107 feet).

The area within 2 miles of Valparaíso is covered by grassland (73%) and shrubs (22%), within 10 miles by grassland (43%) and shrubs (29%), and within 50 miles by grassland (39%) and trees (38%).