1. WeatherSpark.com
  2. Mexico
  3. Baja California Sur
  4. San José del Cabo
  5. September

Average Weather in September in San José del Cabo Mexico

In San José del Cabo, the month of September is characterized by essentially constant daily high temperatures, with daily highs around 87°F throughout the month, rarely exceeding 91°F or dropping below 84°F.

Daily low temperatures are around 81°F, rarely falling below 78°F or exceeding 84°F.

For reference, on August 7, the hottest day of the year, temperatures in San José del Cabo typically range from 81°F to 88°F, while on January 29, the coldest day of the year, they range from 66°F to 75°F.

Average High and Low Temperature in September

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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.

Average Hourly Temperature in September

Average Hourly Temperature in September in San José del Cabo12 AM4 AM8 AM12 PM4 PM8 PM12 AM18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030AugOctwarmhot
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

The month of September in San José del Cabo experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 73% to 50%.

The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 50% of the time.

For reference, on August 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 75%, while on June 6, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 83%.

Cloud Cover in September

Cloud Cover in September in San José del Cabo0%10%20%30%40%50%60%70%80%90%100%18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030AugOctSep 173%Sep 173%Sep 3050%Sep 3050%Sep 1168%Sep 1168%Sep 2158%Sep 2158%overcastmostly cloudypartly cloudymostly clearclear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San José del Cabo, the chance of a wet day over the course of September is very rapidly decreasing, starting the month at 23% and ending it at 13%.

For reference, the year's highest daily chance of a wet day is 25% on September 6, and its lowest chance is 0% on June 5.

Probability of Precipitation in September

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

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

The average sliding 31-day rainfall during September in San José del Cabo is decreasing, starting the month at 2.5 inches, when it rarely exceeds 5.9 inches or falls below 0.4 inches, and ending the month at 1.8 inches, when it rarely exceeds 4.7 inches or falls below 0.1 inches.

The highest average 31-day accumulation is 2.6 inches on September 7.

Average Monthly Rainfall in September

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

Over the course of September in San José del Cabo, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 38 minutes, implying an average daily decrease of 1 minute, 19 seconds, and weekly decrease of 9 minutes, 11 seconds.

The shortest day of the month is September 30, with 11 hours, 57 minutes of daylight and the longest day is September 1, with 12 hours, 35 minutes of daylight.

Hours of Daylight and Twilight in September

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in San José del Cabo is 7:01 AM on September 1 and the latest sunrise is 9 minutes later at 7:10 AM on September 30.

The latest sunset is 7:35 PM on September 1 and the earliest sunset is 29 minutes earlier at 7:06 PM on September 30.

Daylight saving time is observed in San José del Cabo during 2017, but it neither starts nor ends during September, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 6:34 AM and sets 13 hours, 33 minutes later, at 8:07 PM, while on December 21, the shortest day of the year, it rises at 6:55 AM and sets 10 hours, 43 minutes later, at 5:38 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in September

The solar day over the course of September. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Humidity

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 San José del Cabo is gradually decreasing during September, falling from 100% to 97% over the course of the month.

For reference, on August 21, the muggiest day of the year, there are muggy conditions 100% of the time, while on April 10, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in September

Humidity Comfort Levels in September in San José del Cabo0%10%20%30%40%50%60%70%80%90%100%18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030AugOctSep 1100%Sep 1100%Sep 3097%Sep 3097%Sep 11100%Sep 11100%Sep 2199%Sep 2199%miserablemiserableoppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortable
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 San José del Cabo is essentially constant during September, remaining within 0.1 miles per hour of 4.1 miles per hour throughout.

For reference, on December 24, the windiest day of the year, the daily average wind speed is 4.9 miles per hour, while on August 6, the calmest day of the year, the daily average wind speed is 3.7 miles per hour.

The highest daily average wind speed during September is 4.1 miles per hour on September 15.

Average Wind Speed in September

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in San José del Cabo throughout September is predominantly from the west, with a peak proportion of 43% on September 1.

Wind Direction in September

Wind Direction in September in San José del CaboWN0%20%40%60%80%100%18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030AugOctwestsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

San José del Cabo is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in San José del Cabo is essentially constant during September, remaining around 84°F throughout.

The highest average surface water temperature during September is 84°F on September 13.

Average Water Temperature in September

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 San José del Cabo is essentially constant during September, remaining within 0.2 kWh of 5.4 kWh throughout.

The lowest average daily incident shortwave solar energy during September is 5.2 kWh on September 6.

Average Daily Incident Shortwave Solar Energy in September

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of San José del Cabo are 23.059 deg latitude, -109.698 deg longitude, and 89 ft elevation.

The topography within 2 miles of San José del Cabo contains significant variations in elevation, with a maximum elevation change of 741 feet and an average elevation above sea level of 108 feet. Within 10 miles contains significant variations in elevation (3,320 feet). Within 50 miles also contains extreme variations in elevation (6,864 feet).

The area within 2 miles of San José del Cabo is covered by shrubs (78%) and water (20%), within 10 miles by shrubs (43%) and water (39%), and within 50 miles by water (71%) and trees (15%).

Data Sources

This report illustrates the typical weather in San José del Cabo year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

San José del Cabo is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of San José del Cabo, according to the International Standard Atmosphere .

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.