Average Weather in September in Santa Rosalia Mexico
Daily high temperatures decrease by 3°F, from 94°F to 92°F, rarely falling below 87°F or exceeding 98°F.
Daily low temperatures decrease by 5°F, from 82°F to 77°F, rarely falling below 71°F or exceeding 85°F.
For reference, on August 6, the hottest day of the year, temperatures in Santa Rosalia typically range from 82°F to 95°F, while on January 22, the coldest day of the year, they range from 58°F to 71°F.
Average High and Low Temperature in September
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
The month of September in Santa Rosalia experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 36% to 17%.
The clearest day of the month is September 28, with clear, mostly clear, or partly cloudy conditions 84% of the time.
For reference, on July 30, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 50%, while on June 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 88%.
Cloud Cover Categories in September
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Santa Rosalia, the chance of a wet day over the course of September is decreasing, starting the month at 11% and ending it at 5%.
For reference, the year's highest daily chance of a wet day is 12% on August 25, and its lowest chance is -0% on May 13.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Santa Rosalia is decreasing, starting the month at 1.2 inches, when it rarely exceeds 3.9 inches, and ending the month at 0.6 inches, when it rarely exceeds 1.9 inches or falls below -0.0 inches.
The highest average 31-day accumulation is 1.2 inches on September 2.
Average Monthly Rainfall in September
Over the course of September in Santa Rosalia, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 46 minutes, implying an average daily decrease of 1 minute, 36 seconds, and weekly decrease of 11 minutes, 9 seconds.
The shortest day of the month is September 30, with 11 hours, 54 minutes of daylight and the longest day is September 1, with 12 hours, 40 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Santa Rosalia is 7:08 AM on September 1 and the latest sunrise is 13 minutes later at 7:21 AM on September 30.
The latest sunset is 7:48 PM on September 1 and the earliest sunset is 33 minutes earlier at 7:15 PM on September 30.
Daylight saving time is observed in Santa Rosalia during 2020, but it neither starts nor ends during September, so the entire month is in daylight saving time.
For reference, on June 20, the longest day of the year, the Sun rises at 6:34 AM and sets 13 hours, 52 minutes later, at 8:26 PM, while on December 21, the shortest day of the year, it rises at 7:15 AM and sets 10 hours, 25 minutes later, at 5:40 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in September
The chance that a given day will be muggy in Santa Rosalia is very rapidly decreasing during September, falling from 79% to 43% over the course of the month.
For reference, on August 24, the muggiest day of the year, there are muggy conditions 81% of the time, while on January 14, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in September
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Santa Rosalia is essentially constant during September, remaining within 0.2 miles per hour of 6.9 miles per hour throughout.
For reference, on December 10, the windiest day of the year, the daily average wind speed is 9.8 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 6.4 miles per hour.
Average Wind Speed in September
The hourly average wind direction in Santa Rosalia throughout September is predominantly from the west, with a peak proportion of 40% on September 30.
Wind Direction in September
Santa Rosalia 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 Santa Rosalia is essentially constant during September, remaining within 1°F of 83°F throughout.
The highest average surface water temperature during September is 84°F on September 2.
Average Water Temperature in September
Temperatures in Santa Rosalia are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Santa Rosalia are very rapidly increasing during September, increasing by 979°F, from 5,969°F to 6,948°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Santa Rosalia is essentially constant during September, remaining within 0.1 kWh of 6.2 kWh throughout.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Santa Rosalia are 27.340 deg latitude, -112.268 deg longitude, and 62 ft elevation.
The topography within 2 miles of Santa Rosalia contains significant variations in elevation, with a maximum elevation change of 748 feet and an average elevation above sea level of 176 feet. Within 10 miles contains significant variations in elevation (2,589 feet). Within 50 miles contains large variations in elevation (6,411 feet).
The area within 2 miles of Santa Rosalia is covered by shrubs (52%) and water (44%), within 10 miles by shrubs (50%) and water (49%), and within 50 miles by water (50%) and shrubs (49%).
This report illustrates the typical weather in Santa Rosalia year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Santa Rosalia 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 Santa Rosalia, according to the International Standard Atmosphere .
Time zones for aiports and weather stations are provided by AskGeo.com .