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Average Weather in September in Lomas de Barrillas Mexico

Daily high temperatures are around 84°F, rarely falling below 81°F or exceeding 87°F.

Daily low temperatures are around 78°F, rarely falling below 75°F or exceeding 79°F.

For reference, on May 10, the hottest day of the year, temperatures in Lomas de Barrillas typically range from 77°F to 92°F, while on January 30, the coldest day of the year, they range from 68°F to 78°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 Lomas de Barrillas1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM4 AM8 AM12 PM4 PM8 PM12 AMAugOctwarmcomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 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.

Cox’s Bāzār, Bangladesh (9,677 miles away); Sanya, China (9,450 miles); and Lapi, Philippines (8,945 miles) are the far-away foreign places with temperatures most similar to Lomas de Barrillas (view comparison).

Clouds

The month of September in Lomas de Barrillas experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 88% to 83%. The highest chance of overcast or mostly cloudy conditions is 89% on September 14.

The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 17% of the time.

For reference, on September 13, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 89%, while on February 24, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%.

Cloud Cover Categories in September

Cloud Cover Categories in September in Lomas de Barrillas181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctFeb 2473%Feb 2473%Sep 112%Sep 112%Sep 3017%Sep 3017%Sep 1111%Sep 1111%Sep 2113%Sep 2113%clearpartly cloudymostly cloudyovercastmostly clear
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 Lomas de Barrillas, the chance of a wet day over the course of September is decreasing, starting the month at 76% and ending it at 71%.

For reference, the year's highest daily chance of a wet day is 77% on September 12, and its lowest chance is 13% on March 23.

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 Lomas de Barrillas is rapidly increasing, starting the month at 12.7 inches, when it rarely exceeds 19.4 inches or falls below 6.7 inches, and ending the month at 14.0 inches, when it rarely exceeds 21.5 inches or falls below 5.5 inches.

The highest average 31-day accumulation is 14.3 inches on September 24.

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 Lomas de Barrillas, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 29 minutes, implying an average daily decrease of 1 minute, 1 second, and weekly decrease of 7 minutes, 4 seconds.

The shortest day of the month is September 30, with 11 hours, 59 minutes of daylight and the longest day is September 1, with 12 hours, 28 minutes of daylight.

Hours of Daylight and Twilight in September

Hours of Daylight and Twilight in September in Lomas de Barrillas181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 7 minSep 2212 hr, 7 minnightnightdaydaySep 112 hr, 28 minSep 112 hr, 28 min
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 Lomas de Barrillas is 7:03 AM on September 1 and the latest sunrise is 5 minutes later at 7:08 AM on September 30.

The latest sunset is 7:32 PM on September 1 and the earliest sunset is 25 minutes earlier at 7:07 PM on September 30.

Daylight saving time is observed in Lomas de Barrillas during 2018, 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 6:43 AM and sets 13 hours, 13 minutes later, at 7:56 PM, while on December 21, the shortest day of the year, it rises at 6:44 AM and sets 11 hours, 3 minutes later, at 5:47 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in September

Sunrise & Sunset with Twilight and Daylight Saving Time in September in Lomas de Barrillas181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct7:03 AM7:03 AMSep 17:32 PMSep 17:32 PM7:08 AM7:08 AMSep 307:07 PMSep 307:07 PM7:05 AM7:05 AMSep 117:23 PMSep 117:23 PM7:06 AM7:06 AMSep 217:15 PMSep 217:15 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
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 Lomas de Barrillas is essentially constant during September, remaining around 100% throughout.

For reference, on June 19, the muggiest day of the year, there are muggy conditions 100% of the time, while on January 14, the least muggy day of the year, there are muggy conditions 70% of the time.

Humidity Comfort Levels in September

Humidity Comfort Levels in September in Lomas de Barrillas181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%10%20%30%40%50%60%70%80%90%100%AugOctSep 1100%Sep 1100%Sep 30100%Sep 30100%Sep 11100%Sep 11100%Sep 21100%Sep 21100%miserablemiserableoppressiveoppressivemuggymuggyhumidhumid
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 Lomas de Barrillas is increasing during September, increasing from 7.6 miles per hour to 8.9 miles per hour over the course of the month.

For reference, on December 31, the windiest day of the year, the daily average wind speed is 10.0 miles per hour, while on August 27, the calmest day of the year, the daily average wind speed is 7.5 miles per hour.

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 Lomas de Barrillas throughout September is predominantly from the north, with a peak proportion of 65% on September 30.

Wind Direction in September

Wind Direction in September in Lomas de Barrillas181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOcteastnorthsouth
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

Lomas de Barrillas 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 Lomas de Barrillas is essentially constant during September, remaining around 84°F throughout.

The highest average surface water temperature during September is 84°F on September 10.

Average Water Temperature in September

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

Growing Season

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).

Temperatures in Lomas de Barrillas 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

Time Spent in Various Temperature Bands and the Growing Season in September in Lomas de Barrillas181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOct100%Sep 16100%Sep 16comfortablewarmhot
The percentage of time spent in various temperature bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The black line is the percentage chance that a given day is within the growing 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 Lomas de Barrillas are rapidly increasing during September, increasing by 886°F, from 6,847°F to 7,733°F, over the course of the month.

Growing Degree Days in September

The average growing degree days accumulated over the course of September, 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 Lomas de Barrillas is essentially constant during September, remaining within 0.1 kWh of 4.5 kWh throughout.

The lowest average daily incident shortwave solar energy during September is 4.3 kWh on September 13.

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 Lomas de Barrillas are 18.148 deg latitude, -94.526 deg longitude, and 20 ft elevation.

The topography within 2 miles of Lomas de Barrillas contains only modest variations in elevation, with a maximum elevation change of 105 feet and an average elevation above sea level of 29 feet. Within 10 miles also contains only modest variations in elevation (233 feet). Within 50 miles contains only modest variations in elevation (5,472 feet).

The area within 2 miles of Lomas de Barrillas is covered by cropland (60%) and water (31%), within 10 miles by cropland (44%) and water (42%), and within 50 miles by cropland (59%) and water (35%).

Data Sources

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

Lomas de Barrillas 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 Lomas de Barrillas, 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.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.