Average Weather in September in Osumacinta Mexico
Daily high temperatures decrease by 2°F, from 87°F to 85°F, rarely falling below 81°F or exceeding 90°F.
Daily low temperatures are around 71°F, rarely falling below 68°F or exceeding 73°F. The highest daily average low temperature is 71°F on September 14.
For reference, on May 2, the hottest day of the year, temperatures in Osumacinta typically range from 71°F to 91°F, while on January 15, the coldest day of the year, they range from 62°F to 79°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
Mineros, Bolivia (3,112 miles away); Campo Grande, Brazil (3,673 miles); and Mikumi, Tanzania (9,020 miles) are the far-away foreign places with temperatures most similar to Osumacinta (view comparison).
The month of September in Osumacinta experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 90% throughout the month. The highest chance of overcast or mostly cloudy conditions is 92% on September 15.
The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 12% of the time.
For reference, on June 25, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 92%, while on February 14, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.
Cloud Cover Categories in September
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Osumacinta, the chance of a wet day over the course of September is rapidly decreasing, starting the month at 84% and ending it at 77%.
For reference, the year's highest daily chance of a wet day is 86% on September 11, and its lowest chance is 16% on March 23.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Osumacinta is essentially constant, remaining about 10.4 inches throughout, and rarely exceeding 15.7 inches or falling below 5.7 inches.
The highest average 31-day accumulation is 10.8 inches on September 17.
Average Monthly Rainfall in September
Over the course of September in Osumacinta, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 27 minutes, implying an average daily decrease of 56 seconds, and weekly decrease of 6 minutes, 34 seconds.
The shortest day of the month is September 30, with 12 hours, 0 minutes of daylight and the longest day is September 1, with 12 hours, 27 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Osumacinta is 6:58 AM on September 1 and the latest sunrise is 4 minutes later at 7:02 AM on September 30.
The latest sunset is 7:25 PM on September 1 and the earliest sunset is 24 minutes earlier at 7:01 PM on September 30.
Daylight saving time is observed in Osumacinta 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 6:39 AM and sets 13 hours, 8 minutes later, at 7:48 PM, while on December 21, the shortest day of the year, it rises at 6:36 AM and sets 11 hours, 7 minutes later, at 5:44 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in September
The chance that a given day will be muggy in Osumacinta is essentially constant during September, remaining within 2% of 96% throughout.
The highest chance of a muggy day during September is 97% on September 15.
For reference, on September 15, the muggiest day of the year, there are muggy conditions 97% of the time, while on January 15, the least muggy day of the year, there are muggy conditions 35% of the time.
Humidity Comfort Levels in September
The average hourly wind speed in Osumacinta is gradually increasing during September, increasing from 4.7 miles per hour to 5.6 miles per hour over the course of the month.
For reference, on January 29, the windiest day of the year, the daily average wind speed is 7.4 miles per hour, while on June 21, the calmest day of the year, the daily average wind speed is 4.3 miles per hour.
Average Wind Speed in September
Wind Direction in September
Osumacinta 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 Osumacinta is essentially constant during September, remaining within 1°F of 86°F throughout.
Average Water Temperature in September
Temperatures in Osumacinta 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 Osumacinta are rapidly increasing during September, increasing by 785°F, from 6,232°F to 7,016°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Osumacinta is essentially constant during September, remaining within 0.1 kWh of 4.9 kWh throughout.
The lowest average daily incident shortwave solar energy during September is 4.7 kWh on September 16.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Osumacinta are 16.936 deg latitude, -93.090 deg longitude, and 2,001 ft elevation.
The topography within 2 miles of Osumacinta contains large variations in elevation, with a maximum elevation change of 2,923 feet and an average elevation above sea level of 1,826 feet. Within 10 miles contains large variations in elevation (5,430 feet). Within 50 miles also contains extreme variations in elevation (9,449 feet).
The area within 2 miles of Osumacinta is covered by cropland (79%) and water (16%), within 10 miles by cropland (63%) and trees (21%), and within 50 miles by cropland (63%) and trees (31%).
This report illustrates the typical weather in Osumacinta year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Osumacinta.
For each station, the records are corrected for the elevation difference between that station and Osumacinta according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Osumacinta is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Osumacinta and a given station.
The stations contributing to this reconstruction are: General Div P A Angel H Corzo Molina (93%, 24 kilometers, south) and Carlos Rovirosa Pérez International Airport (7%, 120 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .