Average Weather in September in Río Cañas Abajo Puerto Rico
Daily high temperatures are around 89°F, rarely falling below 87°F or exceeding 92°F.
Daily low temperatures are around 74°F, rarely falling below 71°F or exceeding 77°F.
For reference, on August 7, the hottest day of the year, temperatures in Río Cañas Abajo typically range from 74°F to 90°F, while on January 22, the coldest day of the year, they range from 67°F to 85°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 Río Cañas Abajo experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 70% throughout the month. The highest chance of overcast or mostly cloudy conditions is 72% on September 27.
The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 32% of the time.
For reference, on May 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 74%, while on January 11, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.
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 Río Cañas Abajo, the chance of a wet day over the course of September is gradually increasing, starting the month at 31% and ending it at 33%.
For reference, the year's highest daily chance of a wet day is 35% on November 1, and its lowest chance is 13% on March 9.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Río Cañas Abajo is essentially constant, remaining about 3.1 inches throughout, and rarely exceeding 6.5 inches or falling below 0.7 inches.
Average Monthly Rainfall in September
Over the course of September in Río Cañas Abajo, 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, 0 seconds, and weekly decrease of 7 minutes, 2 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
The earliest sunrise of the month in Río Cañas Abajo is 6:11 AM on September 1 and the latest sunrise is 5 minutes later at 6:16 AM on September 30.
The latest sunset is 6:39 PM on September 1 and the earliest sunset is 25 minutes earlier at 6:15 PM on September 30.
Daylight saving time is not observed in Río Cañas Abajo during 2021.
For reference, on June 21, the longest day of the year, the Sun rises at 5:51 AM and sets 13 hours, 13 minutes later, at 7:04 PM, while on December 21, the shortest day of the year, it rises at 6:52 AM and sets 11 hours, 3 minutes later, at 5:55 PM.
Sunrise & Sunset with Twilight in September
The figure below presents a compact representation of key lunar data for September 2021. 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.
Moon Rise, Set & Phases in September
The chance that a given day will be muggy in Río Cañas Abajo is essentially constant during September, remaining around 99% throughout.
For reference, on August 22, the muggiest day of the year, there are muggy conditions 99% of the time, while on February 28, the least muggy day of the year, there are muggy conditions 60% 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 Río Cañas Abajo is decreasing during September, decreasing from 10.5 miles per hour to 9.2 miles per hour over the course of the month.
For reference, on July 13, the windiest day of the year, the daily average wind speed is 12.3 miles per hour, while on October 10, the calmest day of the year, the daily average wind speed is 8.9 miles per hour.
Average Wind Speed in September
The hourly average wind direction in Río Cañas Abajo throughout September is predominantly from the east, with a peak proportion of 89% on September 1.
Wind Direction in September
Río Cañas Abajo 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 Río Cañas Abajo is essentially constant during September, remaining around 84°F throughout.
The highest average surface water temperature during September is 84°F on September 27.
Average Water Temperature in September
Temperatures in Río Cañas Abajo 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 Río Cañas Abajo are rapidly increasing during September, increasing by 871°F, from 6,898°F to 7,769°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Río Cañas Abajo is gradually decreasing during September, falling by 0.6 kWh, from 5.3 kWh to 4.7 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Río Cañas Abajo are 18.038 deg latitude, -66.468 deg longitude, and 236 ft elevation.
The topography within 2 miles of Río Cañas Abajo contains very significant variations in elevation, with a maximum elevation change of 961 feet and an average elevation above sea level of 340 feet. Within 10 miles contains very significant variations in elevation (3,983 feet). Within 50 miles also contains extreme variations in elevation (4,442 feet).
The area within 2 miles of Río Cañas Abajo is covered by grassland (42%), trees (33%), and cropland (15%), within 10 miles by trees (34%) and grassland (27%), and within 50 miles by water (66%) and trees (18%).
This report illustrates the typical weather in Río Cañas Abajo, 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 Río Cañas Abajo.
For each station, the records are corrected for the elevation difference between that station and Río Cañas Abajo 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 Río Cañas Abajo is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Río Cañas Abajo and a given station.
Time zones for airports and weather stations are provided by AskGeo.com .