Average Weather in September in Patarrá Costa Rica
Daily high temperatures are around 76°F, rarely falling below 72°F or exceeding 79°F.
Daily low temperatures are around 62°F, rarely falling below 60°F or exceeding 65°F.
For reference, on April 10, the hottest day of the year, temperatures in Patarrá typically range from 63°F to 79°F, while on September 19, the coldest day of the year, they range from 62°F to 76°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 Patarrá experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 94% throughout the month.
The clearest day of the month is September 13, with clear, mostly clear, or partly cloudy conditions 6% of the time.
For reference, on June 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 96%, while on January 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 63%.
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 Patarrá, the chance of a wet day over the course of September is gradually increasing, starting the month at 48% and ending it at 50%.
For reference, the year's highest daily chance of a wet day is 52% on October 7, and its lowest chance is 7% on March 16.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Patarrá is increasing, starting the month at 5.9 inches, when it rarely exceeds 10.3 inches or falls below 2.2 inches, and ending the month at 6.4 inches, when it rarely exceeds 11.8 inches or falls below 2.5 inches.
Average Monthly Rainfall in September
Over the course of September in Patarrá, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 16 minutes, implying an average daily decrease of 32 seconds, and weekly decrease of 3 minutes, 46 seconds.
The shortest day of the month is September 30, with 12 hours, 2 minutes of daylight and the longest day is September 1, with 12 hours, 18 minutes of daylight.
Hours of Daylight and Twilight in September
The latest sunrise of the month in Patarrá is 5:26 AM on September 1 and the earliest sunrise is 2 minutes, 13 seconds earlier at 5:24 AM on September 30.
The latest sunset is 5:45 PM on September 1 and the earliest sunset is 18 minutes earlier at 5:27 PM on September 30.
Daylight saving time is not observed in Patarrá during 2018.
For reference, on June 21, the longest day of the year, the Sun rises at 5:16 AM and sets 12 hours, 42 minutes later, at 5:59 PM, while on December 21, the shortest day of the year, it rises at 5:47 AM and sets 11 hours, 33 minutes later, at 5:20 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Patarrá is increasing during September, rising from 40% to 46% over the course of the month.
The highest chance of a muggy day during September is 46% on September 28.
For reference, on June 2, the muggiest day of the year, there are muggy conditions 50% of the time, while on January 24, the least muggy day of the year, there are muggy conditions 3% 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 Patarrá is essentially constant during September, remaining within 0.1 miles per hour of 1.9 miles per hour throughout.
For reference, on February 5, the windiest day of the year, the daily average wind speed is 3.2 miles per hour, while on June 14, the calmest day of the year, the daily average wind speed is 1.7 miles per hour.
Average Wind Speed in September
Wind Direction in September
Patarrá 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 Patarrá is essentially constant during September, remaining around 83°F throughout.
Average Water Temperature in September
Temperatures in Patarrá 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 Patarrá are rapidly increasing during September, increasing by 500°F, from 4,504°F to 5,004°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Patarrá is essentially constant during September, remaining within 0.1 kWh of 3.9 kWh throughout.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Patarrá are 9.881 deg latitude, -84.035 deg longitude, and 4,150 ft elevation.
The topography within 2 miles of Patarrá contains very significant variations in elevation, with a maximum elevation change of 1,640 feet and an average elevation above sea level of 4,193 feet. Within 10 miles contains very significant variations in elevation (5,801 feet). Within 50 miles also contains extreme variations in elevation (12,490 feet).
The area within 2 miles of Patarrá is covered by grassland (45%), trees (38%), and cropland (14%), within 10 miles by trees (44%) and grassland (38%), and within 50 miles by trees (53%) and grassland (17%).
This report illustrates the typical weather in Patarrá 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 is only a single weather station, Juan Santamaría International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Patarrá.
At a distance of 23 kilometers from Patarrá, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and Patarrá according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
Time zones for aiports and weather stations are provided by AskGeo.com .