Average Weather in April in Atenas Costa Rica
In Atenas, the month of April is characterized by essentially constant daily high temperatures, with daily highs around 88°F throughout the month, rarely exceeding 92°F or dropping below 83°F.
Daily low temperatures are around 71°F, rarely falling below 67°F or exceeding 74°F.
For reference, on March 24, the hottest day of the year, temperatures in Atenas typically range from 70°F to 89°F, while on October 1, the coldest day of the year, they range from 68°F to 82°F.
Average High and Low Temperature in April
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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 April
The month of April in Atenas experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 59% to 84%.
The clearest day of the month is April 1, with clear, mostly clear, or partly cloudy conditions 41% of the time.
For reference, on June 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 94%, while on January 1, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 65%.
Cloud Cover Categories in April
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Atenas, the chance of a wet day over the course of April is very rapidly increasing, starting the month at 8% and ending it at 23%.
For reference, the year's highest daily chance of a wet day is 50% on October 7, and its lowest chance is 4% on January 26.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Atenas is very rapidly increasing, starting the month at 0.7 inches, when it rarely exceeds 1.7 inches, and ending the month at 2.7 inches, when it rarely exceeds 5.4 inches or falls below 0.7 inches.
Average Monthly Rainfall in April
Over the course of April in Atenas, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 15 minutes, implying an average daily increase of 31 seconds, and weekly increase of 3 minutes, 39 seconds.
The shortest day of the month is April 1, with 12 hours, 13 minutes of daylight and the longest day is April 30, with 12 hours, 29 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Atenas is 5:34 AM on April 1 and the earliest sunrise is 14 minutes earlier at 5:20 AM on April 30.
The earliest sunset is 5:47 PM on April 10 and the latest sunset is 1 minute, 4 seconds later at 5:49 PM on April 30.
Daylight saving time is not observed in Atenas during 2017.
For reference, on June 21, the longest day of the year, the Sun rises at 5:18 AM and sets 12 hours, 43 minutes later, at 6:00 PM, while on December 21, the shortest day of the year, it rises at 5:49 AM and sets 11 hours, 33 minutes later, at 5:22 PM.
Sunrise & Sunset with Twilight in April
The chance that a given day will be muggy in Atenas is very rapidly increasing during April, rising from 20% to 48% over the course of the month.
For reference, on June 4, the muggiest day of the year, there are muggy conditions 86% of the time, while on February 2, the least muggy day of the year, there are muggy conditions 7% of the time.
Humidity Comfort Levels in April
The average hourly wind speed in Atenas is gradually decreasing during April, decreasing from 3.4 miles per hour to 2.8 miles per hour over the course of the month.
For reference, on February 25, the windiest day of the year, the daily average wind speed is 4.2 miles per hour, while on June 16, the calmest day of the year, the daily average wind speed is 2.4 miles per hour.
Average Wind Speed in April
Wind Direction in April
Atenas 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 Atenas is essentially constant during April, remaining around 85°F throughout.
The highest average surface water temperature during April is 85°F on April 18.
Average Water Temperature in April
The average daily incident shortwave solar energy in Atenas is decreasing during April, falling by 1.3 kWh, from 6.7 kWh to 5.4 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in April
For the purposes of this report, the geographical coordinates of Atenas are 9.975 deg latitude, -84.379 deg longitude, and 2,195 ft elevation.
The topography within 2 miles of Atenas contains very significant variations in elevation, with a maximum elevation change of 1,667 feet and an average elevation above sea level of 2,226 feet. Within 10 miles contains very significant variations in elevation (4,764 feet). Within 50 miles also contains extreme variations in elevation (11,283 feet).
The area within 2 miles of Atenas is covered by grassland (57%) and trees (34%), within 10 miles by grassland (45%) and trees (35%), and within 50 miles by trees (43%) and water (24%).
This report illustrates the typical weather in Atenas 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 Atenas.
At a distance of 19 kilometers from Atenas, 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 Atenas 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 .