Average Weather in March in Atenas Costa Rica
In Atenas, the month of March is characterized by essentially constant daily high temperatures, with daily highs around 89°F throughout the month, rarely exceeding 92°F or dropping below 84°F. The highest daily average high temperature is 89°F on March 28.
Daily low temperatures are around 70°F, rarely falling below 66°F or exceeding 73°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 March
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. 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 March
The month of March in Atenas experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 45% to 58%.
The clearest day of the month is March 1, with clear, mostly clear, or partly cloudy conditions 55% 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 in March
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 March is gradually increasing, starting the month at 5% and ending it at 8%.
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 March
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 March in Atenas is gradually increasing, starting the month at 0.4 inches, when it rarely exceeds 1.3 inches or falls below -0.0 inches, and ending the month at 0.7 inches, when it rarely exceeds 1.6 inches.
Average Monthly Rainfall in March
Over the course of March 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 17 minutes, implying an average daily increase of 33 seconds, and weekly increase of 3 minutes, 51 seconds.
The shortest day of the month is March 1, with 11 hours, 56 minutes of daylight and the longest day is March 31, with 12 hours, 13 minutes of daylight.
Hours of Daylight and Twilight in March
The latest sunrise of the month in Atenas is 5:51 AM on March 1 and the earliest sunrise is 16 minutes earlier at 5:35 AM on March 31.
The earliest sunset is 5:48 PM on March 1 and the latest sunset is 23 seconds later at 5:48 PM on March 12.
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 March
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 Atenas is increasing during March, rising from 10% to 20% 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 March
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 Atenas is essentially constant during March, remaining within 0.2 miles per hour of 2.0 miles per hour throughout.
For reference, on February 25, the windiest day of the year, the daily average wind speed is 2.2 miles per hour, while on June 16, the calmest day of the year, the daily average wind speed is 1.3 miles per hour.
Average Wind Speed in March
Wind Direction in March
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 March, remaining around 84°F throughout.
Average Water Temperature in March
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 Atenas is essentially constant during March, remaining within 0.1 kWh of 6.8 kWh throughout.
The highest average daily incident shortwave solar energy during March is 6.9 kWh on March 21.
Average Daily Incident Shortwave Solar Energy in March
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.
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.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . 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.
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.