Average Weather in August in San Rafael Costa Rica
In San Rafael, the month of August is characterized by essentially constant daily high temperatures, with daily highs around 78°F throughout the month, rarely exceeding 82°F or dropping below 75°F. The highest daily average high temperature is 78°F on August 5.
Daily low temperatures are around 65°F, rarely falling below 62°F or exceeding 68°F.
For reference, on April 3, the hottest day of the year, temperatures in San Rafael typically range from 65°F to 82°F, while on September 19, the coldest day of the year, they range from 64°F to 78°F.
Average High and Low Temperature in August
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. 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 August
The month of August in San Rafael experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 93% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 92% on August 2.
The clearest day of the month is August 2, with clear, mostly clear, or partly cloudy conditions 8% of the time.
For reference, on June 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 95%, while on January 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.
Cloud Cover Categories in August
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San Rafael, the chance of a wet day over the course of August is very rapidly increasing, starting the month at 38% and ending it at 46%.
For reference, the year's highest daily chance of a wet day is 51% on October 7, and its lowest chance is 6% on March 16.
Probability of Precipitation in August
The average sliding 31-day rainfall during August in San Rafael is rapidly increasing, starting the month at 4.6 inches, when it rarely exceeds 8.9 inches or falls below 2.0 inches, and ending the month at 5.8 inches, when it rarely exceeds 10.3 inches or falls below 2.1 inches.
Average Monthly Rainfall in August
Over the course of August in San Rafael, the length of the day is essentially constant. The shortest day of the month is August 31, with 12 hours, 19 minutes of daylight and the longest day is August 1, with 12 hours, 33 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in San Rafael is 5:26 AM on August 1 and the latest sunrise is 1 minute, 21 seconds later at 5:27 AM on August 20.
The latest sunset is 5:59 PM on August 1 and the earliest sunset is 13 minutes earlier at 5:45 PM on August 31.
Daylight saving time is not observed in San Rafael during 2017.
For reference, on June 21, the longest day of the year, the Sun rises at 5:17 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 5:48 AM and sets 11 hours, 33 minutes later, at 5:21 PM.
Sunrise & Sunset with Twilight in August
The chance that a given day will be muggy in San Rafael is rapidly increasing during August, rising from 42% to 53% over the course of the month.
For reference, on June 2, the muggiest day of the year, there are muggy conditions 63% 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 August
The average hourly wind speed in San Rafael is essentially constant during August, remaining around 2.0 miles per hour throughout.
For reference, on February 10, the windiest day of the year, the daily average wind speed is 3.5 miles per hour, while on June 14, the calmest day of the year, the daily average wind speed is 1.9 miles per hour.
The lowest daily average wind speed during August is 1.9 miles per hour on August 24.
Average Wind Speed in August
Wind Direction in August
San Rafael 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 San Rafael is essentially constant during August, remaining around 83°F throughout.
Average Water Temperature in August
The average daily incident shortwave solar energy in San Rafael is essentially constant during August, remaining around 4.1 kWh throughout.
The highest average daily incident shortwave solar energy during August is 4.1 kWh on August 6.
Average Daily Incident Shortwave Solar Energy in August
For the purposes of this report, the geographical coordinates of San Rafael are 9.928 deg latitude, -84.137 deg longitude, and 3,599 ft elevation.
The topography within 2 miles of San Rafael contains very significant variations in elevation, with a maximum elevation change of 1,719 feet and an average elevation above sea level of 3,643 feet. Within 10 miles contains very significant variations in elevation (6,138 feet). Within 50 miles also contains extreme variations in elevation (11,447 feet).
The area within 2 miles of San Rafael is covered by grassland (60%), artificial surfaces (21%), and trees (14%), within 10 miles by grassland (48%) and trees (37%), and within 50 miles by trees (50%) and water (18%).
This report illustrates the typical weather in San Rafael 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 San Rafael.
At a distance of 11 kilometers from San Rafael, 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 San Rafael 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 .