Average Weather in February in San Francisco Costa Rica
In San Francisco, the month of February is characterized by essentially constant daily high temperatures, with daily highs around 80°F throughout the month, rarely exceeding 84°F or dropping below 76°F.
Daily low temperatures are around 64°F, rarely falling below 61°F or exceeding 67°F.
For reference, on April 7, the hottest day of the year, temperatures in San Francisco typically range from 65°F to 82°F, while on September 21, the coldest day of the year, they range from 64°F to 78°F.
Average High and Low Temperature in February
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on February. 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 February
The month of February in San Francisco experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 41% to 46%.
The clearest day of the month is February 3, with clear, mostly clear, or partly cloudy conditions 59% 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 February
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San Francisco, the chance of a wet day over the course of February is essentially constant, remaining around 8% throughout.
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 February
The average sliding 31-day rainfall during February in San Francisco is essentially constant, remaining about 0.7 inches throughout, and rarely exceeding 2.1 inches or falling below -0.0 inches.
Average Monthly Rainfall in February
Over the course of February in San Francisco, the length of the day is essentially constant. The shortest day of the month is February 1, with 11 hours, 43 minutes of daylight and the longest day is February 28, with 11 hours, 56 minutes of daylight.
Hours of Daylight and Twilight in February
The latest sunrise of the month in San Francisco is 5:58 AM on February 1 and the earliest sunrise is 8 minutes earlier at 5:51 AM on February 28.
The earliest sunset is 5:41 PM on February 1 and the latest sunset is 5 minutes later at 5:46 PM on February 28.
Daylight saving time is not observed in San Francisco during 2017.
For reference, on June 21, the longest day of the year, the Sun rises at 5:17 AM and sets 12 hours, 43 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 February
The chance that a given day will be muggy in San Francisco is gradually increasing during February, rising from 3% to 6% over the course of the month.
For reference, on June 4, the muggiest day of the year, there are muggy conditions 60% 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 February
The average hourly wind speed in San Francisco is essentially constant during February, remaining around 4.0 miles per hour throughout.
For reference, on February 5, the windiest day of the year, the daily average wind speed is 4.0 miles per hour, while on September 18, the calmest day of the year, the daily average wind speed is 1.9 miles per hour.
The highest daily average wind speed during February is 4.0 miles per hour on February 5.
Average Wind Speed in February
Wind Direction in February
San Francisco 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 Francisco is essentially constant during February, remaining around 83°F throughout.
Average Water Temperature in February
The average daily incident shortwave solar energy in San Francisco is essentially constant during February, remaining within 0.2 kWh of 6.4 kWh throughout.
Average Daily Incident Shortwave Solar Energy in February
For the purposes of this report, the geographical coordinates of San Francisco are 9.993 deg latitude, -84.129 deg longitude, and 3,583 ft elevation.
The topography within 2 miles of San Francisco contains very significant variations in elevation, with a maximum elevation change of 846 feet and an average elevation above sea level of 3,599 feet. Within 10 miles contains very significant variations in elevation (7,510 feet). Within 50 miles also contains extreme variations in elevation (11,447 feet).
The area within 2 miles of San Francisco is covered by grassland (71%) and trees (26%), within 10 miles by grassland (46%) and trees (39%), and within 50 miles by trees (54%) and grassland (17%).
This report illustrates the typical weather in San Francisco 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 Francisco.
At a distance of 9 kilometers from San Francisco, 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 Francisco 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 .