Average Weather in San Salvador Argentina
In San Salvador, the summers are hot, humid, and wet; the winters are cool; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 45°F to 90°F and is rarely below 34°F or above 98°F.
Based on the tourism score, the best times of year to visit San Salvador for warm-weather activities are from mid February to late April and from early October to late December.
The hot season lasts for 3.3 months, from November 30 to March 7, with an average daily high temperature above 84°F. The hottest day of the year is January 9, with an average high of 90°F and low of 68°F.
The cool season lasts for 3.0 months, from May 19 to August 21, with an average daily high temperature below 68°F. The coldest day of the year is July 19, with an average low of 45°F and high of 63°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, 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 San Salvador, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in San Salvador begins around August 30 and lasts for 8.1 months, ending around May 2. On March 18, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 73% of the time, and overcast or mostly cloudy 27% of the time.
The cloudier part of the year begins around May 2 and lasts for 3.9 months, ending around August 30. On June 13, the cloudiest day of the year, the sky is overcast or mostly cloudy 49% of the time, and clear, mostly clear, or partly cloudy 51% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in San Salvador varies throughout the year.
The wetter season lasts 7.0 months, from October 1 to May 1, with a greater than 27% chance of a given day being a wet day. The chance of a wet day peaks at 37% on February 11.
The drier season lasts 5.0 months, from May 1 to October 1. The smallest chance of a wet day is 17% on August 14.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 37% on February 11.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. San Salvador experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in San Salvador. The most rain falls during the 31 days centered around April 7, with an average total accumulation of 5.8 inches.
The least rain falls around July 27, with an average total accumulation of 1.9 inches.
Average Monthly Rainfall
The length of the day in San Salvador varies significantly over the course of the year. In 2018, the shortest day is June 21, with 10 hours, 5 minutes of daylight; the longest day is December 21, with 14 hours, 13 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:41 AM on December 4, and the latest sunrise is 2 hours, 13 minutes later at 7:54 AM on July 1. The earliest sunset is at 5:57 PM on June 11, and the latest sunset is 2 hours, 6 minutes later at 8:03 PM on January 8.
Daylight saving time (DST) is not observed in San Salvador during 2018.
Sunrise & Sunset with Twilight
San Salvador experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 6.1 months, from October 25 to April 29, during which time the comfort level is muggy, oppressive, or miserable at least 13% of the time. The muggiest day of the year is February 8, with muggy conditions 50% of the time.
The least muggy day of the year is August 5, with muggy conditions 1% of the time.
Humidity Comfort Levels
The average hourly wind speed in San Salvador experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 4.9 months, from July 15 to December 12, with average wind speeds of more than 8.8 miles per hour. The windiest day of the year is September 13, with an average hourly wind speed of 9.8 miles per hour.
The calmer time of year lasts for 7.1 months, from December 12 to July 15. The calmest day of the year is May 6, with an average hourly wind speed of 7.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in San Salvador varies throughout the year.
The wind is most often from the north for 2.6 months, from May 8 to July 27, with a peak percentage of 34% on May 30. The wind is most often from the south for 2.9 weeks, from July 27 to August 16, with a peak percentage of 32% on August 13. The wind is most often from the east for 8.7 months, from August 16 to May 8, with a peak percentage of 47% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in San Salvador throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit San Salvador for general outdoor tourist activities are from mid February to late April and from early October to late December, with a peak score in the third week of November.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit San Salvador for hot-weather activities is from late November to mid March, with a peak score in the second week of January.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
The growing season in San Salvador typically lasts for 11 months (347 days), from around July 20 to around July 2, rarely starting after August 14, or ending before June 4.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in San Salvador should appear around July 16, only rarely appearing before July 11 or after July 26.
Growing Degree Days
The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.
The brighter period of the year lasts for 3.5 months, from October 30 to February 12, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest day of the year is January 6, with an average of 7.7 kWh.
The darker period of the year lasts for 3.3 months, from May 3 to August 12, with an average daily incident shortwave energy per square meter below 3.8 kWh. The darkest day of the year is June 20, with an average of 2.8 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of San Salvador are -31.625 deg latitude, -58.505 deg longitude, and 217 ft elevation.
The topography within 2 miles of San Salvador is essentially flat, with a maximum elevation change of 69 feet and an average elevation above sea level of 218 feet. Within 10 miles is essentially flat (164 feet). Within 50 miles also contains only modest variations in elevation (456 feet).
The area within 2 miles of San Salvador is covered by cropland (27%), grassland (27%), shrubs (25%), and trees (20%), within 10 miles by cropland (32%) and shrubs (26%), and within 50 miles by cropland (29%) and grassland (25%).
This report illustrates the typical weather in San Salvador, 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 are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in San Salvador.
For each station, the records are corrected for the elevation difference between that station and San Salvador according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at San Salvador is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Salvador and a given station.
The stations contributing to this reconstruction are: Aeropuerto Nueva Hesperides (63%, 54 kilometers, northeast); Paysandú Airport (28%, 92 kilometers, southeast); and Parana Airport (10%, 188 kilometers, west).
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.
Time zones for aiports and weather stations are provided by AskGeo.com .