Average Weather in San Luis Mexico
In San Luis, the summers are short, warm, arid, and mostly clear and the winters are long, cool, and partly cloudy. Over the course of the year, the temperature typically varies from 46°F to 79°F and is rarely below 40°F or above 87°F.
Based on the tourism score, the best time of year to visit San Luis for warm-weather activities is from mid June to early October.
The warm season lasts for 2.8 months, from July 7 to October 1, with an average daily high temperature above 76°F. The hottest day of the year is August 25, with an average high of 79°F and low of 64°F.
The cool season lasts for 4.4 months, from November 28 to April 11, with an average daily high temperature below 68°F. The coldest day of the year is December 26, with an average low of 46°F and high of 65°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 Luis, 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 Luis begins around May 18 and lasts for 5.4 months, ending around November 1. On September 9, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 90% of the time, and overcast or mostly cloudy 10% of the time.
The cloudier part of the year begins around November 1 and lasts for 6.5 months, ending around May 18. On February 22, the cloudiest day of the year, the sky is overcast or mostly cloudy 44% of the time, and clear, mostly clear, or partly cloudy 56% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in San Luis varies throughout the year.
The wetter season lasts 4.6 months, from November 20 to April 6, with a greater than 10% chance of a given day being a wet day. The chance of a wet day peaks at 19% on February 13.
The drier season lasts 7.4 months, from April 6 to November 20. The smallest chance of a wet day is 0% on June 25.
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 19% on February 13.
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 Luis experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 5.6 months, from October 27 to April 16, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 22, with an average total accumulation of 2.0 inches.
The rainless period of the year lasts for 6.4 months, from April 16 to October 27. The least rain falls around June 19, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
The length of the day in San Luis varies significantly over the course of the year. In 2020, the shortest day is December 21, with 10 hours, 1 minute of daylight; the longest day is June 20, with 14 hours, 17 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:40 AM on June 11, and the latest sunrise is 1 hour, 26 minutes later at 7:06 AM on March 8. The earliest sunset is at 4:42 PM on December 3, and the latest sunset is 3 hours, 17 minutes later at 7:59 PM on June 29.
Daylight saving time (DST) is observed in San Luis during 2020, starting in the spring on March 8, lasting 7.8 months, and ending in the fall on November 1.
Sunrise & Sunset with Twilight and Daylight Saving Time
San Luis experiences some seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.2 months, from June 29 to October 3, during which time the comfort level is muggy, oppressive, or miserable at least 5% of the time. The muggiest day of the year is August 21, with muggy conditions 19% of the time.
The least muggy day of the year is February 16, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in San Luis experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 6.4 months, from November 11 to May 24, with average wind speeds of more than 7.1 miles per hour. The windiest day of the year is December 29, with an average hourly wind speed of 8.4 miles per hour.
The calmer time of year lasts for 5.6 months, from May 24 to November 11. The calmest day of the year is September 7, with an average hourly wind speed of 5.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in San Luis varies throughout the year.
The wind is most often from the west for 9.7 months, from February 1 to November 21, with a peak percentage of 72% on May 22. The wind is most often from the east for 2.3 months, from November 21 to February 1, with a peak percentage of 42% on January 1.
San Luis 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 water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 2.8 months, from July 14 to October 7, with an average temperature above 67°F. The day of the year with the warmest water is August 25, with an average temperature of 69°F.
The time of year with cooler water lasts for 4.3 months, from December 10 to April 21, with an average temperature below 61°F. The day of the year with the coolest water is February 8, with an average temperature of 59°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in San Luis 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 time of year to visit San Luis for general outdoor tourist activities is from mid June to early October, with a peak score in the second week of August.
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 Luis for hot-weather activities is from early August to mid September, with a peak score in the last week of August.
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.
Temperatures in San Luis are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season
Growing Degree Days
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.8 months, from April 24 to August 17, with an average daily incident shortwave energy per square meter above 7.4 kWh. The brightest day of the year is June 20, with an average of 8.4 kWh.
The darker period of the year lasts for 3.2 months, from November 5 to February 12, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest day of the year is December 21, with an average of 3.2 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of San Luis are 32.432 deg latitude, -116.954 deg longitude, and 853 ft elevation.
The topography within 2 miles of San Luis contains very significant variations in elevation, with a maximum elevation change of 1,004 feet and an average elevation above sea level of 817 feet. Within 10 miles contains very significant variations in elevation (2,844 feet). Within 50 miles contains large variations in elevation (6,483 feet).
The area within 2 miles of San Luis is covered by grassland (69%) and artificial surfaces (26%), within 10 miles by artificial surfaces (34%) and shrubs (31%), and within 50 miles by water (44%) and shrubs (38%).
This report illustrates the typical weather in San Luis, 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, General Abelardo L. Rodríguez International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of San Luis.
At a distance of 12 kilometers from San Luis, 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 Luis 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 .