The best times to visit San Luis for ideal weather are

February 19th to May 27th

or

August 20th to November 25th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other San Luis Travel Info

Weather in San Luis

Temperature

Average temperatures in San Luis vary greatly. Considering humidity, temperatures feel nice most of the year, excluding some cold weeks in the winter, with a low chance of precipitation most of the year. The area is somewhat temperate — in the 48th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit San Luis, the hottest months are January, December, and then February. See average monthly temperatures below. The warmest time of year is generally early to mid January where highs are regularly around 91.9°F (33.3°C) with temperatures rarely dropping below 66.4°F (19.1°C) at night.

San Luis Temperatures (Fahrenheit)

Key
High
Average
Low

San Luis Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

San Luis Perceived Temperature (F)

Key
High
Average
Low

San Luis Perceived Temperature (C)

Key
High
Average
Low

 

Average San Luis Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 90.7 78 65.5
Feb 86.1 74.1 63
Mar 82.7 70.7 59.6
Apr 76.2 64.5 53.8
May 69.1 57.1 46.2
Jun 65.5 52.1 40.3
Jul 64.5 50.7 38.5
Aug 68 54.5 42.2
Sep 73.1 60 48.5
Oct 79.9 66.3 54.6
Nov 84.8 71.5 59.3
Dec 89.2 76 63.7

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 32.6 25.6 18.6
Feb 30.1 23.4 17.2
Mar 28.2 21.5 15.3
Apr 24.6 18.1 12.1
May 20.6 13.9 7.9
Jun 18.6 11.2 4.6
Jul 18.1 10.4 3.6
Aug 20 12.5 5.7
Sep 22.8 15.6 9.2
Oct 26.6 19.1 12.6
Nov 29.3 21.9 15.2
Dec 31.8 24.4 17.6

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in San Luis are July, June, and then August. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid June. For example, on the week of June 18th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid February with an average of 3 days of significant precipitation the week of February 19th.

When can you find snow in San Luis? Weather stations report a very small amount of seasonal snow likely to be deepest around July, especially close to mid July. The best time to ski (if at all) in San Luis is often around around July 16th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in San Luis.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in San Luis (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 23% 0 6.6
Feb 29% 0 7.8
Mar 18% 0 4.6
Apr 10% 0 2.4
May 4% 0 1
Jun 2% 0 0.6
Jul 2% 0.4 0.5
Aug 3% 0 0.4
Sep 8% 0 1
Oct 14% 0 2.6
Nov 21% 0 6.3
Dec 22% 0 4.6

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 23 0 16.8
Feb 29 0 19.8
Mar 18 0 11.7
Apr 10 0 6.1
May 4 0 2.5
Jun 2 0 1.5
Jul 2 1 1.3
Aug 3 0 1
Sep 8 0 2.5
Oct 14 0 6.6
Nov 21 0 16
Dec 22 0 11.7

 

Humidity and Wind

San Luis has some comfortably humid months, and slightly dry months in the opposite season. The least humid month is August (34.1% relative humidity), and the most humid month is March (52.7%).

Wind in San Luis is usually moderate. The windiest month is October, followed by November and December. October’s average wind speed of around 10.6 knots (12.1 MPH or 19.5 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid December where average top sustained speeds reach 18.1 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in San Luis.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 9.7 Gentle breeze 16.5 Significant breeze
Feb 9 Gentle breeze 15.6 Significant breeze
Mar 8.2 Gentle breeze 14.1 Significant breeze
Apr 8 Gentle breeze 13.5 Significant breeze
May 7.2 Gentle breeze 12.6 Significant breeze
Jun 7.3 Gentle breeze 13.1 Significant breeze
Jul 8.1 Gentle breeze 14.3 Significant breeze
Aug 8.9 Gentle breeze 15.2 Significant breeze
Sep 9.4 Gentle breeze 16 Significant breeze
Oct 10.6 Gentle breeze 17.4 Strong breeze
Nov 10.2 Gentle breeze 16.7 Significant breeze
Dec 10 Gentle breeze 16.8 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 40.9%
Feb 52.5%
Mar 52.7%
Apr 51.3%
May 51.8%
Jun 43.6%
Jul 37.7%
Aug 34.1%
Sep 35.8%
Oct 39.2%
Nov 37.1%
Dec 38.6%

 

Is it Safe to Travel to San Luis?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for Argentina; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Nov 21, 2023.


 

The Busiest and Least Crowded Months

The busiest month for tourism in San Luis, Argentina is August, followed by October and July. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit San Luis in February. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 61.3 in February means 61.3% of the tourists vs. August.

 

 

Overall San Luis Travel Experience by Season

Fall (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 86.2°F (30.1°C) and 64.6°F (18.1°C) with colder temperatures in the later months. Rain is rare with 1 to 6 days of significant precipitation per month. Fall is the second busiest for tourism, which makes it a good time for those looking for things to do.

Winter (June through August)

The middle-year months have cold weather with high temperatures that are comfortable. These months see the least precipitation with 0 to 1 days of precipitation per month. June – August is the busiest season for tourism in San Luis, so lodging and other accommodations may cost more than usual.

Spring (September through November)

Spring daily highs range from 86.6°F (30.3°C) and 72.2°F (22.3°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 2 to 6 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Summer (December through February)

Weather is perfect this time of year in San Luis to be enjoyable for warm weather travelers. The average high during this season is between 91.9°F (33.3°C) and 82.7°F (28.2°C). On average, it rains or snows a fair amount: 7 to 8 times per month. These times of year are the slowest with tourists.

 

Best Times to Travel› Argentina › San Luis, Argentina