Weather in San Luis

Find out what weather awaits you in the city of San Luis right now to better plan your time. Below you will find the latest meteorological updates, detailed forecasts, and clear charts.

The climate in the city of San Luis can be characterized as temperate with semi-arid features. The weather here is distinguished by distinct seasonality, making the region attractive to visit at any time of year, depending on your goals. Overall, the city is characterized by significant temperature fluctuations between seasons, as well as a noticeable difference between daytime warmth and nighttime coolness.

Summer, which in Argentina lasts from December to February, is hot here: average daytime temperatures often rise above 30°C. This is also the wettest time of the year, when the number of rainy days increases, bringing brief freshness. Winter (June–August), conversely, is cool and very dry. During the day, the air warms up to 11–16°C, but nights can be quite cold, with temperatures dropping to 5°C.

A characteristic feature of the local climate is low rainfall during the winter period and early spring, when rain is practically absent. The transitional seasons — spring and autumn — delight tourists with mild and comfortable weather, perfectly suitable for long walks and sightseeing without exhausting heat or winter chill.

The climate in San Luis is distinguished by distinct seasonality, which is typical for this part of Argentina. The hottest period falls during the Southern Hemisphere summer months — from December to February. At this time, the average daytime temperature often exceeds 30°C, peaking in January with figures around 31.5°C. Despite the daytime heat, nights bring pleasant coolness when the air cools down to a comfortable 19-20°C, allowing for rest from the active sun.

Winter, which lasts from June to August, is quite mild here but requires warm clothing. July is considered the coldest month of the year: the average temperature drops to 10.7°C. During night hours, the thermometer can fall to 4-5°C, creating noticeable freshness; however, during the day the air usually warms up to 16-17°C. Such temperature conditions make winter walks around the city quite comfortable if your wardrobe is chosen correctly.

An important feature of San Luis's temperature regime is the significant daily fluctuations. The difference between the daily maximum and nightly minimum throughout the year averages 11-13 degrees. Even in transitional seasons — spring and autumn, when pleasant warmth reigns during the day (from 23°C to 28°C) — evenings can be cool. Travellers are recommended to consider this factor and carry items that can be thrown on after sunset.

Precipitation patterns in San Luis have distinct seasonality, typical for this region of Argentina. The year here is clearly divided into a wet warm season and a dry cool period. The majority of rain falls in summer (from December to February) and early autumn. The rainiest month is January, when about 12 days with precipitation are recorded. Summer thunderstorms and downpours happen often at this time, bringing relief from the heat.

Winter months, on the contrary, are distinguished by exceptional dryness. From June to September, the probability of getting caught in rain is minimal: statistics show that there are only 1–2 rainy days per month during this period, and precipitation volume tends toward zero. August is considered the driest month, when the sky remains clear almost constantly. Snow falls extremely rarely in the city itself, despite cool winter nights.

Transitional seasons — spring and autumn — demonstrate a gradual change in weather. In April, the number of wet days begins to decrease, preparing the city for a dry winter, and from October, the frequency of rains grows again, peaking by the end of the year. Travellers should take into account that in summer an umbrella will be a necessary accessory, whereas in winter precipitation need not be feared.

When planning a trip to San Luis, it is worth considering the distinct seasonality and noticeable daily temperature drop. In summer (from December to February), it is hot here; during the day, the air often warms up to 30°C and above, however, it is during this period that the probability of precipitation is maximal. We recommend bringing light clothing made from natural fabrics, but be sure to grab a raincoat or compact umbrella, as well as a light sweater for cool evenings.

Winter months (from June to August) are characterized by dry but cool weather, when night temperatures can drop to 5°C. For a trip at this time of year, the principle of layering is ideal: a combination of t-shirts, warm sweaters, and a thick jacket will allow you to feel comfortable. Since the region can be windy, windproof outerwear will be an excellent choice for autumn and winter.

Regardless of the visit date, be sure to pack comfortable shoes with flat soles for long walks around the city and surroundings. Also, do not neglect protection against ultraviolet radiation: high-quality sunscreen, a hat, and sunglasses will come in handy all year round, as the sun in this part of Argentina can be active even on cool days.