San Luis in Spring
In spring (September, October and November), San Luis sees average daytime highs around 24°C and overnight lows near 12°C, with 185 mm of rain over about 25 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs climb from about 20°C in early September to 27°C by late November. The sky is clear or mostly clear about 54% of the time across spring, and the air most often feels dry.
Spring is San Luis's best season of the year to visit on our travel score. For the whole year in context, see San Luis's year-round climate.
- Avg daytime high
- 24°C
- 2nd-warmest season
- Avg overnight low
- 12°C
- Rainfall
- 185 mm
- 25 wet days
- Avg wind
- 13 km/h
- Travel score
- 7.3
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in San Luis in Spring
Over the season highs climb from about 20°C in early September to 27°C by late November.
A typical spring day in San Luis reaches about 24°C and drops to 12°C overnight. The warmest of the three months is November, the coolest September.
San Luis weather by month
How the three spring months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 18° | 107 | 13.3 | 14 | 5.3 |
| Feb | 28° / 17° | 81 | 10.9 | 13.2 | 6.3 |
| Mar | 26° / 15° | 80 | 10.1 | 12.3 | 7.1 |
| Apr | 22° / 11° | 53 | 7 | 11.2 | 7.4 |
| May | 18° / 8° | 25 | 4.2 | 10.3 | 6.8 |
| Jun | 16° / 5° | 8 | 1.9 | 9.8 | 6.3 |
| Jul | 16° / 4° | 9 | 2.1 | 10 | 6.1 |
| Aug | 18° / 6° | 15 | 2.6 | 10.8 | 7.4 |
| Sep | 21° / 9° | 30 | 4.6 | 11.8 | 7.6 |
| Oct | 24° / 12° | 66 | 8.7 | 12.8 | 7.5 |
| Nov | 26° / 14° | 89 | 11.7 | 13.7 | 6.7 |
| Dec | 28° / 17° | 102 | 13.1 | 14.2 | 5.8 |
Cloud cover in Spring
The sky is clear or mostly clear about 54% of the time across spring.
Chance of precipitation in Spring
San Luis gets around 185 mm of rain over 25 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 13 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 18 min in early September to 14 hours by late November. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 6.2 kWh/m².
Hazard calendar for San Luis
In spring, San Luis overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
San Luis's rainy season runs October–April, when most of the year's rain falls.
Is spring a good time to visit San Luis?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is one of the better times to visit San Luis for general sightseeing.
What to pack for San Luis in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, San Luis sees daytime highs around 24°C and nights near 12°C. Pack sun protection. Worth having: light clothes and rain gear. About 25 days see rain.
UV index in San Luis in Spring
Clear-sky midday UV across spring averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Luis peaks around January 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 14 | 13 | 10 | 6 | 4 | 3 | 3 | 4 | 6 | 10 | 12 | 13 |
| Level | Extreme | Extreme | Extreme | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 10 | Extreme |
| Apr | 6 | High |
| May | 4 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 10 | Very high |
| Nov | 12 | Extreme |
| Dec | 13 | Extreme |
Where is San Luis?
San Luis sits at 33.3°S, 66.3°W, 729 m above sea level, in Argentina. The nearest listed city is Villa Mercedes, 91 km away.
Topography around San Luis
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Luis.
Within 3 km, the terrain around San Luis has only modest variations in elevation — a maximum elevation change of 121 m around an average of 743 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,416 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,820 m.
The land around San Luis is covered by artificial surfaces (72%) within 3 km, shrubs (50%) and grassland (24%) within 16 km, and shrubs (59%) and grassland (22%) within 80 km.
Argentina travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / I
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $14,898
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Homicide rate
- 4.5
- per 100k, 2023
- Road deaths
- 14.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 575
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for San Luis (-33.2914°, -66.3247°, elevation 729 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.