SeasonMapSan Martín de los Andes weather in September
Argentina
September in San Martín de los Andes: cold, rainy, with clean air — a good time to visit.
#4 of 12 months in San Martín de los Andes · #990 of 1383 destinations to visit in September · comfort 67/100 (tier C)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on San Martín de los Andes in September
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San Martín de los Andes climate normals — September
| Daytime high | 10°C / 50°F | 🧥 cold |
|---|---|---|
| Nighttime low | 3°C / 38°F | |
| Feels like (high) | 7°C / 45°F | |
| Rainfall | 102 mm / 4 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 3°C / 37°F | |
| Sunshine | 9.7 h/day | |
| Daylight | 11.9 h | |
| Wind | 14 km/h / 9 mph | |
| Snowfall | 50.9 cm / 20 in | |
| Air quality (US AQI) | 29 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in San Martín de los Andes in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 2 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for San Martín de los Andes's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherSan Martín de los Andes's weather peaks June–August.
Best weatherFair weatherToughest weather
What's on in San Martín de los Andes in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Chapelco ski season
25 Jun – 30 Sep · usuallyThe hill is twenty minutes out of town and usually turns the lifts on at the start of July, holding until late September. Low snow years open the base only, and the town says so plainly.
- Season
Snow season
Ski seasonAbout 51 cm of snow falls in the month.
from the climate normals
Nearby, and something's on
Within 300 km of San Martín de los Andes — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is San Martín de los Andes?
San Martín de los Andes in September — FAQ
- Is September a good time to visit San Martín de los Andes?
- September in San Martín de los Andes: cold, rainy, with clean air — a good time to visit. It ranks #4 of 12 months for San Martín de los Andes on SeasonMap's comfort score (67/100).
- What is the weather like in San Martín de los Andes in September?
- In September, San Martín de los Andes averages a daily high of 9.9°C and a low of 3.1°C, with about 101.7 mm of rain over roughly 11.5 rainy days.
- What is the air quality in San Martín de los Andes in September?
- San Martín de los Andes has a mean US Air Quality Index of about 29 in September.
- Does it snow in San Martín de los Andes in September?
- San Martín de los Andes sees roughly 50.9 cm of snowfall in September.
Other months in San Martín de los Andes
Compare San Martín de los Andes in September
Warmer or cooler than San Martín de los Andes in September
Similar destinations in South America — September
Within 300 km: San Carlos de Bariloche's Ski season around 29 Jun – 4 Oct.