SeasonMapLa Serena weather in September
Chile
September in La Serena: nice, dry, with clean air — an excellent time to visit.
#8 of 12 months in La Serena · #600 of 1383 destinations to visit in September · comfort 82/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on La Serena in September
Other months in La Serena
La Serena's forum is clear that hot February days don't mean warm water — regulars describe the sea as frigidly cold with powerful currents that keep most people out of it altogether, even at the height of Chilean summer. It's peak vacation season for Chileans too, so accommodation books up well ahead.
Add your own note from La Serena's card on the map.
La Serena climate normals — September
| Daytime high | 17°C / 63°F | 😎 nice |
|---|---|---|
| Nighttime low | 10°C / 50°F | |
| Feels like (high) | 17°C / 63°F | |
| Sea temperature | 14°C / 57°F | 🥶 cold sea |
| Rainfall | 1 mm / 0 in | ☀️ dry |
| Rainy days | 0 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 10°C / 49°F | |
| Sunshine | 10.3 h/day | |
| Daylight | 11.9 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 39 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in La Serena 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.
Peak crowdsLa Pampilla de Coquimbo, Fiestas Patrias recess in Chile(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for La Serena'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 weatherLa Serena's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in La Serena in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
New-moon nights in the Elqui
1 Jan – 31 DecDark-sky seasonBook earlyThe valley has clear skies most nights of the year, and the tourist observatories close for the few days either side of a full moon. Book a new-moon night and take a coat; it drops fast.
- Season
Camanchaca on the coast
1 May – 30 Sep · usuallyFog seasonRiskThe coastal fog sits over La Serena and Coquimbo for the cool half of the year, most of it burning off by late morning. Drive forty minutes inland and it is a different country.
- Festival
La Pampilla de Coquimbo
17–20 SepMajor festivalCrowdedChile's national days are spent on a hillside above Coquimbo, in a temporary town of tents, fondas and cueca that draws hundreds of thousands. Roads in from La Serena are shut or crawling. Source ↗
Where is La Serena?
La Serena in September — FAQ
- Is September a good time to visit La Serena?
- September in La Serena: nice, dry, with clean air — an excellent time to visit. It ranks #8 of 12 months for La Serena on SeasonMap's comfort score (82/100).
- What is the weather like in La Serena in September?
- In September, La Serena averages a daily high of 17.4°C and a low of 9.9°C, with about 0.6 mm of rain over roughly 0.2 rainy days.
- What is the air quality in La Serena in September?
- La Serena has a mean US Air Quality Index of about 39 in September.