SeasonMapCastro weather in September
Chile
September in Castro: cold, rainy, with clean air — a good time to visit.
#8 of 12 months in Castro · #1016 of 1383 destinations to visit in September · comfort 65/100 (tier C)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Castro in September
No notes yet. Open Castro on the map to add the first one.
Castro climate normals — September
| Daytime high | 12°C / 54°F | 🧥 cold |
|---|---|---|
| Nighttime low | 5°C / 41°F | |
| Feels like (high) | 9°C / 48°F | |
| Sea temperature | 10°C / 49°F | 🥶 cold sea |
| Rainfall | 141 mm / 5.6 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 84% | 💦 very humid |
| Dew point | 6°C / 42°F | |
| Sunshine | 7.7 h/day | |
| Daylight | 11.8 h | |
| Wind | 16 km/h / 10 mph | |
| Snowfall | 0.6 cm / 0.2 in | |
| Air quality (US AQI) | 28 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Castro 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.
BusyFiestas Patrias recess in Chile(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Castro'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 weatherCastro's weather peaks December–February.
Best weatherFair weatherToughest weather
What's on in Castro in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Winter shutdown
1 May – 15 Sep · usuallyOff-season shutdownClosuresThe rain is near-constant from May, the excursion boats stop and a fair share of the waterfront closes. What stays open is serving the island rather than visitors, and it costs half as much.
Nearby, and something's on
Within 300 km of Castro — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Castro?
Castro in September — FAQ
- Is September a good time to visit Castro?
- September in Castro: cold, rainy, with clean air — a good time to visit. It ranks #8 of 12 months for Castro on SeasonMap's comfort score (65/100).
- What is the weather like in Castro in September?
- In September, Castro averages a daily high of 12°C and a low of 5.1°C, with about 141.3 mm of rain over roughly 17.1 rainy days.
- What is the air quality in Castro in September?
- Castro has a mean US Air Quality Index of about 28 in September.
Other months in Castro
Compare Castro in September
Warmer or cooler than Castro in September
Similar destinations in South America — September
Within 300 km: San Carlos de Bariloche's Ski season around 29 Jun – 4 Oct.