Puerto Aisén Weather in September
Thinking of visiting Puerto Aisén in September? Expect low temperatures reaching 8°C (46°F) during the day, dropping to 0°C (32°F) at night. Heavy showers are common during the rainy season.
Rainfall in Puerto Aisén in September
As part of the rainy season, Puerto Aisén sees around 6 days of rain in September, with an average of 278 mm (11 in). The rain this month falls heavily when it arrives, so waterproofs are worth keeping handy.
Temperature in Puerto Aisén in September
In September, Puerto Aisén gets low temperatures, with highs of 8°C (46°F). Nights cool to around 0°C (32°F). Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. Nights are well below freezing at 0°C (32°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation.To explore more travel options, our weather planner can help you discover destinations worldwide.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Chile, check out our Puerto Aisén's climate page.
Puerto Aisén Temperature in September
Min Temperature
0°C (32°F)
Max Temperature
8°C (46°F)
Chance of Rain
18%
Precipitation
278 mm (11 in)
Rainy days
6 days
Humidity
80% *
Daily Historical Temperatures
43-year average (1976-2025)
Based on our historical records, temperatures in Puerto Aisén typically stay consistent throughout September, with daily highs averaging around 8°C (46°F). Nights are cold, with lows typically ranging from 1°C (34°F) to 4°C (39°F).
Average temperatures in September
Historical weather for Puerto Aisén in September
Browse day-by-day weather records for Puerto Aisén spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Puerto Aisén historical weather extremes in September
Based on 19 years of weather observations in Puerto Aisén between 2006 and 2025, these are the recorded extremes.
- The hottest September day on record in Puerto Aisén reached 21°C (70°F) (September 25, 2012).
- The lowest daytime temperature in September was 3°C (37°F), recorded on September 5, 2019.
- Puerto Aisén registered its coldest September night on September 3, 2006, with temperatures dropping to -6°C (21°F).
- The heaviest September precipitation occurred on September 27, 2025, when 51 mm (2 in) of precipitation fell.
Best Places in Chile in September
Find out more about the weather in Chile and which places have the best travel conditions in this month. See all of Chile in September →
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What to Wear in Puerto Aisén in September
We recommend to layer up for chilly conditions in Puerto Aisén in September. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. Also bring a poncho, it will rain a lot! Waterproof everything you can.What To Do in Puerto Aisén in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Chile, check out our Puerto Aisén's climate page.
See the full Puerto Aisén climate overview or explore weather in Chile.
