Puerto Aisén Weather in September
What's the weather like in Puerto Aisén (Aisén) in September 2025?
The climate in Puerto Aisén during September can be summarized as cool and wet.
September is in the spring in Puerto Aisén and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a cool 10°C (49°F), whilst at night 2°C (36°F) is normal.
| Daytime temperature | 9.6°C 49.3°F |
|---|---|
| Nightly temperature | 2°C 35.6°F |
| Average temperature | 5.8°C 42.4°F |
| Daily sunshine | 6.6 hrs |
| Avg rainfall | 172 mm 6.8 ins |
| Rainy days | 6 days |
| Sea temperature | 9.7°C 49.4°F |
| Humidity | 83% |
| Windspeed | 18.7kph 12 mph |
On average September is the 6th wettest month of the year in Puerto Aisén with around 172mm 6.8 inches of rain making it a wet time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.6 hours of sunshine per day.
September temperatures in Puerto Aisén
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Puerto Aisén in September 2025.
Other monthly averages
Best places to visit in September
Puerto Aisén weather stats
| Hottest month: | January | 16.4°C 61.5°F |
|---|---|---|
| Driest month: | February | 130mm 5.1ins |
| Sunniest month: | February | 9.1hrs |
| Coldest month: | July | 5.3°C 41.5°F |
| Wettest month: | May | 272mm 10.7ins |
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