Puerto Montt Weather in December
What's the weather like in Puerto Montt (Los Lagos) in December 2025?
The climate in Puerto Montt during December can be summarized as mild and a little damp.
December is in the summer in Puerto Montt and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 18°C (64°F), whilst at night 9°C (48°F) is normal.
| Daytime temperature | 17.7°C 63.9°F |
|---|---|
| Nightly temperature | 8.9°C 48°F |
| Average temperature | 13.3°C 55.9°F |
| Daily sunshine | 10.8 hrs |
| Avg rainfall | 95 mm 3.8 ins |
| Rainy days | 3 days |
| Sea temperature | 13.9°C 57.1°F |
| Humidity | 79% |
| Windspeed | 20.2kph 13 mph |
On average December is the 3rd driest month of the year in Puerto Montt with around 95mm 3.8 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.
On the flip side this corresponds to an average of 10.8 hours of sunshine per day.
December temperatures in Puerto Montt
December rainfall
December 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 Montt in December 2025.
Other monthly averages
Best places to visit in December
Puerto Montt weather stats
| Hottest month: | January | 18.6°C 65.5°F |
|---|---|---|
| Driest month: | January | 82mm 3.2ins |
| Sunniest month: | February | 10.2hrs |
| Coldest month: | July | 9.1°C 48.4°F |
| Wettest month: | May | 238mm 9.4ins |
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