Monthly climate guide
Puerto Montt weather in September
With highs near 12°C (54°F) and lows around 5°C (41°F), September feels cool in Puerto Montt. Rainfall averages about 87 mm (some rain) and the sky is often cloudy. Daytime highs are 2°C warmer than August and 2°C cooler than October.
What stands out in September
- September brings early spring to Puerto Montt — the seasons are reversed south of the equator.
- Puerto Montt is usually about 2°C warmer than Pucón, 260 km away, in September.
Avg high
12°C
54°F
Avg low
5°C
41°F
Rainfall
87 mm
some rain
Humidity
87%
relative
Sky
73%
cloud · often cloudy
Puerto Montt weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 20°C / 68°F | 10°C / 50°F | 44 mm | 81% | 50% |
| February | 20°C / 69°F | 10°C / 51°F | 53 mm | 80% | 51% |
| March | 19°C / 65°F | 9°C / 49°F | 71 mm | 81% | 57% |
| April | 16°C / 60°F | 8°C / 46°F | 104 mm | 85% | 67% |
| May | 13°C / 55°F | 7°C / 45°F | 145 mm | 89% | 78% |
| June | 10°C / 50°F | 5°C / 41°F | 176 mm | 91% | 77% |
| July | 10°C / 49°F | 4°C / 40°F | 159 mm | 91% | 78% |
| August | 11°C / 51°F | 5°C / 41°F | 158 mm | 90% | 80% |
| September | 12°C / 54°F | 5°C / 41°F | 87 mm | 87% | 73% |
| October | 14°C / 57°F | 6°C / 43°F | 78 mm | 85% | 71% |
| November | 16°C / 61°F | 8°C / 46°F | 59 mm | 83% | 68% |
| December | 18°C / 64°F | 9°C / 49°F | 58 mm | 81% | 61% |
What to pack for September
- A warm sweater or fleece for layering
- A mid-weight jacket
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Puerto Montt?
Compare the months in the chart above to find your ideal window.
Best time to visit Puerto Montt →Other Chile cities in September
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Puerto Montt weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/chile/puerto-montt/september
<a href="https://weathercompare.eu/weather/chile/puerto-montt/september">Puerto Montt weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/chile/puerto-montt" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Puerto Montt weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/chile/puerto-montt/september">Puerto Montt weather in September</a> – WeatherCompare</p>
Puerto Montt in September: quick answers
Is September a good time to visit Puerto Montt?
September is cool in Puerto Montt, with highs around 12°C. Better for museums and city walks than the beach, and usually quieter.
How warm is Puerto Montt in September?
Average highs are about 12°C (54°F) and average lows about 5°C (41°F), based on 10 years of daily data.
Does it rain a lot in Puerto Montt in September?
Puerto Montt typically gets around 87 mm of rain in September — some rain.
Figures are long-term averages for the area around Puerto Montt (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.