Puerto Montt in September
In September, Puerto Montt averages 12°C (53°F) during the day and 6°C (42°F) at night, with frequent rain — about 22 days of the month see precipitation (169 mm total).
ShoulderConditions are cool — bring a jacket for evenings. Expect daily rain or showers, often in heavy bursts.
September is one of the wetter and less comfortable months in Puerto Montt. If your dates are flexible, consider a different time of year.
How September compares to the rest of the year in Puerto Montt
September is in the middle of the year for warmth in Puerto Montt (9th of 12) and moderately rainy compared to the rest of the year (5th of 12). Daytime temperature runs 2°C below the annual average (14°C). September runs 1°C warmer than August (11°C) and warms a further 2°C into October (13°C).
September sunrise & sunset in Puerto Montt
Times shown for Puerto Montt local time (America/Santiago), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Puerto Montt — September
Golden-hour and blue-hour windows for the 15th of September, in Puerto Montt's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Puerto Montt in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Puerto Montt's popularity.
Crowds & pricing — September in Puerto Montt
Puerto Montt is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — September in Puerto Montt
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Puerto Montt in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 18°C / 64°F | 12°C / 53°F | 82 mm | 17 | — |
| February | 18°C / 65°F | 12°C / 54°F | 65 mm | 14 | — |
| March | 16°C / 62°F | 11°C / 51°F | 121 mm | 17 | — |
| April | 14°C / 58°F | 9°C / 48°F | 186 mm | 19 | — |
| May | 13°C / 55°F | 8°C / 46°F | 223 mm | 22 | — |
| June | 10°C / 50°F | 6°C / 42°F | 264 mm | 24 | — |
| July | 10°C / 50°F | 5°C / 41°F | 254 mm | 24 | — |
| August | 11°C / 51°F | 5°C / 42°F | 264 mm | 24 | — |
| September | 12°C / 53°F | 6°C / 42°F | 169 mm | 22 | — |
| October | 13°C / 56°F | 7°C / 45°F | 154 mm | 22 | — |
| November | 15°C / 59°F | 9°C / 48°F | 122 mm | 21 | — |
| December | 17°C / 62°F | 11°C / 51°F | 110 mm | 18 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Puerto Montt in September →
Frequently asked questions
How hot is Puerto Montt in September?
In September, Puerto Montt averages a high of 12°C (53°F) and a low of 6°C (42°F) — generally cool.
Does it rain a lot in Puerto Montt in September?
September is quite rainy in Puerto Montt, with about 22 rainy days on average.
Is September a good time to visit Puerto Montt?
September is cool but on the rainy side. It suits travelers who are comfortable with cool weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Puerto Montt in September?
Pack a warm jacket and layers, plus a compact umbrella or rain jacket. See the full September packing list for Puerto Montt for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.