Puerto Montt Weather in September

During September, Puerto Montt experiences moderate daytime temperatures of 14°C (57°F) and cooler nights around 6°C (43°F). September sits within the rainy season, so expect regular and often heavy rainfall.

Rainfall in Puerto Montt in September

As part of the rainy season, Puerto Montt sees around 8 days of rain in September, with an average of 174 mm (6.9 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.

Temperature in Puerto Montt in September

In September, Puerto Montt sees moderate temperatures, with highs of 14°C (57°F). Nights drop to around 6°C (43°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With overnight lows of 6°C (43°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Puerto Montt in September

The area enjoys a balanced 125 hours of sunlight, ensuring it's neither too rainy nor too sunny.

Wind Speed in Puerto Montt in September

September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

If you prefer enjoying temperate temperatures and rain-free days, January and February typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit Chile, check out our Puerto Montt's climate page.

Puerto Montt Temperature in September

Min Temperature 6°C (43°F)  

Max Temperature 14°C (57°F)  

Chance of Rain 25%  

Precipitation 174 mm (6.9 in)  

Rainy days 8 days  

Humidity 86%  

Windspeed 4 m/s (8 knots)  

Sunshine 125 hours  

Percentage Sunshine  

Daily Historical Temperatures

49-year average (1976-2025)

Based on our historical records, temperatures in Puerto Montt typically stay consistent throughout September, with daily highs averaging around 14°C (57°F). Nights are cold, with lows typically ranging from 3°C (37°F) to 5°C (41°F).

Average temperatures in September

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Daily Historical Precipitation

49-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for Puerto Montt in September

Browse day-by-day weather records for Puerto Montt spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Puerto Montt historical weather extremes in September

Our historical data for Puerto Montt spans 1993 to 2025, revealing these weather extremes.

• The warmest day in September was on September 25, 2012, with a maximum of 23°C (73°F).
• The lowest daytime temperature in September was 5°C (41°F), recorded on September 9, 2000.
• The lowest overnight temperature recorded in September was -3°C (27°F) (September 4, 2019).
• The wettest day in September Puerto Montt was on September 23, 2011 with 100 mm (3.9 in) of precipitation.

What to Wear in Puerto Montt in September

The weather can swing between comfortable and chilly in September, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. It's going to pour! Pack a good poncho and prepare for very wet conditions. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Puerto Montt in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

5/10

Walking

5/10

Camping

3/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Chile, check out our Puerto Montt's climate page.

More climate data for Puerto Montt

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Puerto Montt climate overview or explore weather in Chile.