Constitución Weather in September

With daytime temperatures of 15°C (59°F) and nighttime lows of 9°C (48°F), September in Constitución brings moderate temperatures during the day. Some rainfall is to be expected during the month.

Rainfall in Constitución in September

You can expect rain on roughly 5 days based on historical data, averaging 55 mm (2.2 in) for the month. Although rain is not especially frequent, individual showers can still be quite heavy.

Temperature in Constitución in September

Daytime temperatures in Constitución reach 15°C (59°F) in September, dropping to 9°C (48°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 9°C (48°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, November and December typically offer the best weather for Constitución.

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 Constitución's climate page.

Constitución Temperature in September

Min Temperature 9°C (48°F)  

Max Temperature 15°C (59°F)  

Chance of Rain 15%  

Precipitation 55 mm (2.2 in)  

Rainy days 5 days  

Historical weather for Constitución in September

Browse day-by-day weather records for Constitución spanning 50 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

‹ January February March April May June July August September October November December ›

Constitución historical weather extremes in September

Based on 19 years of weather observations (2006-2025), these are the most extreme conditions recorded in Constitución.

• The hottest September day on record in Constitución reached 18°C (64°F) (September 26, 2011).
• Constitución experienced its chilliest September day on September 2, 2007, reaching only 10°C (50°F).
• The lowest overnight temperature recorded in September was 6°C (43°F) (September 29, 2023).

What to Wear in Constitución 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. Wet weather is likely, so pack waterproof gear for multiple rainy days.

What To Do in Constitución in September

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

Cycling

6/10

Walking

6/10

Barbeque

5/10

Camping

4/10

Outdoor sports

10/10

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 Constitución's climate page.

More climate data for Constitución

Temperature Rainfall

See the full Constitución climate overview or explore weather in Chile.