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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.
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
Constitución Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Constitución - and find the best time to visit.
Historical weather records 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.
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).
Best Places in Chile in September
Find out more about the weather in Chile and which places have the best travel conditions in this month. See all of Chile in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
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.
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Cycling6/10 -
Walking6/10 -
Barbeque5/10 -
Camping4/10 -
Outdoor sports10/10
Constitución 3-Day Forecast
More climate data for Constitución
See the full Constitución climate overview or explore weather in Chile.
Popular in September
Where to go in September - average daytime high across popular destinations.
San Pedro de Atacama
21°C (70°F) Hanga Roa
21°C (70°F) La Serena19°C (66°F) Santiago18°C (64°F) Viña del Mar16°C (61°F) Concón16°C (61°F) Valparaíso15°C (59°F) Pucón
13°C (55°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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