Valparaíso Weather in September
In Valparaíso, September brings moderate daytime temperatures around 15°C (59°F), with nights cooling to 10°C (50°F). Some rainfall is to be expected.
Rainfall in Valparaíso in September
Typically, about 3 days will experience rainfall, with an average of 30 mm (1.2 in) for the month. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.
Temperature in Valparaíso in September
If you're visiting Valparaíso in September, expect highs of 15°C (59°F) and overnight lows around 10°C (50°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. At 10°C (50°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Valparaíso in September
With about 147 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April, November and December typically offer the best weather for Valparaíso.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Chile, check out our Valparaíso's climate page.
Valparaíso Temperature in September
Min Temperature
10°C (50°F)
Max Temperature
15°C (59°F)
Chance of Rain
10%
Precipitation
30 mm (1.2 in)
Rainy days
3 days
Humidity
78%
Sunshine
147 hours
Percentage Sunshine
Daily Historical Temperatures
41-year average (1976-2025)
Based on our historical records, temperatures in Valparaíso typically stay consistent throughout September, with daily highs averaging around 15°C (59°F). Nights are cool, with lows typically ranging from 8°C (46°F) to 10°C (50°F).
Average temperatures in September
Historical weather for Valparaíso in September
Browse day-by-day weather records for Valparaíso spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Valparaíso historical weather extremes in September
According to our 29 years of weather records for Valparaíso, the following extremes were recorded between 1996 and 2025.
- Valparaíso recorded its highest September temperature of 28°C (82°F) on September 15, 2023.
- The lowest daytime temperature in September was 11°C (52°F), recorded on September 27, 2009.
- Nighttime temperatures dropped to 2°C (36°F) on September 24, 2013, marking the coldest September night on record.
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
What to Wear in Valparaíso in September
Pack for changing conditions in Valparaíso in September. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Pack a light rain jacket or compact umbrella for occasional showers. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Valparaíso in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Chile, check out our Valparaíso's climate page.
Temperature Rainfall Sunshine Humidity
See the full Valparaíso climate overview or explore weather in Chile.
