Valparaíso weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Excellent
Best time to visit: October – April
What is the weather like in Valparaíso in September?
In September, Valparaíso is mild: daytime highs average 16 °C, and nights cool down to about 9 °C. The sea averages 12.8 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is rare: about 3 days bring 22 mm in total. All in all, September is an excellent month for a holiday in Valparaíso.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 73 | 81 | 96 |
| Day | 15° | 16° | 18° |
| Night | 8° | 9° | 11° |
| Sea | 13° | 13° | 13° |
| Sun | 5 h | 6 h | 8 h |
| Rain days | 5 | 3 | 2 |
More details for September
- Daylight
- 11 h 51 min07:47 – 19:37
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 47 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC−3America/Santiago
How the score comes together
- Temperatureweight 50 %82 %
- Sunshineweight 20 %52 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Valparaíso in September: quick answers
Is Valparaíso hot in September?
No. In September, Valparaíso is mild: daytime highs average 16 °C and nights drop to about 9 °C.
Can you swim in Valparaíso in September?
Only if you don't mind cold water: in September the sea averages just 12.8 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Valparaíso in September?
Rain is rare: about 3 days bring 22 mm in total.
Valparaíso month by month
The whole year in ValparaísoAll destinations: ChileWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences