September weather forecast
Valparaíso, Chile

September in Valparaíso, Chile begins to hint at spring's advent, with temperatures showing a steady rise. The city starts shaking off the winter chill and greets the freshness of the approaching season. The rainfall shows a drop to 27mm (1.06"), indicating the end of the high rainfall period. The increase in sunshine hours denotes the start of longer days and shorter nights. As spring approaches, the city's beauty begins to shine in a new light.

Temperature

The advent of September in Valparaíso brings an average high-temperature of a still moderate 15.4°C (59.7°F), almost identical to the preceding month. September in Valparaíso witnesses an average low-temperature hovering around a chilly 9.5°C (49.1°F).

Humidity

In September, the average relative humidity in Valparaíso is 78%.

Rainfall

In September, in Valparaíso, Chile, the rain falls for 2.7 days. Throughout September, 27mm (1.06") of precipitation is accumulated. In Valparaíso, during the entire year, the rain falls for 26.6 days and collects up to 373mm (14.69") of precipitation.

Sea temperature

In September, the average sea temperature is 13.2°C (55.8°F).
Note: Dipping into 13.2°C (55.8°F) below 10°C (50°F) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Swimming momentarily at 13°C (55.4°F) can be jarring.

Daylight

In September, the average length of the day is 11h and 55min.
On the first day of September in Valparaíso, sunrise is at 07:02 and sunset at 18:29 -04. On the last day of the month, sunrise is at 07:23 and sunset at 19:48 -03.
Note: On Sunday, 08. September 2024, at 00:00, Daylight Saving Time starts, and the time zone changes from -04 to -03. Daylight Saving Time lasts until Sunday, 06. April 2025, at 00:00; consequently, the time zone reverts from -03 to -04.

Sunshine

In September, the average sunshine is 4.9h.

UV index

In September, the average daily maximum UV index in Valparaíso is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.