December weather forecast
Valparaíso, Chile

December brings the onset of summer in Valparaíso, offering a warm end to the year. The weather pattern shows a rise in temperature compared to the previous month. With a meager 1mm (0.04") rainfall, the climatic condition becomes relatively dry, marking December as the second driest month of the year. Despite the increase in humidity, outdoor activities can be thoroughly enjoyed due to the increase in daylight and sunshine hours. The festive season coupled with the appealing weather makes December one of the most attractive times to visit Valparaíso, Chile.

Temperature

With the onset of December, Valparaíso's average high-temperature clocks in at a still comfortable 19.9°C (67.8°F), showing a minor fluctuation from the previous month. Valparaíso in December anticipates an average nighttime temperature of 12.8°C (55°F).

Humidity

The least humid month is December, with an average relative humidity of 70%.

Rainfall

In Valparaíso, in December, during 0.3 rainfall days, 1mm (0.04") of precipitation is typically accumulated. In Valparaíso, Chile, during the entire year, the rain falls for 26.6 days and collects up to 373mm (14.69") of precipitation.

Sea temperature

In Valparaíso, the average seawater temperature in December is 16.4°C (61.5°F).
Note: Most people do not enjoy swimming in water of 16.4°C (61.5°F). Breathing control becomes harder as the temperature descends from 21°C (69.8°F) to 15°C (59°F).

Daylight

With an average of 14h and 18min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 06:30 and sunset at 20:41. On the last day of the month, sunrise is at 06:40 and sunset at 20:58 -03.

Sunshine

The average sunshine in December in Valparaíso, Chile, is 8.5h.

UV index

January and December, with an average maximum UV index of 12, are months with the highest UV index in Valparaíso. A UV Index of 11, and more, symbolizes an extreme threat to health from unsafe exposure to UV radiation for the average person.
Note: In December, a daily UV index of 12 turns into the following recommendations:
Adopt every vital precaution, unprotected skin and eyes may burn rapidly. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.