December weather forecastSan Clemente, Chile

December

Weather in December

The first month of the summer, December, is still a warm month in San Clemente, Chile, with an average temperature fluctuating between 11°C (51.8°F) and 29.4°C (84.9°F).

Temperature

San Clemente's transition into December sees a mild rise in the average high-temperature, edging from a moderately hot 25.8°C (78.4°F) in November to a still warm 29.4°C (84.9°F). In December, the nighttime temperature plummets remarkably from the daily apex to a steady average of 11°C (51.8°F).

Heat index

During December, the heat index is appraised at a hot 30°C (86°F). If exposure and ongoing activity persist, they might induce a state of tiredness and heat cramps.
For clarity, heat index numbers account for light winds and areas under shade. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.

Humidity

In San Clemente, the average relative humidity in December is 51%.

Rainfall

In December, in San Clemente, Chile, the rain falls for 2.3 days. Throughout December, 8mm (0.31") of precipitation is accumulated. Throughout the year, in San Clemente, Chile, there are 67.7 rainfall days, and 508mm (20") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 14h and 30min of daylight.
On the first day of the month, sunrise is at 06:23 and sunset at 20:46. On the last day of December, in San Clemente, sunrise is at 06:33 and sunset at 21:04 -03.

Sunshine

In San Clemente, the average sunshine in December is 10.5h.

UV index

The months with the highest UV index are January, February and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 6 in December interprets into the following advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.

Updated: Jan 24, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature in San Clemente, Chile, during December is 29.4°C (84.9°F) and the low-temperature is 11°C (51.8°F). In December, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is appraised at 30°C (86°F).

The average relative humidity in December is 51%.

In December, in San Clemente, the rain falls for 2.3 days. Throughout December, 8mm (0.31") of precipitation is accumulated.

The month with the longest days in San Clemente is December, with an average of 14h and 30min of daylight.

The average day length in December is 14h and 31min.

On the first day of December in San Clemente, sunrise is at 06:23 and sunset at 20:46. On the last day of the month, sunrise is at 06:33 and sunset at 21:04 -03.

The average sunshine duration in December is 10.5h.

January, February and December, with an average maximum UV index of 6, are months with the highest UV index in San Clemente.

In December, the average daily maximum UV index in San Clemente is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

25.8°C

29.4°C

32.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.9km/h

10.6km/h

10.7km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

25.6

28.5

28.8

Average UV index

Average cloud cover

15%

10%

Average visibility

10km

Average temperature in December
San Clemente, Chile

Average high temperature in December: 29.4°C

The warmest month (with the highest average high temperature) is January (32.4°C).
The month with the lowest average high temperature is July (13.3°C).

Average low temperature in December: 11°C

The month with the highest average low temperature is January (13°C).
The coldest month (with the lowest average low temperature) is July (4.6°C).

Average pressure in December
San Clemente, Chile

Average pressure in December: 1014.7mbar

The month with the highest atmospheric pressure is July (1020.1mbar).
The month with the lowest atmospheric pressure is February (1013.9mbar).

Average wind speed in December
San Clemente, Chile

Average wind speed in December: 9.1km/h

The windiest months (with the highest average wind speed) are January and December (9.1km/h).
The calmest month (with the lowest average wind speed) is May (7.1km/h).

Average humidity in December
San Clemente, Chile

Average humidity in December: 51%

The month with the highest relative humidity is August (77%).
The months with the lowest relative humidity are January and February (47%).

Average rainfall in December
San Clemente, Chile

Average rainfall in December: 8mm

The wettest month (with the highest rainfall) is June (131mm).
The driest months (with the least rainfall) are January and February (2mm).

Average rainfall days in December
San Clemente, Chile

Average rainfall days in December: 2.3 days

The month with the highest number of rainy days is August (11.2 days).
The month with the least rainy days is February (0.8 days).

Average daylight in December /
Average sunshine in December
San Clemente, Chile

Average daylight in December: 14h and 30min

The month with the longest days is December (Average daylight: 14h and 30min).
The month with the shortest days is June (Average daylight: 9h and 48min).

Average sunshine in December: 10h and 30min

The month with the most sunshine is January (Average sunshine: 11h and 30min).
The months with the least sunshine are June and July (Average sunshine: 7h and 24min).

Average sunshine days in December
San Clemente, Chile

Average sunshine days in December: 28.5 days

The month with the most sunshine days is March (29.7 days).
The month with the least sunshine days is June (19 days).

Average UV index in December
San Clemente, Chile

Average UV index in December: 6

The months with the highest UV index are January, February and December (UV index 6).
The months with the lowest UV index are May, June, July and September (UV index 3).

Average cloud cover in December
San Clemente, Chile

Average cloud cover in December: 10

The months with the most cloud cover are June and August (Cloud cover 36).
The month with the least cloud cover is February (Cloud cover 6).

Average visibility in December
San Clemente, Chile

Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, October, November and December (10km).
The months with the lowest visibility are July, August and September (9km).