December weather forecast
Santiago, Chile

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Breathtaking view of the cityscape of Santiago, Chile, with the Andean Mountain Ranges in the distance
Breathtaking view of the cityscape of Santiago, Chile, with the Andean Mountain Ranges in the distance

Weather in December

December brings summer to Santiago, drenching the city in blue skies and sunlight. The transformation can be noticed in the significant rise in maximum day temperatures when compared to November. However, despite being the commencement of summer, rainfall increases from 2mm (0.08") to 5mm (0.2"). Regardless, the number of sunny days remains high and the overall mood in Santiago remains upbeat, with residents and tourists relishing the balmy weather and the beginning of year-end festivities.

Temperature

Upon the onset of December, Santiago witnesses an average high-temperature of a moderately hot 23.8°C (74.8°F), showing a close resemblance to the prior month. Santiago, amid December nights, sees a noteworthy disparity from daily highs with an average temperature of 10.9°C (51.6°F).

Humidity

The average relative humidity in December is 42%.

Rainfall

In Santiago, in December, during 1.5 rainfall days, 2mm (0.08") of precipitation is typically accumulated. In Santiago, Chile, during the entire year, the rain falls for 45 days and collects up to 190mm (7.48") of precipitation.

Snowfall

January through May, August through December are months without snowfall in Santiago, Chile.

Daylight

December has the longest days of the year, with an average of 14h and 18min of daylight.
On the first day of December in Santiago, sunrise is at 06:25 and sunset at 20:38. On the last day of the month, sunrise is at 06:36 and sunset at 20:55 -03.

Sunshine

In Santiago, the average sunshine in December is 9.8h.

UV index

January through March, November and December, with an average maximum UV index of 5, are months with the highest UV index in Santiago, Chile. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, a daily UV index of 5 turns into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
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Frequently asked questions

What are December temperatures in Santiago?

The high-temperature, in December, in Santiago, is 23.8°C (74.8°F), while the low-temperature averages to 10.9°C (51.6°F).

What is the average humidity in December in Santiago?

In Santiago, the average relative humidity in December is 42%.

How much does it rain in Santiago in December?

In Santiago, Chile, during December, the rain falls for 1.5 days and regularly aggregates up to 2mm (0.08") of precipitation.

When it does not snow in Santiago?

In Santiago, Chile, snow does not fall in January through May, August through December.

When are the longest days in Santiago?

With an average of 14h and 18min of daylight, December has the longest days of the year in Santiago, Chile.

What is the average length of the day in December in Santiago?

The average day length in December in Santiago is 14h and 20min.

When is the sunrise / sunset in December in Santiago?

In December, on the first day of the month, sunrise is at 06:25 and sunset at 20:38. On the last day of the month, sunrise is at 06:36 and sunset at 20:55 -03.

How long on average sun shines in December in Santiago?

The average sunshine duration in December in Santiago is 9.8h.

When is the highest UV index in Santiago?

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 5.

How high is the UV index in December in Santiago?

In December, the average daily maximum UV index in Santiago is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in December
Santiago, Chile

Average temperature in December - Santiago, Chile
  • Average high temperature in December: 23.8°C

The warmest month (with the highest average high temperature) is January (25.5°C).
The month with the lowest average high temperature is July (11.4°C).

  • Average low temperature in December: 10.9°C

The month with the highest average low temperature is January (12.4°C).
The coldest month (with the lowest average low temperature) is July (2.4°C).

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Average pressure in December
Santiago, Chile

Average pressure in December - Santiago, Chile
  • Average pressure in December: 1014.8mbar

The month with the highest atmospheric pressure is July (1019.6mbar).
The month with the lowest atmospheric pressure is February (1014.4mbar).

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Average wind speed in December
Santiago, Chile

Average wind speed in December - Santiago, Chile
  • Average wind speed in December: 8.1km/h

The windiest month (with the highest average wind speed) is June (9.2km/h).
The calmest months (with the lowest average wind speed) are March and April (7.2km/h).

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Average humidity in December
Santiago, Chile

Average humidity in December - Santiago, Chile
  • Average humidity in December: 42%

The month with the highest relative humidity is July (55%).
The months with the lowest relative humidity are March and April (36%).

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Average rainfall in December
Santiago, Chile

Average rainfall in December - Santiago, Chile
  • Average rainfall in December: 2mm

The wettest month (with the highest rainfall) is June (67mm).
The driest months (with the least rainfall) are January, February and March (1mm).

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Average rainfall days in December
Santiago, Chile

Average rainfall days in December - Santiago, Chile
  • Average rainfall days in December: 1.5 days

The month with the highest number of rainy days is June (7.4 days).
The month with the least rainy days is February (0.7 days).

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Average snowfall in December
Santiago, Chile

Average snowfall in December - Santiago, Chile
  • Average snowfall in December: 0mm

The month with the highest snowfall is June (6mm).
The months with the least snowfall are January, February, March, April, May, August, September, October, November and December (0mm).

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Average snowfall days in December
Santiago, Chile

Average snowfall days in December - Santiago, Chile
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is July (0.3 days).
The months with the least snowfall days are January, February, March, April, May, August, September, October, November and December (0 days).

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Average daylight in December /
Average sunshine in December
Santiago, Chile

Average daylight in December / Average sunshine in December - Santiago, Chile
  • Average daylight in December: 14h and 2min

The month with the longest days is December (Average daylight: 14h and 18min).
The month with the shortest days is June (Average daylight: 10h and 0min).

  • Average sunshine in December: 9h and 5min

The month with the most sunshine is February (Average sunshine: 10h and 0min).
The months with the least sunshine are June and July (Average sunshine: 8h and 18min).

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Average sunshine days in December
Santiago, Chile

Average sunshine days in December - Santiago, Chile
  • Average sunshine days in December: 29 days

The month with the most sunshine days is March (29.9 days).
The month with the least sunshine days is June (22.2 days).

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Average UV index in December
Santiago, Chile

Average UV index in December - Santiago, Chile
  • Average UV index in December: 5

The months with the highest UV index are January, February, March, November and December (UV index 5).
The months with the lowest UV index are May, June, July, August and September (UV index 3).

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Average cloud cover in December
Santiago, Chile

Average cloud cover in December - Santiago, Chile
  • Average cloud cover in December: 6

The month with the most cloud cover is June (Cloud cover 26).
The month with the least cloud cover is February (Cloud cover 3).

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Average visibility in December
Santiago, Chile

Average visibility in December - Santiago, Chile
  • Average visibility in December: 10km

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

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Santiago, Chile

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