Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
As November transitions into December, a subtle temperature shift is observed, with average highs adjusting from a wintry 5.3°C (41.5°F) to a frosty 9.2°C (48.6°F). December nights in Portillo cool down to an average low-temperature of -1.3°C (29.7°F).Humidity
The average relative humidity in December is 50%.Rainfall
In Portillo, during December, the rain falls for 3.5 days and regularly aggregates up to 9mm (0.35") of precipitation. In Portillo, during the entire year, the rain falls for 44.7 days and collects up to 314mm (12.36") of precipitation.Snowfall
January through December are months with snowfall in Portillo. In Portillo, in December, snow falls for 2.5 days, with typically accumulated 37mm (1.46") of snow. Throughout the year, there are 75.2 snowfall days, and 2183mm (85.94") of snow is accumulated.Daylight
With an average of 14h and 18min of daylight, December has the longest days of the year.On the first day of the month, sunrise is at 06:24 and sunset at 20:34. On the last day of December, in Portillo, Chile, sunrise is at 06:35 and sunset at 20:52 -03.
Sunshine
In December, the average sunshine in Portillo is 9.8h.UV index
The months with the highest UV index in Portillo are January through March and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 3 during December translates into the following directions:
Prioritize safety - Suggestions to prevent sun damage are offered. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Frequently asked questions
What is the usual temperature for Portillo in December?
What is the average humidity in December in Portillo?
How many days does it rain in December in Portillo?
How much does it snow in Portillo in December?
When are the longest days in Portillo?
How many hours of daylight does Portillo have in December?
When are sunrise and sunset in December in Portillo?
How many hours of sunshine does Portillo have in December?
What is the month with the highest UV index in Portillo?
What is the UV index reading in December in Portillo?
Average temperature in December
Portillo, Chile
- Average high temperature in December: 9.2°C
The warmest month (with the highest average high temperature) is January (12°C).
The month with the lowest average high temperature is July (-2.3°C).
- Average low temperature in December: -1.3°C
The month with the highest average low temperature is January (2.5°C).
The coldest month (with the lowest average low temperature) is July (-12.2°C).
Average pressure in December
Portillo, Chile
- Average pressure in December: 1014.2mbar
The month with the highest atmospheric pressure is July (1019.4mbar).
The months with the lowest atmospheric pressure are January, February and December (1014.2mbar).
Average wind speed in December
Portillo, Chile
- Average wind speed in December: 10.1km/h
The windiest month (with the highest average wind speed) is December (10.1km/h).
The calmest month (with the lowest average wind speed) is May (8.7km/h).
Average humidity in December
Portillo, Chile
- Average humidity in December: 50%
The months with the highest relative humidity are September and October (63%).
The month with the lowest relative humidity is March (38%).
Average rainfall in December
Portillo, Chile
- Average rainfall in December: 9mm
The wettest month (with the highest rainfall) is June (80mm).
The driest month (with the least rainfall) is March (5mm).
Average rainfall days in December
Portillo, Chile
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is January (6.6 days).
The month with the least rainy days is March (2.8 days).
Average snowfall in December
Portillo, Chile
- Average snowfall in December: 37mm
The month with the highest snowfall is June (621mm).
The month with the least snowfall is January (18mm).
Average snowfall days in December
Portillo, Chile
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is June (11.5 days).
The months with the least snowfall days are January, February and March (1.3 days).
Average daylight in December /
Average sunshine in December
Portillo, 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: 9h and 54min).
The month with the least sunshine is June (Average sunshine: 8h and 6min).
Average sunshine days in December
Portillo, Chile
- Average sunshine days in December: 23.7 days
The month with the most sunshine days is March (26.8 days).
The month with the least sunshine days is June (18 days).
Average UV index in December
Portillo, Chile
- Average UV index in December: 3
The months with the highest UV index are January, February, March and December (UV index 3).
The months with the lowest UV index are April, May, June, July, August, September, October and November (UV index 2).
Average cloud cover in December
Portillo, Chile
- Average cloud cover in December: 8
The months with the most cloud cover are June and July (Cloud cover 27).
The month with the least cloud cover is February (Cloud cover 6).
Average visibility in December
Portillo, Chile
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, November and December (10km).
The months with the lowest visibility are May, June, July, August, September and October (9km).
Portillo, Chile
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