December weather forecastMejillones, Chile

December

Weather in December

The first month of the summer, December, is still a pleasant month in Mejillones, Chile, with an average temperature ranging between max 21.2°C (70.2°F) and min 16.7°C (62.1°F).

Temperature

December's average high-temperature stands at a still pleasant 21.2°C (70.2°F), showing little deviation from November's 20.1°C (68.2°F). December's average low-temperature in Mejillones, Chile, is a comfortable 16.7°C (62.1°F), reflecting a minor difference from the day's peak temperatures.

Humidity

The average relative humidity in December in Mejillones is 73%.

Rainfall

January through May, September through December are months without rainfall in Mejillones.

Daylight

December has the longest days of the year, with an average of 13h and 30min of daylight.
On the first day of the month, sunrise is at 06:47 and sunset at 20:14. On the last day of December, in Mejillones, sunrise is at 06:59 and sunset at 20:30 -03.

Sunshine

February, September through December, with an average of 10h of sunshine, are months with the most sunshine.

UV index

March through December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, an average UV index of 5 transforms into the following instructions:
Take necessary precautions - Protection from skin and eye injury is mandatory. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.

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

Frequently asked questions

During December, Mejillones experiences an average high-temperature of 21.2°C (70.2°F) and a low-temperature of 16.7°C (62.1°F).

In December, the average relative humidity in Mejillones is 73%.

In Mejillones, Chile, rain does not fall in January through May, September through December.

With an average of 13h and 30min of daylight, December has the longest days of the year in Mejillones, Chile.

The average day length in December in Mejillones, Chile, is 13h and 32min.

In December, on the first day of the month, sunrise is at 06:47 and sunset at 20:14. On the last day of the month, sunrise is at 06:59 and sunset at 20:30 -03.

February, September through December, with an average of 10h of sunshine, are months with the most sunshine in Mejillones.

In Mejillones, the average sunshine duration in December is 10h.

March through December, with an average maximum UV index of 5, are months with the lowest UV index.

In Mejillones, the average daily maximum UV index in December is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

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

Nov

December

Jan

Average high temperature

20.1°C

21.2°C

23.2°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

13.8km/h

14.1km/h

13.5km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

30.9

30.4

Average UV index

Average cloud cover

10%

Average visibility

10km

Average temperature in December
Mejillones, Chile

Average high temperature in December: 21.2°C

The warmest month (with the highest average high temperature) is February (23.7°C).
The month with the lowest average high temperature is July (18.3°C).

Average low temperature in December: 16.7°C

The month with the highest average low temperature is February (18.8°C).
The coldest month (with the lowest average low temperature) is August (12.6°C).

Average pressure in December
Mejillones, Chile

Average pressure in December: 1012.9mbar

The month with the highest atmospheric pressure is July (1015.5mbar).
The month with the lowest atmospheric pressure is February (1012mbar).

Average wind speed in December
Mejillones, Chile

Average wind speed in December: 12.8km/h

The windiest month (with the highest average wind speed) is December (12.8km/h).
The calmest months (with the lowest average wind speed) are May and June (10.9km/h).

Average humidity in December
Mejillones, Chile

Average humidity in December: 73%

The months with the highest relative humidity are February, March and April (75%).
The months with the lowest relative humidity are June and July (67%).

Average rainfall in December
Mejillones, Chile

Average rainfall in December: 0mm

The wettest months (with the highest rainfall) are June, July and August (1mm).
The driest months (with the least rainfall) are January, February, March, April, May, September, October, November and December (0mm).

Average rainfall days in December
Mejillones, Chile

Average rainfall days in December: 0.2 days

The month with the highest number of rainy days is July (1.6 days).
The month with the least rainy days is November (0 days).

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

Average daylight in December: 13h and 30min

The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 42min).

Average sunshine in December: 10h and 0min

The months with the most sunshine are February, September, October, November and December (Average sunshine: 10h and 0min).
The month with the least sunshine is July (Average sunshine: 9h and 48min).

Average sunshine days in December
Mejillones, Chile

Average sunshine days in December: 30.9 days

The month with the most sunshine days is October (31 days).
The month with the least sunshine days is February (27.2 days).

Average UV index in December
Mejillones, Chile

Average UV index in December: 5

The months with the highest UV index are January and February (UV index 6).
The months with the lowest UV index are March, April, May, June, July, August, September, October, November and December (UV index 5).

Average cloud cover in December
Mejillones, Chile

Average cloud cover in December: 6

The month with the most cloud cover is February (Cloud cover 11).
The month with the least cloud cover is September (Cloud cover 2).

Average visibility in December
Mejillones, 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).