December weather forecastLa Unión, Guatemala

December

Weather in December

December, the first month of the winter in La Unión, is still a pleasant month, with an average temperature varying between 14.4°C (57.9°F) and 22.1°C (71.8°F).

Temperature

The shift from November to December is characterized by an average high-temperature of a still pleasant 22.1°C (71.8°F), not significantly different from the 22.5°C (72.5°F) of November. La Unión observes an average low-temperature of 14.4°C (57.9°F) during December.

Humidity

The average relative humidity in December in La Unión is 89%.

Rainfall

In La Unión, Guatemala, during December, the rain falls for 21.4 days and regularly aggregates up to 37mm (1.46") of precipitation. Throughout the year, there are 297.7 rainfall days, and 1500mm (59.06") of precipitation is accumulated.

Daylight

The month with the shortest days is December, with an average of 11h and 18min of daylight.
On the first day of the month, sunrise is at 06:07 and sunset at 17:25. On the last day of December, sunrise is at 06:22 and sunset at 17:38 CST.

Sunshine

The average sunshine in December in La Unión is 5.6h.

UV index

The months with the lowest UV index in La Unión, Guatemala, are January, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 4 during December translates into the following guidance:
Ensure safety - Sun damage prevention is strongly urged. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.

Updated: Feb 15, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in December, in La Unión, is 22.1°C (71.8°F) and the average low-temperature is 14.4°C (57.9°F). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in May is evaluated at 31°C (87.8°F).

In La Unión, the average relative humidity in December is 89%.

In La Unión, in December, during 21.4 rainfall days, 37mm (1.46") of precipitation is typically accumulated.

With an average of 11h and 18min of daylight, December has the shortest days of the year in La Unión, Guatemala.

In La Unión, the average day length in December is 11h and 16min.

On the first day of December in La Unión, sunrise is at 06:07 and sunset at 17:25. On the last day of the month, sunrise is at 06:22 and sunset at 17:38 CST.

In December, the average sunshine duration in La Unión is 5.6h.

The months with the lowest UV index are January, November and December, with an average maximum UV index of 4.

The average daily maximum UV index in December in La Unión is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to 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

22.5°C

22.1°C

21.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8km/h

8.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

3.9

5.8

Average UV index

Average cloud cover

Average visibility

Average temperature in December
La Unión, Guatemala

Average high temperature in December: 22.1°C

The warmest month (with the highest average high temperature) is April (28.8°C).
The month with the lowest average high temperature is January (21.8°C).

Average low temperature in December: 14.4°C

The month with the highest average low temperature is May (18.6°C).
The coldest month (with the lowest average low temperature) is January (14.1°C).

Average pressure in December
La Unión, Guatemala

Average pressure in December: 1015.1mbar

The month with the highest atmospheric pressure is January (1015.9mbar).
The months with the lowest atmospheric pressure are May and September (1012.2mbar).

Average wind speed in December
La Unión, Guatemala

Average wind speed in December: 7.2km/h

The windiest month (with the highest average wind speed) is January (7.8km/h).
The calmest month (with the lowest average wind speed) is September (4.4km/h).

Average humidity in December
La Unión, Guatemala

Average humidity in December: 89%

The months with the highest relative humidity are October and November (91%).
The month with the lowest relative humidity is April (76%).

Average rainfall in December
La Unión, Guatemala

Average rainfall in December: 37mm

The wettest month (with the highest rainfall) is September (261mm).
The driest month (with the least rainfall) is February (32mm).

Average rainfall days in December
La Unión, Guatemala

Average rainfall days in December: 21.4 days

The month with the highest number of rainy days is September (29.2 days).
The month with the least rainy days is February (19.1 days).

Average daylight in December /
Average sunshine in December
La Unión, Guatemala

Average daylight in December: 11h and 18min

The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 18min).

Average sunshine in December: 5h and 36min

The month with the most sunshine is April (Average sunshine: 10h and 18min).
The month with the least sunshine is November (Average sunshine: 5h and 0min).

Average sunshine days in December
La Unión, Guatemala

Average sunshine days in December: 6 days

The month with the most sunshine days is March (8.3 days).
The month with the least sunshine days is September (0.7 days).

Average UV index in December
La Unión, Guatemala

Average UV index in December: 4

The months with the highest UV index are March, April, May and June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 4).