December weather forecast and climate
Piedras Negras, Mexico

The first month of the winter, December, is also an enjoyable month in Piedras Negras, Mexico, with average temperature varying between 9.2°C (48.6°F) and 18.5°C (65.3°F).

Temperature

In December, the average high-temperature slightly decreases, from an agreeable 22.3°C (72.1°F) in November, to a comfortable 18.5°C (65.3°F). In December, the average low-temperature is 9.2°C (48.6°F).

Humidity

The average relative humidity in Piedras Negras is 59%.

Rainfall

In Piedras Negras, during 5.2 rainfall days, 11mm (0.43") of precipitation is typically accumulated. In Piedras Negras, during the entire year, the rain falls for 89.7 days and collects up to 341mm (13.43") of precipitation.

Snowfall

The only month with snowfall is December. December is the month with the most snowfall in Piedras Negras. Snow falls for 0.1 days and accumulates 1mm (0.04") of snow.

Daylight

With an average of 10.3h of daylight, December has the shortest days of the year.

Sunshine

The average sunshine in December is 6.1h.

UV index

Months with the lowest UV index are January and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Piedras Negras?

The average high-temperature, in December, in Piedras Negras, is 18.5°C (65.3°F), while the average low-temperature is 9.2°C (48.6°F).

What is the average humidity in December in Piedras Negras?

In December, the average relative humidity in Piedras Negras, Mexico, is 59%.

How much does it rain in Piedras Negras in December?

In December, in Piedras Negras, the rain falls for 5.2 days. Throughout December, 11mm (0.43") of precipitation is accumulated.

When does it start to snow in Piedras Negras?

December is the first month it typically snows in Piedras Negras, Mexico. Throughout December, in the average 0.1 snowfall days, it receives 1mm (0.04") of snow.

When does it snow the most in Piedras Negras?

The month with the most snowfall in Piedras Negras is December when snow falls for 0.1 days and typically aggregates up to 1mm (0.04") of snow.

What is the month with the shortest days in Piedras Negras?

With an average of 10.3h of daylight, December has the shortest days of the year in Piedras Negras, Mexico.

What is the average length of the day in December in Piedras Negras?

In Piedras Negras, Mexico, the average length of the day in December is 10.3h.

How many hours of sunshine does Piedras Negras have in December?

In Piedras Negras, the average sunshine in December is 6.1h.

When is the lowest UV index in Piedras Negras?

Months with the lowest UV index in Piedras Negras are January and December, with an average maximum UV index of 4.

What is the UV index intensity in December in Piedras Negras?

In Piedras Negras, Mexico, the average daily maximum UV index in December is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.
Average temperature in December - Piedras Negras, Mexico
  • Average high temperature in December: 18.5°C

The warmest month (with the highest average high temperature) is August (37.2°C).
The month with the lowest average high temperature is January (18.3°C).

  • Average low temperature in December: 9.2°C

The month with the highest average low temperature is August (26.3°C).
The coldest month (with the lowest average low temperature) is January (8.3°C).

Average pressure in December - Piedras Negras, Mexico
  • Average pressure in December: 1019.3mbar

The month with the highest atmospheric pressure is January (1020.7mbar).
The month with the lowest atmospheric pressure is May (1011.6mbar).

Average wind speed in December - Piedras Negras, Mexico
  • Average wind speed in December: 12.4km/h

The windiest month (with the highest average wind speed) is June (18.8km/h).
The calmest month (with the lowest average wind speed) is December (12.4km/h).

Average humidity in December - Piedras Negras, Mexico
  • Average humidity in December: 59%

The month with the highest relative humidity is November (60%).
The month with the lowest relative humidity is August (47%).

Average rainfall in December - Piedras Negras, Mexico
  • Average rainfall in December: 11mm

The wettest month (with the highest rainfall) is May (75mm).
The driest months (with the least rainfall) are January and February (8mm).

Average rainfall days in December - Piedras Negras, Mexico
  • Average rainfall days in December: 5.2 days

The month with the highest number of rainy days is September (13.8 days).
The month with the least rainy days is January (4.3 days).

Average snowfall in December - Piedras Negras, Mexico
  • Average snowfall in December: 1mm

The month with the highest snowfall is December (1mm).
Months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0mm).

Average snowfall days in December - Piedras Negras, Mexico
  • Average snowfall days in December: 0.1 days

Months with the highest number of snowfall days are January, February and December (0.1 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

Average daylight in December / Average sunshine in December - Piedras Negras, Mexico
  • Average daylight in December: 10.3h

The month with the longest days is June (Average daylight: 14h).
The month with the shortest days is December (Average daylight: 10.3h).

  • Average sunshine in December: 6.1h

The month with the most sunshine is June (Average sunshine: 11.1h).
The month with the least sunshine is November (Average sunshine: 6h).

Average sunshine days in December - Piedras Negras, Mexico
  • Average sunshine days in December: 24.4 days

The month with the most sunshine days is January (25.6 days).
The month with the least sunshine days is September (14.7 days).

Average UV index in December - Piedras Negras, Mexico
  • Average UV index in December: 4

Months with the highest UV index are June, July and August (UV index 8).
Months with the lowest UV index are January and December (UV index 4).

Average cloud cover in December - Piedras Negras, Mexico
  • Average cloud cover in December: 29

The month with the most cloud cover is May (Cloud cover 32).
The month with the least cloud cover is August (Cloud cover 16).

Average visibility in December - Piedras Negras, Mexico
  • Average visibility in December: 10km

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