May weather forecast and climate
Piedras Negras, Mexico

The last month of the spring, May, is another hot month in Piedras Negras, Mexico, with average temperature fluctuating between 33°C (91.4°F) and 21.7°C (71.1°F).

Temperature

In May, the average high-temperature is practically the same as in April - a still hot 33°C (91.4°F). In May, in Piedras Negras, Mexico, the average low-temperature is 21.7°C (71.1°F).

Heat index

In May, the average heat index is calculated to a sweltering 38.8°C (101.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, wind, differences in body mass, height, and shape, and pregnancy affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

In May, the average relative humidity in Piedras Negras is 58%.

Rainfall

May is the month with the most rainfall in Piedras Negras. Rain falls for 11.8 days and accumulates 75mm (2.95") of precipitation.

Snowfall

January through November are months without snowfall.

Daylight

The average length of the day in Piedras Negras is 13.6h.

Sunshine

In May, the average sunshine is 9.3h.

UV index

In May, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in May in Piedras Negras?

In Piedras Negras, Mexico, in May, the average high-temperature is 33°C (91.4°F), and the average low-temperature is 21.7°C (71.1°F). In May, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that takes the relative humidity and factores it into the air temperature reading, is calculated to 38.8°C (101.8°F).

What is the average humidity in May in Piedras Negras?

In May, the average relative humidity in Piedras Negras is 58%.

How many days does it rain in May in Piedras Negras?

In May, in Piedras Negras, the rain falls for 11.8 days. Throughout May, 75mm (2.95") of precipitation is accumulated.

What is the wettest month in Piedras Negras?

The month with the most rainfall is May when the rain falls for 11.8 days and typically aggregates up to 75mm (2.95") of precipitation.

When it does not snow in Piedras Negras?

January through November are months without snowfall in Piedras Negras.

How many hours of daylight does Piedras Negras have in May?

The average length of the day in May in Piedras Negras, Mexico, is 13.6h.

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

In Piedras Negras, the average sunshine in May is 9.3h.

How high is the UV index in May in Piedras Negras?

In Piedras Negras, Mexico, the average daily maximum UV index in May is 7. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in May - Piedras Negras, Mexico
  • Average high temperature in May: 33°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 May: 21.7°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 May - Piedras Negras, Mexico
  • Average pressure in May: 1011.6mbar

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 May - Piedras Negras, Mexico
  • Average wind speed in May: 18.6km/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 May - Piedras Negras, Mexico
  • Average humidity in May: 58%

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

Average rainfall in May - Piedras Negras, Mexico
  • Average rainfall in May: 75mm

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 May - Piedras Negras, Mexico
  • Average rainfall days in May: 11.8 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 May - Piedras Negras, Mexico
  • Average snowfall in May: 0mm

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 May - Piedras Negras, Mexico
  • Average snowfall days in May: 0 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 May / Average sunshine in May - Piedras Negras, Mexico
  • Average daylight in May: 13.6h

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 May: 9.3h

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 May - Piedras Negras, Mexico
  • Average sunshine days in May: 15.8 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 May - Piedras Negras, Mexico
  • Average UV index in May: 7

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 May - Piedras Negras, Mexico
  • Average cloud cover in May: 32

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 May - Piedras Negras, Mexico
  • Average visibility in May: 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).