Chetumal
Mexico
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Chetumal, Mexico

May, the last month of the spring, in Chetumal, is another hot month, with average temperature ranging between max 32.7°C (90.9°F) and min 24.6°C (76.3°F).

Temperature

In May, the average high-temperature is practically the same as in April - a still tropical 32.7°C (90.9°F). In May, the average low-temperature is 24.6°C (76.3°F).

Heat index

The average heat index in May is calculated to an extremely hot 44.2°C (111.6°F). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
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 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, pregnancy, metabolic differences), and activity. 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. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Chetumal, the average relative humidity is 74%.

Rainfall

In Chetumal, during 8 rainfall days, 128mm (5") of precipitation is typically accumulated. Throughout the year, in Chetumal, there are 123 rainfall days, and 1307.6mm (51.5") of precipitation is accumulated.

Sea temperature

In May, the average sea temperature in Chetumal, Mexico, is 28.3°C (82.9°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Chetumal, the average length of the day in May is 13h.

Sunshine

The average sunshine in May is 8.9h.

UV index

Months with the highest UV index are March through September, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 12 transform into the following instructions:
Practice all essential precautions. Protection against sun damage is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in May in Chetumal?

In May, in Chetumal, the average high-temperature is 32.7°C (90.9°F), and the average low-temperature is 24.6°C (76.3°F). In May, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that calculates temperature value influenced by the moisture in the air, is evaluated at 44.2°C (111.6°F).

What is the average humidity in May in Chetumal?

In May, the average relative humidity in Chetumal is 74%.

How much does it rain in Chetumal in May?

In Chetumal, Mexico, in May, it is raining for 8 days, with typically 128mm (5") of accumulated precipitation.

What is the sea water temperature in May in Chetumal?

In Chetumal, Mexico, the average seawater temperature in May is 28.3°C (82.9°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in May in Chetumal?

In Chetumal, Mexico, the average length of the day in May is 13h.

How many hours of sunshine does Chetumal have in May?

The average sunshine in May in Chetumal, Mexico, is 8.9h.

What are the months with the highest UV index in Chetumal?

March through September, with an average maximum UV index of 12, are months with the highest UV index.

What is the UV index reading in May in Chetumal?

In May, the average daily maximum UV index in Chetumal is 12. A UV Index of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV rays.
Average temperature in May - Chetumal, Mexico
  • Average high temperature in May: 32.7°C

The warmest month (with the highest average high temperature) is August (32.8°C).
The month with the lowest average high temperature is January (28.5°C).

  • Average low temperature in May: 24.6°C

The month with the highest average low temperature is June (25°C).
The coldest month (with the lowest average low temperature) is January (18.3°C).

Average humidity in May - Chetumal, Mexico
  • Average humidity in May: 74%

Months with the highest relative humidity are January, October, November and December (80%).
The month with the lowest relative humidity is April (73%).

Average rainfall in May - Chetumal, Mexico
  • Average rainfall in May: 128mm

The wettest month (with the highest rainfall) is September (206.8mm).
The driest month (with the lowest rainfall) is March (26.4mm).

Average rainfall days in May - Chetumal, Mexico
  • Average rainfall days in May: 8 days

The month with the highest number of rainy days is September (15.8 days).
Months with the lowest number of rainy days are March and April (3.8 days).

Average sea temperature in May - Chetumal, Mexico
  • Average sea temperature in May: 28.3°C

The best month for swimming (with the highest average sea temperature) is September (29.7°C).
The coldest month (with the lowest average sea temperature) is January (26.2°C).

Average daylight in May / Average sunshine in May - Chetumal, Mexico
  • Average daylight in May: 13h

The month with the longest days is June (Average daylight: 13.2h).
The month with shortest days is December (Average daylight: 11h).

  • Average sunshine in May: 8.9h

The month with most sunshine is April (Average sunshine: 9.1h).
The month with least sunshine is December (Average sunshine: 6.6h).

Average UV index in May - Chetumal, Mexico
  • Average UV index in May: 12

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
Months with the lowest UV index are January, November and December (UV index 8).