May weather forecast
Chetumal, Mexico

The last month of the spring, May, is another hot month in Chetumal, Mexico, with temperature in the range of an average low of 24.8°C (76.6°F) and an average high of 31.8°C (89.2°F).

Temperature

The yearly peak temperatures occur in May and August, averaging a high-temperature of 31.8°C (89.2°F).

Heat index

In May, the average heat index is computed to be a scorching 42°C (107.6°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Note that heat index values are valued for light wind and location in the shade. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
By perspiring, the human body can shed its excessive warmth since evaporated sweat cools it off. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

The average relative humidity in May in Chetumal is 76%.

Rainfall

In Chetumal, during May, the rain falls for 16.3 days and regularly aggregates up to 53mm (2.09") of precipitation. Throughout the year, in Chetumal, Mexico, there are 198.4 rainfall days, and 752mm (29.61") of precipitation is accumulated.

Sea temperature

In May, the average sea temperature is 28.3°C (82.9°F).
Note: Engaging in water activities, such as swimming or diving, in temperatures from 25°C (77°F) to 29°C (84.2°F) is very pleasurable for extended periods, without any discomfort.

Daylight

In Chetumal, Mexico, the average length of the day in May is 13h and 1min.
On the first day of the month, sunrise is at 6:25 am and sunset at 7:15 pm. On the last day of May, in Chetumal, Mexico, sunrise is at 6:15 am and sunset at 7:26 pm EST.

Sunshine

In May, the average sunshine is 8.5h.

UV index

The months with the highest UV index are March through July and September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: In May, the maximum UV index of 7 translates into these guidelines:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Alert! The Sun's UV rays are heightened by the reflection of sand and water.