May weather forecast and climate
Havana, Cuba

The front yard of the Gran Teatro in Havana, Cuba, with a display of colored vintage cars
The front yard of the Gran Teatro in Havana, Cuba, with a display of colored vintage cars
May, the last month of the spring, in Havana, is also a moderately hot month, with average temperature ranging between max 29.8°C (85.6°F) and min 22.4°C (72.3°F).

Temperature

In May, the average high-temperature is relatively the same as in April - a still warm 29.8°C (85.6°F). In Havana, the average low-temperature is 22.4°C (72.3°F).

Heat index

In May, the average heat index is evaluated at a sweltering 35.8°C (96.4°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 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, wind, pregnancy, and metabolic differences affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. 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 surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in Havana is 75%.

Rainfall

In Havana, during 6 rainfall days, 98mm (3.86") of precipitation is typically accumulated. Throughout the year, there are 80 rainfall days, and 1189.2mm (46.82") of precipitation is accumulated.

Sea temperature

In Havana, the average seawater temperature is 27.7°C (81.9°F).
Note: 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.

Daylight

In May, the average length of the day is 13.3h.

Sunshine

In May, the average sunshine is 9h.

UV index

April through June, with an average maximum UV index of 12, are months with the highest UV index in Havana. A UV Index of 11, and more, symbolizes an extreme threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 12 transform into the following instructions:
Take all required precautions, as unprotected skin and eyes can burn in minutes. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in May in Havana?

In May, in Havana, the average high-temperature is 29.8°C (85.6°F), and the average low-temperature is 22.4°C (72.3°F). In May, the average heat index (a.k.a. 'felt air temperature', 'feels like'), that combines air temperature and relative humidity, is estimated at 35.8°C (96.4°F).

What is the average humidity in May in Havana?

In May, the average relative humidity in Havana is 75%.

How much does it rain in Havana in May?

In Havana, during May, the rain falls for 6 days and regularly aggregates up to 98mm (3.86") of precipitation.

What is the water temperature in May in Havana?

In May, the average sea temperature in Havana, Cuba, is 27.7°C (81.9°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 Havana?

In Havana, the average length of the day in May is 13.3h.

How long on average sun shines in May in Havana?

In Havana, the average sunshine in May is 9h.

What is the month with the highest UV index in Havana?

April through June, with an average maximum UV index of 12, are months with the highest UV index.

What is the UV index intensity in May in Havana?

In May, the average daily maximum UV index in Havana is 12. A UV Index estimate of 11, and higher, represents an extreme health threat from unprotected exposure to the UV radiation.
Average temperature in May - Havana, Cuba
  • Average high temperature in May: 29.8°C

The warmest month (with the highest average high temperature) is August (31.6°C).
The month with the lowest average high temperature is January (25.8°C).

  • Average low temperature in May: 22.4°C

The month with the highest average low temperature is August (24.1°C).
The coldest months (with the lowest average low temperature) are January and February (18.6°C).

Average humidity in May - Havana, Cuba
  • Average humidity in May: 75%

The month with the highest relative humidity is October (80%).
The month with the lowest relative humidity is April (72%).

Average rainfall in May - Havana, Cuba
  • Average rainfall in May: 98mm

The wettest month (with the highest rainfall) is June (182.3mm).
The driest month (with the least rainfall) is March (46.2mm).

Average rainfall days in May - Havana, Cuba
  • Average rainfall days in May: 6 days

The month with the highest number of rainy days is October (11 days).
Months with the least rainy days are March and April (3 days).

Average sea temperature in May - Havana, Cuba
  • Average sea temperature in May: 27.7°C

The best month for swimming (with the highest average sea temperature) is August (30.2°C).
The coldest month (with the lowest average sea temperature) is January (24.7°C).

Average daylight in May / Average sunshine in May - Havana, Cuba
  • Average daylight in May: 13.3h

The month with the longest days is June (Average daylight: 13.5h).
The month with the shortest days is December (Average daylight: 10.7h).

  • Average sunshine in May: 9h

The month with the most sunshine is September (Average sunshine: 10h).
Months with the least sunshine are January, February, November and December (Average sunshine: 7).

Average UV index in May - Havana, Cuba
  • Average UV index in May: 12

Months with the highest UV index are April, May and June (UV index 12).
Months with the lowest UV index are January and December (UV index 6).