May weather forecast
Merida, Mexico

The Santa Ana Church in Merida, Mexico, surrounded by beautiful flowers and palm trees
The Santa Ana Church in Merida, Mexico, surrounded by beautiful flowers and palm trees

May

Weather in May

May continues the pattern of escalating temperatures in Merida. The highest temperature in May can escalate up to 35.4°C (95.7°F), which is the peak temperature Merida experiences during the year. May is characterized by an increased level of humidity and rainfall, heightening the overall heat in the city. Visitors and locals can expect warmer and humid days throughout May. However, evenings can get fairly pleasant with a refreshing breeze.

Temperature

Merida experiences its highest average temperatures in May, reaching a peak of 35.4°C (95.7°F) and a minimum of 24°C (75.2°F).

Heat index

Throughout May, the heat index is estimated at a life-threatening hot 48°C (118.4°F). Eyes open: Heat cramps and heat exhaustion are expected. Prolonged exertion could lead to heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. With 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' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

The months with the lowest humidity are April and May, with an average relative humidity of 63%.

Rainfall

In May, the rain falls for 12.5 days. Throughout May, 43mm (1.69") of precipitation is accumulated. Throughout the year, there are 167.3 rainfall days, and 536mm (21.1") of precipitation is accumulated.

Daylight

The average length of the day in May is 13h and 8min.
On the first day of May, sunrise is at 5:27 am and sunset at 6:23 pm. On the last day of the month, sunrise is at 5:16 am and sunset at 6:35 pm CST.

Sunshine

May has the most sunshine of the year, with an average of 11.1h of sunshine.

UV index

February through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum daily UV index of 7 during May morphs into the following directions:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.

Frequently asked questions

What is the hottest time of year?
In Merida, May is known for its average highest temperatures, reaching a high of 35.4°C (95.7°F) and a low of 24°C (75.2°F).
How hot is it in May?
The average high-temperature and low-temperature in Merida during May are 35.4°C (95.7°F) and 24°C (75.2°F) respectively. In May, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is estimated at 48°C (118.4°F).
What is the least humid month?
April and May, with an average relative humidity of 63%, are the least humid months.
What is the average humidity in May?
The average relative humidity in May is 63%.
How many days does it rain in May in Merida?
In May, the rain falls for 12.5 days. Throughout May, 43mm (1.69") of precipitation is accumulated.
What is the average length of the day in May?
The average day length in May is 13h and 8min.
When are sunrise and sunset in May?
On the first day of May, sunrise is at 5:27 am and sunset at 6:23 pm. On the last day of the month, sunrise is at 5:16 am and sunset at 6:35 pm CST.
What month has the most sunshine?
May has the most sunshine of the year in Merida, with an average of 11.1h of sunshine.
How many hours of sunshine does Merida have in May?
The average sunshine duration in May is 11.1h.
When is the highest UV index?
February through October, with an average maximum UV index of 7, are months with the highest UV index.
What is the UV index reading in May?
The average daily maximum UV index in May in Merida, Mexico, is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in May - Merida, Mexico
Average temperature in May
Merida, Mexico
  • Average high temperature in May: 35.4°C

The warmest month (with the highest average high temperature) is May (35.4°C).
The month with the lowest average high temperature is January (28.1°C).

  • Average low temperature in May: 24°C

The month with the highest average low temperature is June (24.3°C).
The coldest month (with the lowest average low temperature) is January (18.6°C).

Average pressure in May - Merida, Mexico
Average pressure in May
Merida, Mexico
  • Average pressure in May: 1012.3mbar

The month with the highest atmospheric pressure is January (1017.6mbar).
The month with the lowest atmospheric pressure is September (1011.9mbar).

Average wind speed in May - Merida, Mexico
Average wind speed in May
Merida, Mexico
  • Average wind speed in May: 15.2km/h

The windiest month (with the highest average wind speed) is March (16.1km/h).
The calmest month (with the lowest average wind speed) is September (10.6km/h).

Average humidity in May - Merida, Mexico
Average humidity in May
Merida, Mexico
  • Average humidity in May: 63%

The months with the highest relative humidity are September and October (78%).
The months with the lowest relative humidity are April and May (63%).

Average rainfall in May - Merida, Mexico
Average rainfall in May
Merida, Mexico
  • Average rainfall in May: 43mm

The wettest month (with the highest rainfall) is June (99mm).
The driest months (with the least rainfall) are February and March (12mm).

Average rainfall days in May - Merida, Mexico
Average rainfall days in May
Merida, Mexico
  • Average rainfall days in May: 12.5 days

The month with the highest number of rainy days is September (20.4 days).
The months with the least rainy days are February and March (7.2 days).

Average daylight in May / Average sunshine in May - Merida, Mexico
Average daylight in May /
Average sunshine in May
Merida, Mexico
  • Average daylight in May: 13h and 1min

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).

  • Average sunshine in May: 11h and 1min

The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).

Average sunshine days in May - Merida, Mexico
Average sunshine days in May
Merida, Mexico
  • Average sunshine days in May: 15.2 days

The month with the most sunshine days is March (21.8 days).
The month with the least sunshine days is October (8.5 days).

Average UV index in May - Merida, Mexico
Average UV index in May
Merida, Mexico
  • Average UV index in May: 7

The months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, November and December (UV index 6).

Average cloud cover in May - Merida, Mexico
Average cloud cover in May
Merida, Mexico
  • Average cloud cover in May: 26

The month with the most cloud cover is January (Cloud cover 36).
The months with the least cloud cover are March and April (Cloud cover 25).

Average visibility in May - Merida, Mexico
Average visibility in May
Merida, Mexico
  • Average visibility in May: 10km

The months with the highest visibility are February, March, April, May and June (10km).
The month with the lowest visibility is September (8km).

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