May weather forecast
San Diego de la Unión, Mexico

May

Weather in May

May, the last month of the spring in San Diego de la Unión, is another warm month, with temperature in the range of an average high of 27.3°C (81.1°F) and an average low of 14.3°C (57.7°F).

Temperature

San Diego de la Unión's warmest temperatures are experienced in May, with average high temperatures of 27.3°C (81.1°F) and lows of 14.3°C (57.7°F).

Heat index

May's average heat index is calculated to be 28°C (82.4°F). With extended exposure and activity, one might feel exhausted and experience heat cramps.
Observations indicate that the heat index values are for shady locations with light wind. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.

Humidity

In May, the average relative humidity in San Diego de la Unión is 49%.

Rainfall

In May, in San Diego de la Unión, the rain falls for 12.9 days. Throughout May, 38mm (1.5") of precipitation is accumulated. Throughout the year, there are 129.7 rainfall days, and 450mm (17.72") of precipitation is accumulated.

Snowfall

February through October and December are months without snowfall.

Daylight

In San Diego de la Unión, the average length of the day in May is 13h and 10min.
On the first day of May, sunrise is at 6:11 am and sunset at 7:09 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:21 pm CST.

Sunshine

In May, the average sunshine in San Diego de la Unión is 9.7h.

UV index

In San Diego de la Unión, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A typical high UV index of 5 in May suggests the following recommendations:
Take precautions - Protection against sunburn is recommended. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.

Frequently asked questions

What is the hottest time of year in San Diego de la Unión?
May, noted for its average high-temperature of 27.3°C (81.1°F) and an average low-temperature of 14.3°C (57.7°F), is considered the warmest month in San Diego de la Unión, Mexico.
What is the average May temperature in San Diego de la Unión?
May temperatures vary between a high-temperature of 27.3°C (81.1°F) and a low-temperature of 14.3°C (57.7°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in May is calculated to be 28°C (82.4°F).
What is the average humidity in May in San Diego de la Unión?
In May, the average relative humidity in San Diego de la Unión, Mexico, is 49%.
How many days does it rain in May in San Diego de la Unión?
In San Diego de la Unión, Mexico, in May, it is raining for 12.9 days, with typically 38mm (1.5") of accumulated precipitation.
When it does not snow in San Diego de la Unión?
In San Diego de la Unión, Mexico, snow does not fall in February through October and December.
What is the average length of the day in May in San Diego de la Unión?
In San Diego de la Unión, Mexico, the average day length in May is 13h and 10min.
When is the sunrise / sunset in May in San Diego de la Unión?
In May, on the first day of the month, sunrise is at 6:11 am and sunset at 7:09 pm. On the last day of the month, in San Diego de la Unión, sunrise is at 6:00 am and sunset at 7:21 pm CST.
How long on average sun shines in May in San Diego de la Unión?
In San Diego de la Unión, Mexico, the average sunshine duration in May is 9.7h.
How high is the UV index in May in San Diego de la Unión?
In San Diego de la Unión, Mexico, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
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 snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in May - San Diego de la Unión, Mexico
Average temperature in May
San Diego de la Unión, Mexico
  • Average high temperature in May: 27.3°C

The warmest month (with the highest average high temperature) is May (27.3°C).
The month with the lowest average high temperature is January (19.3°C).

  • Average low temperature in May: 14.3°C

The month with the highest average low temperature is May (14.3°C).
The coldest month (with the lowest average low temperature) is January (6.3°C).

Average pressure in May - San Diego de la Unión, Mexico
Average pressure in May
San Diego de la Unión, Mexico
  • Average pressure in May: 1013.7mbar

The month with the highest atmospheric pressure is January (1018.7mbar).
The month with the lowest atmospheric pressure is May (1013.7mbar).

Average wind speed in May - San Diego de la Unión, Mexico
Average wind speed in May
San Diego de la Unión, Mexico
  • Average wind speed in May: 9.7km/h

The windiest month (with the highest average wind speed) is April (10.9km/h).
The calmest month (with the lowest average wind speed) is November (9.1km/h).

Average humidity in May - San Diego de la Unión, Mexico
Average humidity in May
San Diego de la Unión, Mexico
  • Average humidity in May: 49%

The month with the highest relative humidity is September (77%).
The month with the lowest relative humidity is April (40%).

Average rainfall in May - San Diego de la Unión, Mexico
Average rainfall in May
San Diego de la Unión, Mexico
  • Average rainfall in May: 38mm

The wettest month (with the highest rainfall) is June (78mm).
The driest month (with the least rainfall) is January (6mm).

Average rainfall days in May - San Diego de la Unión, Mexico
Average rainfall days in May
San Diego de la Unión, Mexico
  • Average rainfall days in May: 12.9 days

The month with the highest number of rainy days is September (17.5 days).
The month with the least rainy days is December (3.5 days).

Average snowfall days in May - San Diego de la Unión, Mexico
Average snowfall days in May
San Diego de la Unión, Mexico
  • Average snowfall days in May: 0 days

The months with the highest number of snowfall days are January and November (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and December (0 days).

Average daylight in May / Average sunshine in May - San Diego de la Unión, Mexico
Average daylight in May /
Average sunshine in May
San Diego de la Unión, 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: 9h and 4min

The month with the most sunshine is December (Average sunshine: 9h and 48min).
The month with the least sunshine is July (Average sunshine: 9h and 6min).

Average sunshine days in May - San Diego de la Unión, Mexico
Average sunshine days in May
San Diego de la Unión, Mexico
  • Average sunshine days in May: 14.4 days

The month with the most sunshine days is December (24.8 days).
The month with the least sunshine days is September (8.5 days).

Average UV index in May - San Diego de la Unión, Mexico
Average UV index in May
San Diego de la Unión, Mexico
  • Average UV index in May: 5

The month with the highest UV index is April (UV index 6).
The months with the lowest UV index are January, October, November and December (UV index 4).

Average cloud cover in May - San Diego de la Unión, Mexico
Average cloud cover in May
San Diego de la Unión, Mexico
  • Average cloud cover in May: 17

The month with the most cloud cover is September (Cloud cover 43).
The months with the least cloud cover are February, March, April and December (Cloud cover 15).

Average visibility in May - San Diego de la Unión, Mexico
Average visibility in May
San Diego de la Unión, Mexico
  • Average visibility in May: 10km

The months with the highest visibility are January, February, March, April, May and December (10km).
The months with the lowest visibility are July, August and September (8km).

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