May weather forecast
Atenas, Costa Rica

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Weather in May

May in Atenas, Costa Rica, is notably wet, with the city registering maximum rainfall values of up to 339mm (13.35"). This is mainly due to the onset of the rainy season. During this period, the city experiences a distinct drop in sunshine hours and a rise in relative humidity. The average temperatures show little fluctuations from those of the previous month, making the climate moderately warm. However, the heightened rainfall paired with the increased humidity levels result in an overall misty and damp weather.

Temperature

April's transformation into May witnesses an average high-temperature of a still warm 27.7°C (81.9°F) in Atenas, noting a minor change from the preceding month. Atenas records a consistent low-temperature of 19.8°C (67.6°F) during May nights.

Heat index

The heat index for May is evaluated at a hot 32°C (89.6°F). Constant activity during exposure could result in a state of weariness and possibly heat cramps.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', comes about by integrating the temperature readings with the humidity levels. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance 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.

Humidity

The average relative humidity in May in Atenas is 82%.

Rainfall

In Atenas, during May, the rain falls for 27.2 days and regularly aggregates up to 339mm (13.35") of precipitation. Throughout the year, there are 272 rainfall days, and 2217mm (87.28") of precipitation is accumulated.

Daylight

In May, the average length of the day is 12h and 35min.
On the first day of May in Atenas, sunrise is at 05:19 and sunset at 17:49. On the last day of the month, sunrise is at 05:15 and sunset at 17:55 CST.

Sunshine

In May, the average sunshine in Atenas is 7.8h.

UV index

May, August and November, with an average maximum UV index of 5, are months with the lowest UV index in Atenas. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: During May, 5 as the daily maximum UV index converts into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What are May temperatures in Atenas?

Atenas in May has an average high-temperature of 27.7°C (81.9°F) and an average low-temperature of 19.8°C (67.6°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in May is evaluated at 32°C (89.6°F).

What is the average humidity in May in Atenas?

In Atenas, Costa Rica, the average relative humidity in May is 82%.

How many days does it rain in May in Atenas?

In May, in Atenas, the rain falls for 27.2 days. Throughout May, 339mm (13.35") of precipitation is accumulated.

How many hours of daylight does Atenas have in May?

The average day length in May is 12h and 35min.

When is the sunrise / sunset in May in Atenas?

On the first day of May in Atenas, Costa Rica, sunrise is at 05:19 and sunset at 17:49. On the last day of the month, sunrise is at 05:15 and sunset at 17:55 CST.

How many hours of sunshine does Atenas have in May?

In May, the average sunshine duration in Atenas, Costa Rica, is 7.8h.

What are the months with the lowest UV index in Atenas?

The months with the lowest UV index in Atenas are May, August and November, with an average maximum UV index of 5.

How high is the UV index in May in Atenas?

In May, the average daily maximum UV index in Atenas, Costa Rica, is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Atenas, Costa Rica

Average temperature in May - Atenas, Costa Rica
  • Average high temperature in May: 27.7°C

The warmest months (with the highest average high temperature) are March and April (29.7°C).
The month with the lowest average high temperature is October (25.4°C).

  • Average low temperature in May: 19.8°C

The month with the highest average low temperature is May (19.8°C).
The coldest month (with the lowest average low temperature) is January (16.8°C).

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Average pressure in May
Atenas, Costa Rica

Average pressure in May - Atenas, Costa Rica
  • Average pressure in May: 1011mbar

The month with the highest atmospheric pressure is January (1012.1mbar).
The month with the lowest atmospheric pressure is October (1010.7mbar).

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Average wind speed in May
Atenas, Costa Rica

Average wind speed in May - Atenas, Costa Rica
  • Average wind speed in May: 4.8km/h

The windiest month (with the highest average wind speed) is February (10.6km/h).
The calmest month (with the lowest average wind speed) is September (3.8km/h).

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Average humidity in May
Atenas, Costa Rica

Average humidity in May - Atenas, Costa Rica
  • Average humidity in May: 82%

The month with the highest relative humidity is October (89%).
The month with the lowest relative humidity is March (70%).

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Average rainfall in May
Atenas, Costa Rica

Average rainfall in May - Atenas, Costa Rica
  • Average rainfall in May: 339mm

The wettest month (with the highest rainfall) is October (396mm).
The driest month (with the least rainfall) is February (17mm).

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Average rainfall days in May
Atenas, Costa Rica

Average rainfall days in May - Atenas, Costa Rica
  • Average rainfall days in May: 27.2 days

The month with the highest number of rainy days is October (30.2 days).
The month with the least rainy days is February (10.3 days).

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Average daylight in May /
Average sunshine in May
Atenas, Costa Rica

Average daylight in May / Average sunshine in May - Atenas, Costa Rica
  • Average daylight in May: 12h and 4min

The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).

  • Average sunshine in May: 7h and 5min

The month with the most sunshine is March (Average sunshine: 9h and 24min).
The month with the least sunshine is October (Average sunshine: 7h and 0min).

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Average sunshine days in May
Atenas, Costa Rica

Average sunshine days in May - Atenas, Costa Rica
  • Average sunshine days in May: 2.8 days

The month with the most sunshine days is January (16.7 days).
The month with the least sunshine days is September (0.5 days).

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Average UV index in May
Atenas, Costa Rica

Average UV index in May - Atenas, Costa Rica
  • Average UV index in May: 5

The months with the highest UV index are January, February, March, April, June, July, September, October and December (UV index 6).
The months with the lowest UV index are May, August and November (UV index 5).

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Average cloud cover in May
Atenas, Costa Rica

Average cloud cover in May - Atenas, Costa Rica
  • Average cloud cover in May: 46

The month with the most cloud cover is October (Cloud cover 54).
The month with the least cloud cover is February (Cloud cover 19).

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Average visibility in May
Atenas, Costa Rica

Average visibility in May - Atenas, Costa Rica
  • Average visibility in May: 8km

The months with the highest visibility are February and March (10km).
The months with the lowest visibility are August, September, October and November (7km).

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Atenas, Costa Rica

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