May weather forecast
Grecia, Costa Rica

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Weather in May

May marks the height of the wet season in Grecia, with rainfall soaring to its peak at 339mm (13.35"). This climatological shift prompts a surge in humidity up to 82%, contributing to a misty ambience. This month is characterised by a drop in visibility to 8km (5mi) due to increased cloud coverage. Gusty winds calm down, averaging around 4.8km/h (3mph), with the sun usually hidden behind clouds. As a result, outdoor activities may need to be replaced with indoor alternatives.

Temperature

The average high-temperature during May registers at a still warm 27.7°C (81.9°F), closely corresponding to the preceding month. In Grecia, May nights cool down to an average of 19.8°C (67.6°F).

Heat index

The heat index for May is evaluated at a hot 32°C (89.6°F). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.
When referencing the heat index, its values are suitable for shady environments and light breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an estimation of the warmth sensation when considering humidity levels. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are highly critical to babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

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

Rainfall

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

Daylight

The average length of the day in May is 12h and 35min.
On the first day of the month, sunrise is at 05:19 and sunset at 17:49. On the last day of May, sunrise is at 05:14 and sunset at 17:55 CST.

Sunshine

In Grecia, Costa Rica, the average sunshine in May 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 Grecia, Costa Rica. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: An average UV index of 5 in May transforms into this advice:
Take precautions - Protection against sunburn is recommended. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.

Frequently asked questions

What is the temperature in May in Grecia?

An average high-temperature, in May, in Grecia, is 27.7°C (81.9°F) and the average low-temperature is 19.8°C (67.6°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in May is evaluated at 32°C (89.6°F).

What is the average humidity in May in Grecia?

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

How many days does it rain in May in Grecia?

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

How many hours of daylight does Grecia have in May?

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

What time are sunrise and sunset in May in Grecia?

On the first day of May in Grecia, Costa Rica, sunrise is at 05:19 and sunset at 17:49. On the last day of the month, sunrise is at 05:14 and sunset at 17:55 CST.

How long on average sun shines in May in Grecia?

The average sunshine duration in May in Grecia is 7.8h.

What is the month with the lowest UV index in Grecia?

May, August and November, with an average maximum UV index of 5, are months with the lowest UV index in Grecia, Costa Rica.

What is the UV index reading in May in Grecia?

The average daily maximum UV index in May in Grecia is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Grecia, Costa Rica

Average temperature in May - Grecia, 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).

Average pressure in May
Grecia, Costa Rica

Average pressure in May - Grecia, 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).

Average wind speed in May
Grecia, Costa Rica

Average wind speed in May - Grecia, 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).

Average humidity in May
Grecia, Costa Rica

Average humidity in May - Grecia, 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%).

Average rainfall in May
Grecia, Costa Rica

Average rainfall in May - Grecia, 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).

Average rainfall days in May
Grecia, Costa Rica

Average rainfall days in May - Grecia, 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).

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

Average daylight in May / Average sunshine in May - Grecia, 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 30min).

  • 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).

Average sunshine days in May
Grecia, Costa Rica

Average sunshine days in May - Grecia, 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).

Average UV index in May
Grecia, Costa Rica

Average UV index in May - Grecia, 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).

Average cloud cover in May
Grecia, Costa Rica

Average cloud cover in May - Grecia, 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).

Average visibility in May
Grecia, Costa Rica

Average visibility in May - Grecia, 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).

Grecia, Costa Rica

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