May weather forecast
San Rafael, Costa Rica

englishespañol中文
Share

Weather in May

Following the trend set by April, May introduces San Rafael to its wet season, evidenced by a rainfall of 367mm (14.45") and rainfall for 29.1 days throughout the month. As the city transitions into the rainy phases, chilly drafts of air pass through slowing down the winds. The sun's presence becomes fairly minimal, and the already shorter sunshine days dip below the previous record. May also marks the onset of the decline in daylight hours. Despite the increase in wet conditions, temperatures remain in the 23°C (73.4°F) high and 16°C (60.8°F) low range as noted in the previous month.

Temperature

San Rafael experiences an average high-temperature of a still warm 23.7°C (74.7°F) with the onset of May, subtly varied from April's 25.3°C (77.5°F). May nights in San Rafael are marked by an average temperature drop to an enjoyable 16.9°C (62.4°F).

Humidity

In San Rafael, the average relative humidity in May is 86%.

Rainfall

In San Rafael, during May, the rain falls for 29.1 days and regularly aggregates up to 367mm (14.45") of precipitation. In San Rafael, during the entire year, the rain falls for 305 days and collects up to 2534mm (99.76") of precipitation.

Daylight

In San Rafael, Costa Rica, the average length of the day in May is 12h and 35min.
On the first day of the month, sunrise is at 05:18 and sunset at 17:48. On the last day of May, in San Rafael, Costa Rica, sunrise is at 05:14 and sunset at 17:54 CST.

Sunshine

In San Rafael, Costa Rica, the average sunshine in May is 7.3h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 5. January through December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 5 in May translates into this advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.

Frequently asked questions

What is the temperature in May in San Rafael?

The high-temperature in San Rafael, Costa Rica, during May is 23.7°C (74.7°F) and the low-temperature is 16.9°C (62.4°F).

What is the average humidity in May in San Rafael?

The average relative humidity in May in San Rafael, Costa Rica, is 86%.

How many days does it rain in May in San Rafael?

In San Rafael, Costa Rica, in May, it is raining for 29.1 days, with typically 367mm (14.45") of accumulated precipitation.

What is the average length of the day in May in San Rafael?

In San Rafael, the average day length in May is 12h and 35min.

When are sunrise and sunset in May in San Rafael?

On the first day of May in San Rafael, sunrise is at 05:18 and sunset at 17:48. On the last day of the month, sunrise is at 05:14 and sunset at 17:54 CST.

How long on average sun shines in May in San Rafael?

The average sunshine duration in May in San Rafael, Costa Rica, is 7.3h.

When is the highest UV index in San Rafael?

January through December, with an average maximum UV index of 5, are months with the highest UV index in San Rafael.

What are the months with the lowest UV index in San Rafael?

January through December, with an average maximum UV index of 5, are months with the lowest UV index in San Rafael.

What is the UV index reading in May in San Rafael?

In San Rafael, Costa Rica, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health 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
San Rafael, Costa Rica

Average temperature in May - San Rafael, Costa Rica
  • Average high temperature in May: 23.7°C

The warmest month (with the highest average high temperature) is April (25.3°C).
The month with the lowest average high temperature is October (22.2°C).

  • Average low temperature in May: 16.9°C

The month with the highest average low temperature is May (16.9°C).
The coldest month (with the lowest average low temperature) is January (13.7°C).

Average pressure in May
San Rafael, Costa Rica

Average pressure in May - San Rafael, Costa Rica
  • Average pressure in May: 1011.3mbar

The month with the highest atmospheric pressure is January (1012.4mbar).
The month with the lowest atmospheric pressure is October (1010.9mbar).

Average wind speed in May
San Rafael, Costa Rica

Average wind speed in May - San Rafael, Costa Rica
  • Average wind speed in May: 4.4km/h

The windiest month (with the highest average wind speed) is February (8.6km/h).
The calmest month (with the lowest average wind speed) is September (3.7km/h).

Average humidity in May
San Rafael, Costa Rica

Average humidity in May - San Rafael, Costa Rica
  • Average humidity in May: 86%

The month with the highest relative humidity is October (90%).
The month with the lowest relative humidity is February (76%).

Average rainfall in May
San Rafael, Costa Rica

Average rainfall in May - San Rafael, Costa Rica
  • Average rainfall in May: 367mm

The wettest month (with the highest rainfall) is October (444mm).
The driest month (with the least rainfall) is February (33mm).

Average rainfall days in May
San Rafael, Costa Rica

Average rainfall days in May - San Rafael, Costa Rica
  • Average rainfall days in May: 29.1 days

The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (14.9 days).

Average daylight in May /
Average sunshine in May
San Rafael, Costa Rica

Average daylight in May / Average sunshine in May - San Rafael, 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 2min

The month with the most sunshine is February (Average sunshine: 9h and 6min).
The month with the least sunshine is October (Average sunshine: 6h and 30min).

Average sunshine days in May
San Rafael, Costa Rica

Average sunshine days in May - San Rafael, Costa Rica
  • Average sunshine days in May: 1.2 days

The month with the most sunshine days is February (10.4 days).
The month with the least sunshine days is October (0.1 days).

Average UV index in May
San Rafael, Costa Rica

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

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

Average cloud cover in May
San Rafael, Costa Rica

Average cloud cover in May - San Rafael, Costa Rica
  • Average cloud cover in May: 55

The month with the most cloud cover is October (Cloud cover 61).
The month with the least cloud cover is February (Cloud cover 31).

Average visibility in May
San Rafael, Costa Rica

Average visibility in May - San Rafael, Costa Rica
  • Average visibility in May: 7km

The months with the highest visibility are January, February and March (9km).
The months with the lowest visibility are September and October (6km).

San Rafael, Costa Rica

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location