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Costa RicaThe weather in May in Arenal
It's hot in May in Arenal with an average temperature of 34°C. Temperatures this month range from a low of 32°C to a high of 35°C. At night, you can expect temperatures between 24°C and 25°C.
Looking for sun? May isn’t a good month to be in Arenal. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for Arenal, Costa Rica. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 38°C in 2019, Arenal reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 24°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 20°C to a highest value of 27°C.
Rainfall amount
In May, there is an average of 212 mm of precipitation, spread over 21 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Daily weather in May for Arenal
Click on any day in May to get detailed info about the usual weather on that day in Arenal. Check out the historical temperatures and precipitation over the past 10 years on this day.
May weather comparison
| Arenal | New York | |
|---|---|---|
| Average temperature | 34°C | 22°C |
| Max. temperature | 35°C | 28°C |
| Min. temperature | 24°C | -5°C |
| Total precipitation | 212 mm | 105 mm |
| Rainy days | 21 days | 14 days |
Start of May
The month of May starts in Arenal with hot temps, averaging around 35°C during the day and nights around 25°C.
Mid May
By mid-May, daytime temps drop to around 34°C, with nights around 25°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of May
By the end of May, the average daytime temperature in Arenal is around 33°C, while nighttime temps are about 25°C. There’s a significant chance of many days with precipitation.
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UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
The hurricane season in Arenal runs from June to November.
Check out the climate of Arenal for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in May in Arenal, Costa Rica. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in May in Arenal
Temperature in May in Arenal over the years
Precipitation charts
These charts show the average amount of precipitation in May in Arenal, Costa Rica. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in May in Arenal
Total precipitation in May in Arenal over the years
Daily UV index in May in Arenal
This chart shows the average daily UV index in May in Arenal, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in May in Arenal
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Average weather in Arenal by month
Click on a month below to see detailed weather info for Arenal. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.