May weather forecast
San Juan, Argentina

englishespañol中文
Share

Weather in May

Further deepening into autumn, May brings an appreciable reduction in temperatures. The weather favours the onset of winter as the highest daily temperatures only go up to an average of 19°C (66.2°F). Despite a reduction in the UV index to 3, daylight hours still remain sufficient for outdoor activities. Residents prepare for the coming winter month, as the daily wind speed picks up to an average of 8.8km/h (5.5mph). However, the rain offers little concern, with an infrequent downpour adding only 2mm (0.08") of precipitation this month.

Temperature

May in San Juan brings a slight decrease in the average high-temperature, shifting from a pleasant 22.9°C (73.2°F) in April to a refreshing 19°C (66.2°F). Throughout the month of May, San Juan witnesses an average temperature of 9.2°C (48.6°F).

Humidity

April and May, with an average relative humidity of 52%, are the most humid months.

Rainfall

In San Juan, during May, the rain falls for 2.3 days and regularly aggregates up to 2mm (0.08") of precipitation. In San Juan, Argentina, during the entire year, the rain falls for 50.2 days and collects up to 94mm (3.7") of precipitation.

Snowfall

January through June, October through December are months without snowfall.

Daylight

In May, the average length of the day in San Juan is 10h and 31min.
On the first day of May, sunrise is at 08:05 and sunset at 18:56. On the last day of the month, sunrise is at 08:25 and sunset at 18:38 -03.

Sunshine

March through May and October, with an average of 9.7h of sunshine, are months with the least sunshine in San Juan.

UV index

The months with the lowest UV index are May through July, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 3 during May translates into these guidelines:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.

Frequently asked questions

What are the temperatures in San Juan in May?

The high-temperature, in May, in San Juan, records 19°C (66.2°F), while the low-temperature is 9.2°C (48.6°F). In February, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is calculated to be 29°C (84.2°F).

What is the most humid month in San Juan?

The months with the highest humidity in San Juan are April and May, with an average relative humidity of 52%.

What is the average humidity in May in San Juan?

The average relative humidity in May in San Juan is 52%.

How much does it rain in San Juan in May?

In San Juan, in May, during 2.3 rainfall days, 2mm (0.08") of precipitation is typically accumulated.

When it does not snow in San Juan?

In San Juan, Argentina, snow does not fall in January through June, October through December.

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

In San Juan, the average day length in May is 10h and 31min.

When is the sunrise / sunset in May in San Juan?

On the first day of May in San Juan, Argentina, sunrise is at 08:05 and sunset at 18:56. On the last day of the month, sunrise is at 08:25 and sunset at 18:38 -03.

What is the month with the least sunshine in San Juan?

March through May and October, with an average of 9.7h of sunshine, are months with the least sunshine in San Juan, Argentina.

How many hours of sunshine does San Juan have in May?

In San Juan, the average sunshine duration in May is 9.7h.

When is the lowest UV index in San Juan?

The months with the lowest UV index in San Juan are May through July, with an average maximum UV index of 3.

What is the UV index intensity in May in San Juan?

In San Juan, Argentina, the average daily maximum UV index in May is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in May
San Juan, Argentina

Average temperature in May - San Juan, Argentina
  • Average high temperature in May: 19°C

The warmest month (with the highest average high temperature) is January (30.6°C).
The month with the lowest average high temperature is July (14.6°C).

  • Average low temperature in May: 9.2°C

The month with the highest average low temperature is January (19.4°C).
The coldest month (with the lowest average low temperature) is July (4.5°C).

Average pressure in May
San Juan, Argentina

Average pressure in May - San Juan, Argentina
  • Average pressure in May: 1016.4mbar

The month with the highest atmospheric pressure is July (1018.1mbar).
The month with the lowest atmospheric pressure is December (1010.2mbar).

Average wind speed in May
San Juan, Argentina

Average wind speed in May - San Juan, Argentina
  • Average wind speed in May: 8.8km/h

The windiest months (with the highest average wind speed) are October and November (12.2km/h).
The calmest month (with the lowest average wind speed) is May (8.8km/h).

Average humidity in May
San Juan, Argentina

Average humidity in May - San Juan, Argentina
  • Average humidity in May: 52%

The months with the highest relative humidity are April and May (52%).
The month with the lowest relative humidity is November (35%).

Average rainfall in May
San Juan, Argentina

Average rainfall in May - San Juan, Argentina
  • Average rainfall in May: 2mm

The wettest month (with the highest rainfall) is January (29mm).
The driest months (with the least rainfall) are June and July (1mm).

Average rainfall days in May
San Juan, Argentina

Average rainfall days in May - San Juan, Argentina
  • Average rainfall days in May: 2.3 days

The month with the highest number of rainy days is January (9.2 days).
The month with the least rainy days is August (1.3 days).

Average snowfall in May
San Juan, Argentina

Average snowfall in May - San Juan, Argentina
  • Average snowfall in May: 0mm

The month with the highest snowfall is July (4mm).
The months with the least snowfall are January, February, March, April, May, June, October, November and December (0mm).

Average snowfall days in May
San Juan, Argentina

Average snowfall days in May - San Juan, Argentina
  • Average snowfall days in May: 0 days

The months with the highest number of snowfall days are July and September (0.4 days).
The months with the least snowfall days are January, February, March, April, May, June, October, November and December (0 days).

Average daylight in May /
Average sunshine in May
San Juan, Argentina

Average daylight in May / Average sunshine in May - San Juan, Argentina
  • Average daylight in May: 10h and 3min

The month with the longest days is December (Average daylight: 14h and 12min).
The month with the shortest days is June (Average daylight: 10h and 6min).

  • Average sunshine in May: 9h and 4min

The months with the most sunshine are August, September and November (Average sunshine: 9h and 54min).
The months with the least sunshine are March, April, May and October (Average sunshine: 9h and 42min).

Average sunshine days in May
San Juan, Argentina

Average sunshine days in May - San Juan, Argentina
  • Average sunshine days in May: 28.2 days

The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is January (15.4 days).

Average UV index in May
San Juan, Argentina

Average UV index in May - San Juan, Argentina
  • Average UV index in May: 3

The month with the highest UV index is January (UV index 7).
The months with the lowest UV index are May, June and July (UV index 3).

Average cloud cover in May
San Juan, Argentina

Average cloud cover in May - San Juan, Argentina
  • Average cloud cover in May: 12

The months with the most cloud cover are March, April and May (Cloud cover 12).
The month with the least cloud cover is August (Cloud cover 8).

Average visibility in May
San Juan, Argentina

Average visibility in May - San Juan, Argentina
  • Average visibility in May: 10km

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

San Juan, Argentina

Weather forecast for your location

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