Average weather for San Juan in May
It's pleasantly warm in May in San Juan with an average temperature of 20°C. Temperatures this month range from a low of 16°C to a high of 22°C. At night, you can expect temperatures between 2°C and 9°C.
Start of May
The month of May starts in San Juan with warm temps, averaging around 22°C during the day and nights around 8°C. There’s little chance of precipitation. The weather’s mostly sunny and dry.
Mid May
By mid-May, daytime temps drop to around 21°C, with nights around 6°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of May
By the end of May, the average daytime temperature in San Juan is around 18°C, while nighttime temps are about 4°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.
In May, there is an average of 12 mm of precipitation, spread over 4 days. Of the total precipitation, about 0,5 cm falls as snow in May. The wind speed is around 3 Bft, mostly coming from the Southeast.
San Juan in May |
New York | ||
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20°C | 22°C | |
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22°C | 28°C | |
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16°C | -5°C | |
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12 mm | 105 mm | |
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4 days | 14 days | |
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0,5 cm | 0 cm | |
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1 day | 0 days |
UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is May a good time to visit San Juan?
Looking for great weather? May is a good time to be in San Juan. The temperatures are nice, and there’s little chance of rain this month.
Check out the climate of San Juan for all months and discover the best travel time
Curious about the weather in other parts of Argentina? Check out the climate and weather for spots like Buenos Aires, Patagonia, Ushuaia, or explore other destinations in Argentina.
Daily Temperature in May in San Juan
This chart shows the average daily high and low temperatures in May for San Juan, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in May in San Juan
The chart below shows the average daily precipitation in May for San Juan, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 4 days of precipitation in San Juan.
Daily Snowfall in May in San Juan
This chart shows the average daily snowfall in May in San Juan, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in May.
Daily UV index in May in San Juan
This chart shows the average daily UV index in May in San Juan, 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.
Temperature in May in San Juan over the years
This chart shows the average temperature in May in San Juan, measured in degrees Celsius, over the past few years.
Total precipitation in May in San Juan over the years
This chart shows the average precipitation in May in San Juan, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in May in San Juan per year
This chart shows the average snowfall in May in San Juan, measured in centimeters, over the past few years.
Daily weather in May for San Juan
Click on any day in May to get detailed info about the usual weather on that day in San Juan. Check out the historical temperatures and precipitation over the past 10 years on this day.































Weather experiences in May in San Juan
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Average weather in San Juan by month
Click on a month below to see detailed weather info for San Juan. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.