What’s the climate like in San Juan?
The current climate of San Juan features average monthly temperatures ranging from highs of 35°C during the day to lows of 20°C. The average yearly temperature is around 29°C. At night, temperatures in the colder months average around 6°C and in the warmer months around 22°C.
The highest temperature recorded in San Juan in recent years was 45°C in December 2017. The lowest daytime temperature recorded was 8°C in May 2022.
On average, San Juan receives 703 mm of precipitation each year. For comparison, London gets 701 mm of precipitation annually.
Curious about the climate in other parts of Argentina? Check out the weather and climate in places like Buenos Aires, Patagonia, Ushuaia, or have a look at other destinations in Argentina.
Best time to visit San Juan?
The best time to visit San Juan for sunny weather is January through December. During this period, you'll have good temperatures and not too much rain, making it a great time to visit San Juan.
Climate Table of San Juan
The climate table of San Juan shows the average temperatures, precipitation, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Temp. max (°C) | 35 | 33 | 31 | 28 | 20 | 21 | 21 | 26 | 28 | 31 | 33 | 34 |
| Temp. min (°C) | 22 | 21 | 19 | 17 | 11 | 6 | 6 | 9 | 13 | 17 | 20 | 22 |
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| Precipitation (mm) | 117 | 100 | 75 | 60 | 98 | 11 | 5,8 | 21 | 14 | 25 | 84 | 92 |
| UV Index | 9 | 8 | 7 | 6 | 5 | 5 | 5 | 7 | 8 | 8 | 9 | 9 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 29°C
- Highest temperature: 35°C in January
- Lowest temperature: 20°C in May
- Precipitation: 703 mm per year, averaging 59 mm per month
- Driest months: 5,8 mm in July, 11 mm in June and 14 mm in September
- Wettest months: 117 mm in January, 100 mm in February and 98 mm in May
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Table of Contents
Average Temperature per Month in San Juan
This graph shows the average maximum temperatures per month in San Juan, Argentina. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in San Juan
This graph shows how much precipitation San Juan, Argentina, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average UV Index per Month in San Juan
This graph shows the average UV index per month in San Juan, Argentina. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in San Juan
This graph shows the average yearly temperature in San Juan, Argentina. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in San Juan
This chart shows the total yearly precipitation in San Juan, Argentina, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Weather experiences 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.
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