ArgentinaWhat’s the climate like in San Juan?
The current climate in San Juan features temperatures ranging from a high of 34°C to a low of 16°C throughout the year. The average yearly temperature is around 26°C. At night, temperatures in the colder months average around 0°C and in the warmer months around 18°C.
The highest temperature recorded in San Juan in recent years was 46°C in December 2023. The lowest daytime temperature recorded was -3°C in September 2016.
On average, San Juan gets 273 mm of precipitation each year. Of this, about 5,5 cm is snowfall. For comparison, New York gets 1142 mm of precipitation each year.
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.
Best time to visit San Juan?
The best time to visit San Juan for sunny weather is January through May and August through December. During this period, you'll have nice temperatures and not too much rain, making it a great time to visit San Juan. In the other months of the year, there's too much rain or the temperature isn't ideal for a visit if you want sunny and pleasant weather.
Climate Table of San Juan
The climate table of San Juan shows the average temperatures, rainfall, snow, and UV index per month. The table provides an overview of the average day and night temperatures in degrees Celsius, the total amount of rainfall in millimeters, the total snowfall in centimeters, and the UV index for each month. Rainfall is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. max (°C) | 34 | 32 | 29 | 25 | 20 | 16 | 16 | 20 | 24 | 27 | 31 | 31 |
| Temp. min (°C) | 18 | 18 | 14 | 10 | 5 | 1 | 0 | 3 | 8 | 11 | 15 | 16 |
| Precipitation |  |
|
|
|
|
|
|
|
|
|
|
|
| Precipitation (mm) | 50 | 44 | 30 | 18 | 12 | 11 | 7,8 | 9,2 | 13 | 21 | 23 | 34 |
| Snow (cm) | 0 | 0 | 0,1 | 0,7 | 0,4 | 2,1 | 1,4 | 0,1 | 0,6 | 0 | 0,1 | 0 |
| UV Index | 10 | 9 | 9 | 7 | 6 | 6 | 6 | 7 | 9 | 9 | 10 | 10 |
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: 26°C
- Highest temperature: 34°C in January
- Lowest temperature: 16°C in June and July
- Precipitation*: 273 mm per year, averaging 23 mm per month
- Snowfall: 5,5 cm per year
- Driest months: 7,8 mm in July, 9,2 mm in August and 11 mm in June
- Wettest months: 50 mm in January, 44 mm in February and 34 mm in December
*Precipitation is measured as a combination of rain, snow, and hail
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 rainfall San Juan, Argentina, gets on average per month. Rainfall 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 rainfall is measured in millimeters, and the average is calculated based on the recorded rainfall per month from past years.
Average Snowfall per Month in San Juan
This graph shows how much snow San Juan, Argentina, gets on average per month. The amount of snowfall is measured in centimeters and the average is calculated based on the recorded snowfall 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 millimeters, is the sum of all the rain that fell in the twelve months of that year.
Total Yearly Snowfall in San Juan
This chart shows the total yearly snowfall in San Juan, Argentina, over the past few years. The total yearly snowfall, measured in centimeters, is the sum of all the snow that fell in the twelve months of that year.
Weather experiences in San Juan
Have you been to San Juan?
Share your weather experiences in San Juan.
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.
Popular destinations in Argentina
Discover the climate of these popular destinations in Argentina.
