Normal weather in San Juan in December
The weather in San Juan in December has an average temperature of around 12°C during the day. On average, December sees 19 mm of rain in San Juan. The wind speed is 6 Beaufort and mainly comes from West.
After November, December in San Juan starts with a temperature of 13°C and ends around January at 12°C.
December averages for San Juan
 Average temperature | 12°C |
 Highest daytime temperature | 15°C |
| Lowest daytime temperature | 11°C |
 Total rainfall | 19 mm |
| Rainy days | 14 days |
Temperature per day in December in San Juan
This graph shows the average daily maximum temperatures in December in San Juan, indicated in degrees Celsius.
Precipitation per day in December in San Juan
This graph shows the average daily precipitation in December in San Juan, indicated in millimeters.
UV index per day in December in San Juan
This graph shows the average daily UV index in December in San Juan.
Yearly temperature in December in San Juan
This graph shows the average yearly temperature in December in San Juan, measured in degrees Celsius, over the past years.
Yearly total precipitation in December in San Juan
This graph shows the average yearly precipitation in millimeters in December in San Juan, over the past years.
Average daily weather in December
Click on a day to get more information about the average weather on that day.
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Average weather in San Juan per month
Click on a month below to see in detail how the weather typically is in San Juan and what to expect. Based on the historical weather data of San Juan, you can view the average temperature, precipitation, wind, and UV index for each day of the month.