Climate Insights for San Juan

The climate in San Juan is hot. The average annual temperature is 26°C and approximately 3,037 mm of precipitation falls per year. San Juan receives a notable amount of rainfall throughout the year, including during its driest month. San Juan sits near the equator, so seasonal temperature differences are minimal throughout the year.The climate in San Juan is hot. The average annual temperature is 79°F and approximately 119.6 in of precipitation falls per year. San Juan receives a notable amount of rainfall throughout the year, including during its driest month. San Juan sits near the equator, so seasonal temperature differences are minimal throughout the year.

San Juan has relatively stable temperatures year-round, staying within a 9°C range. The warmest month is February, when average highs reach 32°C and the mean temperature sits around 27°C. July is the coolest month, with minimum temperatures around 23°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.San Juan has relatively stable temperatures year-round, staying within a 17°F range. The warmest month is February, when average highs reach 90°F and the mean temperature sits around 81°F. July is the coolest month, with minimum temperatures around 73°F and an average of 77°F. Daily temperature variation is modest, with an average difference of 14°F between highs and lows.

San Juan is a very wet location, receiving approximately 3,037 mm of precipitation annually, which averages out to around 253 mm per month. The wettest month is June, averaging 445 mm of rainfall. July and May also tend to see above-average precipitation. The driest month is February, with just 92 mm. That's 353 mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.San Juan is a very wet location, receiving approximately 119.6 in of precipitation annually, which averages out to around 10 in per month. The wettest month is June, averaging 17.5 in of rainfall. July and May also tend to see above-average precipitation. The driest month is February, with just 3.6 in. That's 13.9 in less than June, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

San Juan is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.San Juan is relatively calm, with an average annual wind speed of 3mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is February, averaging 3mph, though still comfortable for most outdoor activities. The calmest conditions occur in November, with average winds dropping to 2mph, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1mph between the calmest and windiest months.

The table below shows monthly climate averages for San Juan based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for San Juan based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.