Climate Insights for Puerto Rico

The climate in Puerto Rico is warm and mild. The average annual temperature is 21°C and approximately 1754mm of precipitation falls per year. October is the wettest month, receiving around 211mm of rainfall. Puerto Rico is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: January, February, December. The coldest months are June, July, September, when temperatures can drop to 9°C.

Temperatures in Puerto Rico vary considerably across the year, with a 23°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 32°C and the mean temperature sits around 27°C. June is the coolest month, with minimum temperatures around 9°C and an average of 13°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 7°C shift in average temperatures.

Puerto Rico is a fairly wet location, receiving approximately 1754mm of precipitation annually, which averages out to around 146mm per month. The wettest month is October, averaging 211mm of rainfall. March and February also tend to see above-average precipitation. The driest month is June, with just 19mm. That's 192mm less than October, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Puerto Rico is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently winter in Puerto Rico, which began on June 21, 2026. Puerto Rico is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in January at around 32°C, while the coldest stretch bottoms out in June near 9°C. Spring is next, beginning on September 23, 2026 — 63 days from now.

The best time to visit Puerto Rico is during September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 56mm per month. By contrast, January can be uncomfortably hot with highs reaching 32°C, while June is the coldest period with lows dropping to 9°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Puerto Rico 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.