Last updated: August 31, 2025
Discover what October has in store for San Juan, Puerto Rico, where temperatures typically peak at a maximum of 32°C (89°F) and settle at a comfortable average of 27°C (81°F). As the month progresses, nightly lows can dip to around 24°C (75°F), providing pleasant evenings. However, be prepared for frequent rain, as October sees an impressive 145 mm (5.7 in) of precipitation over 22 days. With humidity levels hovering around 78%, October offers a tropical climate that encapsulates the essence of island weather.
In October, San Juan, Puerto Rico experiences warm tropical temperatures that create a delightful atmosphere for visitors. With minimum temperatures around 24°C (75°F) and maximums reaching up to 32°C (89°F), this month maintains a comfortable climate ideal for beachgoers and outdoor explorers. The average temperature hovers around 27°C (81°F), slightly lower than the peak summer months, yet still inviting for sun-seekers. As the island transitions from the summer heat, the warmth remains consistent, making October a wonderful time to experience Puerto Rico’s vibrant culture and stunning landscapes. Overall, the gradual cooling trend hints at the approaching winter months, while still offering plenty of sunshine and pleasant breezes.
October stands out in San Juan, Puerto Rico, as a month of substantial precipitation, with an impressive 145 mm (5.7 in) of rainfall spanning 22 days. This marks a notable decline from September's peak of 173 mm (6.8 in), yet October remains a wet month, contributing to the island's lush landscapes and vibrant ecosystems. The trend of rising rainfall from the beginning of the year culminates in these autumn months, as precipitation builds steadily, peaking in September before tapering off in November. As the transition to the drier season begins, October’s showers not only nourish the region but also set the stage for the pleasant weather that follows.
In October, San Juan, Puerto Rico, experiences a notable shift in humidity levels, averaging 78%, which reflects a gradual decline from the peak summer months. The summer sees humidity levels soar, reaching their highest at 80% in both July and August, illustrating the tropical climate's intensity. Following this, September maintains a sweaty 79% before tapering off into the more temperate autumn months. As the year progresses, humidity levels show a slight decrease through October, setting the stage for the more comfortable conditions of winter, which range from 76% to 78%. This trend indicates that while the air remains humid year-round, October offers a subtle reprieve as the season transitions.
In October, San Juan, Puerto Rico, experiences a UV Index of 12, categorizing it as extreme with a burn time of just 10 minutes. This month marks a slight decline from the peak UV levels seen throughout the summer, yet it remains a crucial period for sun protection. Following a trend of consistently high UV indices since February, October serves as a reminder to remain vigilant against skin damage. With values still in the extreme range, it's essential for residents and visitors alike to take precautions. For a detailed look into the UV Index throughout the year, visit San Juan UV Index.
UV Risk Categories
As October unfolds in San Juan, Puerto Rico, the sunshine continues to shine brightly, offering 313 hours of golden light. This marks a slight dip from the summer peak of 356 hours in May, yet it remains a delightful welcome to the autumn season. The consistency of sunny days from the previous month hints at the region's tropical climate, allowing locals and visitors alike to enjoy outdoor activities and vibrant beach scenes. With October positioned right after a summer filled with over 350 hours of sunshine, residents experience a gentle transition into the cooler months while still basking in the island's warm embrace, making it an ideal time for travel and exploration.
In October, San Juan, Puerto Rico experiences a 49% chance of sunny weather, placing it in a moderate range similar to April and September. This month typically marks the transition towards more favorable conditions, as the likelihood of sunshine begins to recover from the lower percentages seen during the summer months, particularly in June and July, which see only 24% and 43% sunshine, respectively. Notably, the sunny prospects look promising heading into November, where the chance of sun rises to 61%. Thus, October can be viewed as a transitional period, maintaining a balanced opportunity for both sunshine and occasional rain as the island shifts towards its drier season.
In October, San Juan, Puerto Rico, experiences a return to 11 hours of daylight, a pattern reminiscent of the earlier months in the year. This shift follows a peak in daylight hours during the summer, where both June and July bask in 13 hours of sunshine, offering plenty of time for outdoor activities and relaxation. As the year progresses, daylight hours begin to taper off from the vibrant 12 hours seen in March through September. The gradual decrease highlights the island's seasonal rhythm, transitioning from the long golden days of summer to the cooler, shorter days of late fall and winter, while still maintaining a balance of brightness that makes every day in San Juan feel revitalizing.
As October unfolds in San Juan, Puerto Rico, the breeze begins to shift, with an average wind speed of 3.5 m/s (8 mph). This gentle wind follows the trend of a gradual decline from the summer months, where gusts reached up to 5.3 m/s (12 mph) in July. After enjoying a lively summer, the island welcomes a brief respite with calmer winds, signaling the approach of the cooler months. Although October's wind is softer compared to the earlier summer highs, it still carries the intoxicating essence of the tropics, inviting locals and visitors alike to relish in the vibrant autumn atmosphere of this coastal paradise. As the year draws to a close, the winds in San Juan remain a soothing companion, seamlessly blending with the island's rich culture and stunning scenery.
Weather in San Juan varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in San Juan, focusing on differences in temperature, rainfall, humidity, and UV levels.
October and January showcase contrasting weather patterns, reflecting the transition from the wet season to drier conditions. In October, temperatures range from a minimum of 24°C (75°F) to a maximum of 32°C (89°F), coupled with high humidity at 78% and substantial rainfall of 145 mm (5.7 in) over 22 days. In contrast, January experiences milder temperatures, with a minimum of 21°C (69°F) and a maximum of 29°C (85°F), lower humidity at 76%, and significantly reduced precipitation at just 38 mm (1.5 in) over 12 days. This shift indicates a more comfortable and comparatively dry climate in January, making it an ideal time to visit. For more details on January weather, you can check San Juan weather in January.
October and February showcase distinct weather patterns, reflecting the transition from fall to winter. In October, temperatures are warmer, with a minimum of 24°C (75°F) and an average of 27°C (81°F), while humidity is relatively high at 78%. The month also sees considerable rainfall, averaging 145 mm (5.7 in) spread over 22 days, making it one of the wetter months. In contrast, February offers milder temperatures, with a minimum of 21°C (70°F) and an average of 25°C (77°F). It experiences significantly less rainfall, totaling 43 mm (1.7 in) over just 12 days, and a slightly lower humidity level of 75%. For those interested in more details, check out San Juan weather in February.
In comparing the weather of October and March, October tends to be warmer, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 32°C (89°F), while March has slightly cooler averages, with temperatures ranging from 21°C (71°F) to 30°C (86°F). October also experiences higher precipitation, totaling 145 mm (5.7 in) over 22 days, compared to March, which sees only 67 mm (2.6 in) over 14 days. Additionally, October has a higher humidity level at 78%, while March has a more comfortable 74%. For a more detailed look at March weather, you can visit San Juan weather in March.
In comparing the weather of October and April, it's evident that October tends to be slightly warmer, with average temperatures reaching around 27°C (81°F), compared to April's 26°C (78°F). Both months exhibit similar high temperatures, but October experiences significantly more rainfall, with 145 mm (5.7 in) falling over 22 days, while April sees only 56 mm (2.2 in) over just 10 days. The humidity levels are quite comparable, with October at 78% and April slightly lower at 75%. For more information, you can check out San Juan weather in April.
In comparing the weather of October and May, both months feature similar average temperatures, with October experiencing a minimum of 24°C (75°F) and an average of 27°C (81°F), while May has a slightly lower minimum of 23°C (73°F) with the same average of 27°C (80°F). However, October is notably wetter, receiving 145 mm (5.7 in) of precipitation over 22 days, compared to May's 64 mm (2.5 in) across just 13 days. Additionally, October's humidity is slightly higher at 78%, while May maintains a more comfortable level at 75%. For more detailed information about weather in May, you can visit San Juan weather in May.
When comparing the weather in October and June, we see that both months have similar temperature ranges, with minimums around 24°C (75°F), averages of 27°C (81°F), and maximums reaching 32°C (89°F in October and 90°F in June). However, October is noticeably wetter, receiving 145 mm (5.7 in) of precipitation over 22 days, while June sees only 68 mm (2.7 in) across 15 days. Additionally, humidity levels are slightly higher in October at 78%, compared to 77% in June. For a closer look at the weather specifics in June, you can visit San Juan weather in June.
In comparing October and July weather, both months experience similar temperature ranges, with October having a minimum temperature of 24°C (75°F) and an average of 27°C (81°F), while July slightly edges ahead with an average of 28°C (82°F) and a maximum of 32°C (90°F). However, October sees a noticeably higher level of precipitation, totaling 145 mm (5.7 in) over 22 days, compared to July's 87 mm (3.4 in) across 18 days. Humidity levels are also slightly higher in October at 78%, compared to July's 80%. For more detailed information, you can check San Juan weather in July.
In comparing the weather of October and August, we observe that both months feature similar minimum temperatures of around 24°C (75°F), with October experiencing a slightly lower average temperature of 27°C (81°F) compared to August's 28°C (82°F). While the maximum temperatures remain similar at 32°C (89°F) for October and 32°C (90°F) for August, October sees a significant increase in precipitation, totaling 145 mm (5.7 in) over 22 days, compared to August's 99 mm (3.9 in) across 18 days. Humidity levels are also slightly higher in October at 78%, compared to August's 80%. For more details, you can check San Juan weather in August.
October and September exhibit similar temperature ranges, with both months experiencing minimums around 24°C (75°F), but September tends to be slightly warmer on average at 28°C (82°F) compared to October's 27°C (81°F). The maximum temperatures in both months are nearly identical, reaching up to 32°C (89°F) in October and 32°C (90°F) in September. However, October sees a reduction in precipitation, totaling 145 mm (5.7 in) over 22 days, compared to September’s 173 mm (6.8 in) over 23 days. Humidity remains comparable as well, with October at 78% and September at 79%. For more details on September's weather, you can explore San Juan weather in September.
In October, temperatures in San Juan range from a minimum of 24°C (75°F) to a maximum of 32°C (89°F), with an average of 27°C (81°F). The month experiences significant rainfall, with 145 mm (5.7 in) of precipitation over 22 days, accompanied by a consistent humidity of 78%. In contrast, November sees slightly cooler temperatures, with a minimum of 23°C (74°F) and a maximum of 31°C (87°F), averaging 26°C (80°F). Rainfall decreases to 106 mm (4.2 in) over 16 days, while humidity remains steady at 78%. For a more detailed look at the weather conditions in November, you can visit San Juan weather in November.
October and December display relatively similar weather patterns, with only slight variations in temperature and precipitation. In October, temperatures range from a minimum of 24°C (75°F) to a maximum of 32°C (89°F), with an average of 27°C (81°F) and a higher precipitation level of 145 mm (5.7 in) over 22 days, contributing to a humidity of 78%. In contrast, December sees slightly cooler temperatures, with a minimum of 23°C (73°F) and a maximum of 31°C (87°F), averaging 26°C (78°F). Precipitation drops significantly to 51 mm (2.0 in) over 16 days, and humidity decreases slightly to 76%. For more detailed information about December weather, check out San Juan weather in December.
October in San Juan brings a noticeable shift in weather patterns compared to other months. With temperatures remaining warm yet slightly cooler than the peak summer heat, the city experiences a blend of balmy days and humid nights. However, this month also marks a transition into the rainy season, leading to an increase in precipitation and over half the days seeing some form of rain. As a result, residents and visitors can expect a mix of sun and clouds, making it essential to stay prepared for occasional showers. Overall, October offers a unique blend of warmth and moisture that sets it apart, perfect for those who enjoy the lushness of Puerto Rico during this vibrant time. For more details on what to expect throughout the year, visit our page on San Juan Climate.