Last updated: August 31, 2025
In August, Isabela, Puerto Rico, experiences a tropical climate characterized by warm temperatures and considerable rainfall. With a maximum temperature reaching 32°C (89°F) and an average of 27°C (82°F), daily weather remains comfortably warm, while nights cool down to a pleasant minimum of 24°C (76°F). This month witnesses high humidity levels averaging around 80%, contributing to the lush, vibrant landscapes typical of the region. August also sees significant precipitation, totaling 97 mm (3.8 in) over approximately 20 rainy days, highlighting the need for travelers to prepare for occasional showers amidst their outdoor adventures. Visitors to Isabela can expect a mix of sun and rain as they explore the island's breathtaking beauty.
In August, Isabela, Puerto Rico, basks in warm tropical temperatures that reflect the peak of summer. During this month, the minimum temperature hovers around 24°C (76°F), while the average climbs to a pleasant 27°C (82°F). The days can get quite warm, with maximum temperatures reaching up to 32°C (89°F), making it ideal for beachgoers and outdoor enthusiasts seeking the sun. August shares a similar warmth with the preceding months, showing a slight upward trend in maximum temperatures, which typically peak in this vibrant summer month. With consistent heat and the allure of cooling ocean breezes, August is a perfect time to explore Isabela's stunning coastline and lush landscapes.
In August, Isabela, Puerto Rico, experiences a significant peak in precipitation, mirroring the rainy season's intensity. With a precipitation amount of 97 mm (3.8 in) over 20 days, August not only matches May's totals but also continues the upward trend observed since June. This month stands out as a precursor to September, which plunges into even heavier rainfall at 188 mm (7.4 in). The steady increase in rainfall days, reaching their highest count in August, underscores the region's transition toward its wettest months ahead, emphasizing the lush vibrancy that characterizes Isabela’s tropical environment during this time.
In Isabela, Puerto Rico, August brings a consistent and notable 80% humidity, mirroring the levels seen in July. This pattern suggests a peak in moisture during the summer months, enveloping the region in a tropical embrace. As the year progresses from January's more moderate 76% humidity to the high summer figures, you can observe a gradual increase, emphasizing the lush and verdant landscape characteristic of this Caribbean locale. Following August, humidity begins to taper slightly, settling to 79% in September and maintaining a relatively humid atmosphere through the fall. This trend highlights the region's warm, tropical climate, making Isabela a captivating destination for those who thrive on vibrant, humid environments.
In Isabela, Puerto Rico, the UV Index remains consistently high throughout August, registering at 13, which falls into the extreme exposure category. As summer reaches its peak, sun-seekers should be cautious, as the burn time is a mere 10 minutes. The trend in recent months showcases a persistent pattern of extreme UV levels, extending from February to October, with only brief dips in the winter months, making it essential for residents and visitors alike to take protective measures. To learn more about the UV Index throughout the year, check out the detailed information at Isabela UV Index.
UV Risk Categories
Isabela, Puerto Rico basks in an abundance of sunshine throughout the year, with August enjoying an impressive 352 hours of sun. This vibrant month falls in line with the trend of the summer season, where both June and July also boast 352 and 361 hours respectively. The sunshine begins to peak in late spring with 361 hours in May, creating the perfect backdrop for beach outings and outdoor adventures. Interestingly, as summer transitions into fall, there’s a slight decrease in sunlight, but September still delivers a generous 316 hours. Overall, the pattern showcases a sunny paradise that promises plenty of bright days, enticing visitors to revel in its warm, sun-soaked ambiance.
In Isabela, Puerto Rico, the likelihood of sunny weather in August stands at 47%, reflecting a trend seen throughout the summer months. As the year progresses from the vibrant optimism of February's 77% sunshine, the later months bring a noticeable dip in clear skies, with June seeing the lowest probability at 31%. July's modest increase to 47% sets a similar stage for August, maintaining that same level of sunshine chance. The fluctuations suggest that while summer can be a mixed bag, visitors can still enjoy occasional sunny days amidst the tropical heat, with the promise of more consistent sunshine returning as we move into the early fall.
In Isabela, Puerto Rico, the daylight duration showcases a delightful rhythm throughout the year. As summer peaks in June and July, residents bask in 13 hours of sunlight, enhancing outdoor activities and vibrant gatherings. August marks a gentle transition, with daylight reverting to 12 hours, mirroring the lengths seen in both March and April; this shift signals the approach of fall while still offering plenty of bright days. Following August, daylight remains steady at 12 hours in September before gradually tapering back to 11 hours by October. This pattern reflects a natural ebb and flow, making each season's light a cherished part of life in this beautiful coastal town.
In Isabela, Puerto Rico, the August winds exhibit a gentle consistency akin to the month's tropical charm, with an average speed of 5.0 m/s (11 mph). This is a stabilizing dip from the earlier summer months, where winds reach their peak in July at 5.3 m/s (12 mph). As summer transitions to fall, the winds gradually decrease, foreshadowing the cooler breezes of late autumn. By September, the average plummets to 3.7 m/s (8 mph), highlighting a trend of diminishing gusts as the year wanes. Throughout the year, aside from a brief uptick in December to 5.4 m/s (12 mph), August stands as one of those tranquil periods where the winds are just strong enough to carry the delightful scent of the sea, making it a perfect time for leisurely exploration of Isabela’s stunning coastline.
Weather in Isabela varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Isabela, focusing on differences in temperature, rainfall, humidity, and UV levels.
In August, temperatures are typically warmer, with lows around 24°C (76°F) and highs reaching up to 32°C (89°F), while January experiences milder conditions, with minimum temperatures of 20°C (69°F) and maximums of 29°C (84°F). August also sees significantly more rainfall, averaging 97 mm (3.8 in) across about 20 days, compared to January's 34 mm (1.3 in) over 11 days. Humidity is slightly higher in August at 80%, compared to 76% in January, making August feel more tropical. For a detailed look at the weather in January, you can check Isabela weather in January.
August and February offer contrasting weather conditions. In August, temperatures range from a minimum of 24°C (76°F) to a maximum of 32°C (89°F), with an average of 27°C (82°F). This month experiences significant humidity at 80% and considerable rainfall, totaling 97 mm (3.8 inches) over 20 days. In contrast, February is slightly cooler, with temperatures ranging from 21°C (69°F) to 30°C (86°F), and an average of 25°C (76°F). It has lower humidity at 75% and less precipitation, totaling just 39 mm (1.5 inches) over 13 days. For a closer look at the weather specifics, you can check Isabela weather in February.
In comparing the weather between August and March, it's evident that August tends to be hotter and more humid. With temperatures ranging from a minimum of 24°C (76°F) to a maximum of 32°C (89°F) and an average of 27°C (82°F), August also sees a high level of humidity at 80%. Additionally, it experiences more precipitation, with 97 mm (3.8 in) spread over 20 days. In contrast, March offers slightly cooler temperatures, with a minimum of 21°C (70°F), an average of 25°C (76°F), and a maximum of 29°C (84°F). The month receives less rainfall, totaling 72 mm (2.8 in) over 17 days, accompanied by a lower humidity level of 74%. For more detailed insights on the weather during this time, you can explore Isabela weather in March.
When comparing the weather in August and April, it's clear that August tends to be warmer and more humid. August temperatures range from a minimum of 24°C (76°F) to a maximum of 32°C (89°F), with an average of 27°C (82°F). In contrast, April features slightly cooler temperatures, with a minimum of 22°C (72°F) and a maximum of 30°C (86°F), averaging 25°C (78°F). Precipitation also differs, as August receives 97 mm (3.8 in) of rain over 20 days, while April has only 66 mm (2.6 in) over 14 days. Lastly, the humidity level in August is higher at 80%, compared to 75% in April. For more detailed information, you can refer to Isabela weather in April.
In comparing the weather between August and May, both months experience warm temperatures, but August tends to be slightly warmer overall. August boasts an average temperature of 27°C (82°F) with maximums reaching 32°C (89°F), compared to May’s average of 26°C (79°F) and maximums of 31°C (88°F). Interestingly, both months receive the same amount of precipitation at 97 mm (3.8 in), but August sees rain on more days—20 compared to May's 19 days. Additionally, humidity is higher in August at 80%, compared to 75% in May, making August feel muggier. For a closer look at the weather specifics in May, you can visit Isabela weather in May.
When comparing the weather in August and June, both months feature similar temperature ranges, with minimums around 24°C (76°F) and average highs reaching approximately 27°C (81°F) in June and 27°C (82°F) in August. However, August tends to be slightly warmer overall, with maximum temperatures averaging 32°C (89°F) compared to June's 31°C (88°F). Precipitation is also a notable difference, as August sees more rainfall with 97 mm (3.8 in) falling over 20 days, while June experiences 85 mm (3.3 in) across 17 days. Humidity levels are quite close, with August being slightly more humid at 80% compared to June's 77%. For a detailed look at June's climate, check out Isabela weather in June.
In comparing the weather between July and August, both months experience similar temperature ranges, with July recording a minimum of 24°C (76°F), an average of 27°C (81°F), and a maximum of 31°C (88°F). August, on the other hand, sees slightly higher peaks, with maximum temperatures reaching 32°C (89°F). Precipitation is also notable, with August experiencing 97 mm (3.8 in) over 20 days, while July had slightly less at 91 mm (3.6 in) over 18 days. Interestingly, humidity remains consistent at 80% for both months, making the overall feel quite similar despite the minor variances in temperature and rainfall. For more detailed information, you can check the link Isabela weather in July.
In August, the weather is warm with minimum temperatures around 24°C (76°F) and an average of 27°C (82°F), peaking at a maximum of 32°C (89°F). During this month, precipitation totals about 97 mm (3.8 in) over approximately 20 days, and the humidity is a significant 80%.
Conversely, September sees a slight increase in minimum temperature to 25°C (77°F), with the average still hovering at 27°C (81°F). The maximum temperature gently declines to 31°C (88°F). However, September experiences a notable rise in precipitation, totaling 188 mm (7.4 in) over about 23 days, with humidity slightly lower at 79%. For more detailed information, you can check out Isabela weather in September.
In comparing the weather between August and October, we see some notable similarities and differences. Both months have a minimum temperature of 24°C (76°F) and an average temperature of around 27°C (81°F). However, October's maximum temperature is slightly cooler at 31°C (88°F), compared to August's 32°C (89°F). In terms of precipitation, October experiences a higher total of 127 mm (5.0 in) over 21 days, whereas August has 97 mm (3.8 in) over 20 days, indicating a wetter month. Additionally, while humidity is slightly lower in October at 78%, it remains relatively high overall. For more details, check out Isabela weather in October.
August and November present relatively similar weather patterns, though with some distinct differences. In August, temperatures range from a minimum of 24°C (76°F) to a maximum of 32°C (89°F), with an average of 27°C (82°F). The month sees a moderate level of precipitation at 97 mm (3.8 in) over 20 days and humidity levels are high at 80%. In contrast, November experiences slightly cooler temperatures, with a minimum of 23°C (74°F) and a maximum of 30°C (85°F), averaging around 26°C (79°F). Precipitation remains similar, totaling 99 mm (3.9 in) over 19 days, but the humidity decreases slightly to 78%. For more detailed information, you can check Isabela weather in November.
In comparing the weather between August and December, a few notable differences emerge. August tends to be slightly warmer, with average temperatures reaching 27°C (82°F) and maximums up to 32°C (89°F), while December's averages drop to 25°C (78°F) with a maximum of 30°C (86°F). Precipitation is more prevalent in August, with 97 mm (3.8 in) over 20 days, compared to December's lighter rainfall of 43 mm (1.7 in) across 15 days. Humidity also decreases slightly from 80% in August to 76% in December, suggesting a more comfortable experience in the latter month. For more specific details on December weather, you can refer to Isabela weather in December.
August in Isabela brings a blend of warmth and humidity, characterized by its higher temperatures and significant rainfall. While the month averages around 27°C, the peak can soar to 32°C, making it one of the warmer months of the year. With about 20 days of rain contributing to a total of 97 mm of precipitation, August stands out as a notably wet period, creating a lush landscape but also increasing humidity levels to around 80%. This unique combination sets August apart from drier months, making it an ideal time for nature enthusiasts to experience the vibrant beauty of Isabela. For a deeper look into how August weather fits into the broader climate patterns, visit Isabela Climate.