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August in Bayamon brings very high temperatures, with daytime highs of 31°C (88°F) and nights around 25°C (77°F). Quite a bit of rainfall is expected, around 107 mm (4.2 in), so pack an umbrella.
Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March and December typically offer the best weather for Bayamon.
Pick a month to see the average temperature, rainfall and sunshine in Bayamon - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Bayamon typically stay consistent throughout August, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 26°C (79°F).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Bayamon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
According to our 50 years of weather records for Bayamon, the following extremes were recorded between 1976 and 2026.
Find out more about the weather in Puerto Rico and which places have the best travel conditions in this month. See all of Puerto Rico in August →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. The water temperature sits at about 29°C (84°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Bayamon climate overview or explore weather in Puerto Rico.
Where to go in August - average daytime high across popular destinations.
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