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April in Isabela brings high temperatures, with daytime highs of 29°C (84°F) and nights around 23°C (73°F). Quite a bit of rainfall is expected, around 87 mm (3.4 in), so pack an umbrella.
If you're inclined towards comfortable temperatures and drier conditions, April is a good time to visit Isabela.
Pick a month to see the average temperature, rainfall and sunshine in Isabela - and find the best time to visit.
48-year average (1977-2025)
Based on our historical records, temperatures in Isabela typically stay consistent throughout April, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 22°C (72°F).
Browse day-by-day weather records for Isabela spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
According to our 47 years of weather records for Isabela, the following extremes were recorded between 1979 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 April →
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 April 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.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
See the full Isabela climate overview or explore weather in Puerto Rico.
Where to go in April - average daytime high across popular destinations.
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