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Ciales Weather in May
May in Ciales averages 30°C (86°F) during the day and 23°C (73°F) at night. Quite a bit of rainfall is typical this month, with around 162 mm (6.4 in) on average. An umbrella is a good idea.
Rainfall in Ciales in May
Typically, you can expect about 16 days of rain this month, with 162 mm (6.4 in) on average. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Ciales in May
In May, expect very high temperatures in Ciales, with highs of 30°C (86°F) and lows of 23°C (73°F) at night. It's usually most comfortable outside during the morning and later in the day. With lows of 23°C (73°F), the nights are warm and generally comfortable.
Sunshine in Ciales in May
Enjoy a sunny month with about 255 hours of sunshine, the clear skies make Ciales even more beautiful.If you're looking for dry conditions and comfortable temperatures, May may not be the ideal month to visit Ciales. Our weather planner can help you explore destinations with more pleasant weather conditions.
Ciales Temperature in May
Min Temperature
23°C (73°F)
Max Temperature
30°C (86°F)
Chance of Rain
53%
Precipitation
162 mm (6.4 in)
Rainy days
16 days
Humidity
75% *
Sunshine
255 hours *
Percentage Sunshine
63% *
* Data from: San Juan, Puerto Rico (50 KM, 31 Miles).
Ciales Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ciales - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ciales typically stay consistent throughout May, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in May
Historical weather records for Ciales in May
Browse day-by-day weather records for Ciales spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ciales historical weather extremes in May
According to our 50 years of weather records for Ciales, the following extremes were recorded between 1976 and 2026.
- On May 11, 1980, temperatures climbed to 36°C (97°F), marking the warmest May day on record.
- The coldest May day was on May 10, 2014, with a maximum of 25°C (77°F).
- Ciales registered its coldest May night on May 3, 1991, with temperatures dropping to 19°C (66°F).
Best Places in Puerto Rico in May
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 May →
perfect weather
pleasant
tolerable
unpleasant
poor
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).
What to Wear in Ciales in May
Warm temperatures in May 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. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Ciales in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming8/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Ciales 3-Day Forecast
More climate data for Ciales
Temperature Rainfall Sunshine Humidity
See the full Ciales climate overview or explore weather in Puerto Rico.
Popular in May
Where to go in May - average daytime high across popular destinations.
San Juan
30°C (86°F) Rio Grande29°C (84°F) Aguada
29°C (84°F) Luquillo29°C (84°F) Culebra28°C (82°F) Rincon29°C (84°F) Vieques
28°C (82°F) Fajardo29°C (84°F) Bucket list
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