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Humacao Weather in May
During May, Humacao experiences high daytime temperatures of 29°C (84°F) and cooler nights around 24°C (75°F). Expect quite a bit of rainfall. Around 147 mm (5.8 in) is typical.
Rainfall in Humacao in May
Typically, you can expect about 16 days of rain this month, with 147 mm (5.8 in) on average. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Humacao in May
Temperatures in Humacao in May top out at 29°C (84°F) and drop to 24°C (75°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Humacao in May
Enjoy a sunny month with about 255 hours of sunshine, the clear skies make Humacao even more beautiful.If you prefer dry days with pleasant temperatures, January, February, March, April and December typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Humacao Temperature in May
Min Temperature
24°C (75°F)
Max Temperature
29°C (84°F)
Chance of Rain
53%
Precipitation
147 mm (5.8 in)
Rainy days
16 days
Humidity
75% *
Sunshine
255 hours *
Percentage Sunshine
63% *
* Data from: San Juan, Puerto Rico (36 KM, 22 Miles).
Humacao Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Humacao - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Humacao typically stay consistent throughout May, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for Humacao in May
Browse day-by-day weather records for Humacao spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Humacao historical weather extremes in May
Based on 50 years of weather observations in Humacao between 1976 and 2026, these are the recorded extremes.
- On May 21, 2005, temperatures climbed to 35°C (95°F), marking the warmest May day on record.
- The lowest daytime temperature in May was 24°C (75°F), recorded on May 6, 1982.
- The coldest night in May in Humacao was on May 10, 1986, with a minimum of 20°C (68°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 Humacao in May
Warm weather calls for comfortable, breathable clothing in May. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Humacao in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Humacao 3-Day Forecast
More climate data for Humacao
Temperature Rainfall Sunshine Humidity
See the full Humacao 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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