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Carolina Weather in May
In Carolina, May brings high daytime temperatures around 30°C (86°F), with nights cooling to 24°C (75°F). Expect quite a bit of rainfall this month.
Rainfall in Carolina in May
You can expect rain on around 16 days based on historical patterns, with 138 mm (5.4 in) average for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Carolina in May
Daytime temperatures in Carolina reach 30°C (86°F) in May, dropping to 24°C (75°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With lows around 24°C (75°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Carolina in May
Enjoy a sunny month with about 255 hours of sunshine, the clear skies make Carolina even more beautiful.
Wind Speed in Carolina in May
Wind speeds average 3 m/s (6 knots) during May. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.
Average water temperature in May
The water is 27°C (81°F) this month, warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.May in Carolina can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Carolina Temperature in May
Min Temperature
24°C (75°F)
Max Temperature
30°C (86°F)
Water Temperature
27°C (81°F) *
Chance of Rain
53%
Precipitation
138 mm (5.4 in)
Rainy days
16 days
Humidity
75% *
Windspeed
3 m/s (6 knots) *
Sunshine
255 hours *
Percentage Sunshine
63% *
* Data from: San Juan, Puerto Rico (7 KM, 4 Miles).
Carolina Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Carolina - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Carolina 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
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 Carolina in May
Browse day-by-day weather records for Carolina spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Carolina historical weather extremes in May
Based on 50 years of weather observations in Carolina between 1976 and 2026, these are the recorded extremes.
- On May 11, 1980, temperatures climbed to 36°C (97°F), marking the warmest May day on record.
- Carolina experienced its chilliest May day on May 23, 2004, reaching only 24°C (75°F).
- The lowest overnight temperature recorded in May was 21°C (70°F) (May 7, 1986).
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 Carolina 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. With water temperatures around 27°C (81°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Carolina 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
Carolina 3-Day Forecast
More climate data for Carolina
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Carolina 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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