San Juan Weather in May
San Juan in May averages 30°C (86°F) during the day and 25°C (77°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in San Juan in May
Historically, approximately 18 days this month are expected to have rain, averaging 63 mm (2.5 in). Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.
Temperature in San Juan in May
Expect highs of 30°C (86°F) in San Juan in May, with nights dropping to around 25°C (77°F). Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 25°C (77°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.
Sunshine in San Juan in May
The month enjoys around 233 hours of sunshine, creating mostly sunny days with good weather conditions.
Average water temperature in May
At 28°C (82°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.Should you favor a climate that's both dry and comfortably warm, January, February and March typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Trinidad & Tobago, check out our San Juan's climate page.
San Juan Temperature in May
Min Temperature
25°C (77°F)
Max Temperature
30°C (86°F)
Water Temperature
28°C (82°F) *
Chance of Rain
61%
Precipitation
63 mm (2.5 in)
Rainy days
18 days
Humidity
79% *
Sunshine
233 hours *
Percentage Sunshine
*
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in San Juan 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 for San Juan in May
Browse day-by-day weather records for San Juan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Juan historical weather extremes in May
The extremes listed below come from historical weather data collected in San Juan from 2001 through 2025.
- The warmest day in May was on May 6, 2010, with a maximum of 35°C (95°F).
- The coldest May day was on May 4, 2021, with a maximum of 26°C (79°F).
- Nighttime temperatures dropped to 20°C (68°F) on May 5, 2011, marking the coldest May night on record.
Best Places in Trinidad & Tobago in May
Find out more about the weather in Trinidad & Tobago and which places have the best travel conditions in this month. See all of Trinidad & Tobago in May →
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What to Wear in San Juan 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. Rain gear is recommended, you can expect wet weather on multiple days. Expect water temperatures of around 28°C (82°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in San Juan in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Trinidad & Tobago, check out our San Juan's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full San Juan climate overview or explore weather in Trinidad & Tobago.
