San Isidro Weather in May
May in San Isidro typically sees daytime highs of 24°C (75°F) and nighttime lows of 18°C (64°F). May falls within the rainy season, so heavy rainfall is to be expected.
Rainfall in San Isidro in May
San Isidro is in the rainy season in May, with rain on around 19 days and an average of 582 mm (23 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in San Isidro in May
Daytime temperatures in San Isidro reach 24°C (75°F) in May, dropping to 18°C (64°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in San Isidro in May
The city usually sees around 190 hours of sunlight, indicating many sunny days despite it being the rainy season.May in San Isidro has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Costa Rica, check out our San Isidro's climate page.
San Isidro Temperature in May
Min Temperature
18°C (64°F)
Max Temperature
24°C (75°F)
Chance of Rain
64%
Precipitation
582 mm (23 in)
Rainy days
19 days
Humidity
82% *
Sunshine
190 hours *
Percentage Sunshine
*
Best Places in Costa Rica in May
Find out more about the weather in Costa Rica and which places have the best travel conditions in this month. See all of Costa Rica in May →
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What to Wear in San Isidro in May
Comfortable temperatures call for an easy wardrobe in May. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. It's going to pour! Pack a good poncho and prepare for very wet conditions. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in San Isidro 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 Costa Rica, check out our San Isidro's climate page.
Temperature Rainfall Sunshine Humidity
See the full San Isidro climate overview or explore weather in Costa Rica.
