San Jose Weather in May
Costa Rica · 30-year monthly averages
⚠️ Challenging time to visit
May in San Jose is hot, with average daytime highs around 31°C (87°F) and nighttime lows near 17°C (63°F). Expect roughly 244mm of precipitation spread over about 17 rainy days, and heavy rainfall is common — this is peak wet season territory.
Avg high
31°C
87°F
Avg low
17°C
63°F
Rainfall
244mm
very wet
Rainy days
17
days with ≥1mm
🎒 What to pack
- breathable summer clothing
- sunscreen, hat and sunglasses
- refillable water bottle
- compact umbrella or rain jacket
May vs the rest of the year
FAQ
- How hot is San Jose in May?
- May in San Jose is hot, with average daytime highs around 31°C (87°F) and nighttime lows near 17°C (63°F). Expect roughly 244mm of precipitation spread over about 17 rainy days, and heavy rainfall is common — this is peak wet season territory.
- Does it rain a lot in San Jose in May?
- San Jose sees around 244mm of precipitation in May on average — very wet by global standards.
- Is May a good time to visit San Jose?
- May is a challenging month to visit San Jose weather-wise — plan around the conditions.