Costa Rica
Costa Rica in May: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Costa Rica in May is climatically mixed. The average daily high is around 33 °C, and the sea is about 29 °C. With about 20 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
46/100 · #12
Warmth
#4
Dryness
#7
Sun
#5
Sea warmth
#1
Published best categories: none
Costa Rica · MayPhoto: Shiva Shenoy from Flower Mound, United States · CC BY 2.0Climate facts
- Average high
- 33 °C
- Average low
- 26 °C
- Sea
- 29 °C
- Rainy days (est.)
- 20 rainy days (est.)
- Sun (est.)
- 7 h/day
- Humidity
- 72 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| April | 36 | 25 | 5 | 30 | 7.7 | 60 | 3.1 | 29 | 63 |
| May (selected) | 33 | 26 | 20 | 210 | 6.5 | 72 | 2.3 | 29 | 46 |
| June | 30 | 25 | 24 | 219 | 6.1 | 82 | 2.1 | 29 | 51 |
How do the previous and next months compare?
Baseline: May (46/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| April | +17 | +2.8 °C | -0.4 °C | -15 | -180.4 mm | +1.2 h | -12.3 % | +0.8 m/s | -0.2 °C |
| June | +5 | -2.6 °C | -0.5 °C | +4.1 | +9.2 mm | -0.4 h | +9.3 % | -0.3 m/s | -0.3 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Costa Rica in May?
The average daily high is around 33 °C, with an average daily low of about 26 °C.
Can you swim in Costa Rica in May?
The sea is about 29 °C (very warm).
Does it rain a lot in Costa Rica in May?
The curated estimate is about 20 rainy days per month, not a directly measured long-term average. Total precipitation averages around 210 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Costa Rica?
By the climate score, January, February, March and December are the strongest months for Costa Rica. For a beach trip: January, February, November and December. May is not among them.