Weather in Costa Rica for May 2027
In general, the average temperature in Costa Rica at the beginning of May is 26.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 25.1 °C by the end of May.
Costa Rica experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 295.3 mm.
Is May a good time to visit Costa Rica? check out the best time to travel to Costa Rica page.
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Costa Rica Weather May
What’s the Weather Like in Costa Rica This May?
Temperatures trend during May in Costa Rica
May weather in Costa Rica day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Moderate or heavy rain shower | 27° /15° | 6.8 mm | 7 | |
| 2 May |  Moderate rain | 26° /15° | 12.5 mm | 6 | |
| 3 May |  Light rain | 27° /15° | 5 mm | 7 | |
| 4 May | Light rain | 27° /16° | 5.3 mm | 6 | |
| 5 May | Light rain | 27° /16° | 5.6 mm | 6 | |
| 6 May | Light rain | 27° /15° | 3.3 mm | 7 | |
| 7 May | Light rain | 26° /16° | 5.9 mm | 7 | |
| 8 May | Light rain | 27° /15° | 6 mm | 7 | |
| 9 May | Light rain | 27° /14° | 3.8 mm | 6 | |
| 10 May | Moderate rain | 27° /15° | 14.7 mm | 7 | |
| 11 May | Light rain | 27° /15° | 6 mm | 7 | |
| 12 May | Moderate rain | 26° /16° | 10.3 mm | 6 | |
| 13 May | Light rain | 26° /16° | 9.1 mm | 6 | |
| 14 May | Light rain | 26° /16° | 7 mm | 7 | |
| 15 May | Moderate or heavy rain shower | 26° /15° | 7.9 mm | 7 | |
| 16 May | Moderate rain | 25° /16° | 21.1 mm | 6 | |
| 17 May |  Heavy rain at times | 26° /17° | 9.7 mm | 6 | |
| 18 May | Light rain | 27° /16° | 3.6 mm | 6 | |
| 19 May | Light rain | 27° /16° | 5.9 mm | 7 | |
| 20 May | Moderate rain | 26° /16° | 16.4 mm | 5 | |
| 21 May | Light rain | 28° /15° | 5.8 mm | 7 | |
| 22 May | Light rain | 26° /16° | 6.4 mm | 7 | |
| 23 May | Light rain | 27° /16° | 8.7 mm | 6 | |
| 24 May | Light rain | 26° /15° | 6.2 mm | 6 | |
| 25 May | Light rain | 26° /16° | 5.7 mm | 6 | |
| 26 May | Moderate rain | 25° /16° | 11 mm | 6 | |
| 27 May | Moderate or heavy rain shower | 26° /16° | 6.2 mm | 6 | |
| 28 May | Moderate rain | 26° /14° | 10.3 mm | 5 | |
| 29 May | Moderate rain | 25° /16° | 20.2 mm | 5 | |
| 30 May |  Heavy rain | 24° /15° | 27.6 mm | 5 | |
| 31 May | Moderate rain | 24° /15° | 21.5 mm | 5 | |
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Guide for Costa Rica in May
In May, Costa Rica experiences a transition from the dry season to the beginning of the rainy season. At the start of the month, the weather in Costa Rica is generally warm and sunny, with average temperatures ranging from 25° to 30°.
The Pacific coast and central regions tend to be drier and hotter, while the Caribbean coast may experience more rainfall.
As the month progresses, the weather becomes increasingly humid and the likelihood of rain showers rises. By the end of May, the average temperatures range from 24° to 28°, and the country begins to see more frequent afternoon showers and thunderstorms, especially in the afternoons and evenings.
The central valley and Pacific coast may still enjoy some sunny days, but the Caribbean coast and northern regions are likely to experience more consistent rainfall.
Overall, May in Costa Rica offers a mix of warm, sunny days and increasing rainfall, making it a transitional period between the dry and rainy seasons. Travelers should be prepared for changing weather conditions and pack accordingly for both sun and rain.