Weather in Costa Rica for December 2025
In general, the average temperature in Costa Rica at the beginning of December is 24 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 24.3 °C by the end of December.
Costa Rica experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 81.8 mm.
Temperatures
Rain 🌧️
Costa Rica in December average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2 23° | 3 23° | 4 24° | 5 26° | 6 25° | 7  24° |
| 8 25° | 9 25° | 10 24° | 11 24° | 12 24° | 13 25° | 14 25° |
| 15 24° | 16 23° | 17 26° | 18 23° | 19 21° | 20 21° | 21 24° |
| 22 23° | 23  22° | 24 23° | 25 24° | 26 23° | 27 25° | 28 25° |
| 29 25° | 30 23° | 31 25° |
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Temperatures trend during December in Costa Rica
December weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. | Patchy rain possible | 23° /12° | 12.3 mm | 5 | |
| 2 Dec. | Patchy rain possible | 23° /12° | 16.7 mm | 5 | |
| 3 Dec. | Light rain shower | 23° /13° | 2.7 mm | 5 | |
| 4 Dec. | Patchy rain possible | 24° /12° | 5.1 mm | 6 | |
| 5 Dec. | Patchy rain possible | 26° /12° | 0.3 mm | 6 | |
| 6 Dec. | Patchy rain possible | 25° /11° | 2 mm | 6 | |
| 7 Dec. | Partly cloudy | 24° /11° | 0.2 mm | 6 | |
| 8 Dec. | Patchy rain possible | 25° /11° | 0.2 mm | 6 | |
| 9 Dec. | Patchy rain possible | 25° /12° | 1.2 mm | 6 | |
| 10 Dec. | Light rain shower | 24° /13° | 3.1 mm | 5 | |
| 11 Dec. | Light rain shower | 24° /13° | 2.7 mm | 5 | |
| 12 Dec. | Patchy rain possible | 24° /13° | 1.3 mm | 5 | |
| 13 Dec. | Patchy rain possible | 25° /12° | 0.6 mm | 6 | |
| 14 Dec. | Patchy rain possible | 25° /12° | 0.7 mm | 6 | |
| 15 Dec. | Light rain shower | 24° /12° | 1.2 mm | 6 | |
| 16 Dec. | Light rain shower | 23° /12° | 1.5 mm | 5 | |
| 17 Dec. | Light rain shower | 26° /11° | 1.1 mm | 6 | |
| 18 Dec. | Light rain shower | 23° /11° | 2 mm | 6 | |
| 19 Dec. | Light rain shower | 21° /12° | 4.3 mm | 5 | |
| 20 Dec. | Patchy rain possible | 21° /11° | 1.8 mm | 5 | |
| 21 Dec. | Patchy rain possible | 24° /10° | 2.1 mm | 5 | |
| 22 Dec. | Patchy rain possible | 23° /13° | 1.9 mm | 5 | |
| 23 Dec. | Cloudy | 22° /13° | 8.6 mm | 5 | |
| 24 Dec. | Cloudy | 23° /12° | 1.8 mm | 5 | |
| 25 Dec. | Light rain shower | 24° /12° | 2.4 mm | 6 | |
| 26 Dec. | Cloudy | 23° /13° | 2.5 mm | 5 | |
| 27 Dec. | Patchy rain possible | 25° /14° | 2.2 mm | 6 | |
| 28 Dec. | Light rain shower | 25° /13° | 2.5 mm | 6 | |
| 29 Dec. | Patchy rain possible | 25° /13° | 7.2 mm | 6 | |
| 30 Dec. | Patchy rain possible | 23° /13° | 2.5 mm | 5 | |
| 31 Dec. | Cloudy | 25° /11° | 1.5 mm | 6 | |
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Guide for Costa Rica in December
In December, Costa Rica experiences a transition from the rainy season to the dry season, resulting in varied weather patterns at the beginning and end of the month.
At the start of December, the weather in Costa Rica is characterized by lingering rainfall and higher humidity, particularly in the central and southern regions.
The average temperature in the capital, San Jose, hovers around 18°, while coastal areas such as Guanacaste and the Nicoya Peninsula enjoy warmer temperatures averaging around 25°.
As the month progresses, the rainy season gradually gives way to drier conditions, especially in the Pacific coastal areas.
By the end of December, the weather in Costa Rica becomes increasingly dry and sunny, with temperatures in San Jose averaging around 20° and coastal regions experiencing temperatures around 28°.
The transition to the dry season makes December an ideal time to visit Costa Rica for those seeking outdoor adventures and beach activities. However, it's important to note that weather patterns can vary across different regions of the country.
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Costa Rica in December - FAQ
December rainfall patterns in Costa Rica
UV exposure in Costa Rica during December
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