Río Segundo Weather in December
What's the weather like in Río Segundo (Alajuela) in December 2025?
The climate in Río Segundo during December can be summarized as warm and very wet.
December is in the winter in Río Segundo and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around 23°C (74°F), whilst at night 16°C (60°F) is normal.
| Daytime temperature | 23.4°C 74°F |
|---|---|
| Nightly temperature | 15.5°C 59.8°F |
| Average temperature | 19.4°C 66.9°F |
| Daily sunshine | 6.7 hrs |
| Avg rainfall | 242 mm 9.5 ins |
| Rainy days | 16 days |
| Sea temperature | 27.9°C 82.1°F |
| Humidity | 81% |
| Windspeed | 19.8kph 12 mph |
On average December is the 5th driest month of the year in Río Segundo with around 242mm 9.5 inches of rain making it a very wet time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.7 hours of sunshine per day.
December temperatures in Río Segundo
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Río Segundo in December 2025.
Other monthly averages
Best places to visit in December
Río Segundo weather stats
| Hottest month: | April | 25.2°C 77.4°F |
|---|---|---|
| Driest month: | March | 79mm 3.1ins |
| Sunniest month: | March | 7.5hrs |
| Coldest month: | January | 23°C 73.4°F |
| Wettest month: | October | 482mm 19ins |
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