Weather in Alajuela: December
![]() |
Average day temperature: | 78.5°F |
Average night temperature: | 59.8°F | |
![]() |
Sea water temperature: | 83.0°F |
![]() |
Number of sunny days: | 10 days |
Day length: | 11.5 - 11.6 hours | |
![]() |
Number of rainy days: | 5 days |
Precipitation totals: | 3.2 in. | |
more information |
forecast
Alajuela |
temperature
Alajuela |
Air temperature in December, °F
Day temperature | Night temperature |
The highest day temperature during December of 2024 was 81°F. At the same time the lowest night temperature was 53°F. Daily and nightly averages during December were 75.8°F and 59.1°F.
Sea water temperature in Alajuela in December, °F
The average sea water temperature in December of 2024 was 82.8°F. The highest and lowest sea temperatures during the month were 83.8°F and 81.9°F.
Sunny days | |
Partly cloudy days | |
Cloudy days |
Mostly all days in December are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Alajuela in December is 3.4 in. It makes december one of the most dry months of the year.
The average wind speed value in December is 5.2 mph It makes December one of the most windy months of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 5.9.
Best time for vacation in Alajuela
Alajuela on a weather map

4 mph

4 mph

4 mph

4 mph

3 mph

2 mph

1 mph

3 mph