The highest day temperature in October 2025 was 80°F. The lowest night temperature was 58°F. The average values for day and night temperatures during October were 75.7°F и 62.1°F respectivly.

The average sea surface temperature in October 2025 for Alajuela was 86.5°F. The maximum and minimum values were 85.4°F and 87.4°F respectively.

Most of the days in October are gloomy but you can also expect sunny days.

Precipitation total in October for Alajuela is 23.2 in. It makes october the most rainy month of the year.

The average wind speed in October is 2.5 mph. It makes October one of the most windless months of the year for Alajuela.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Alajuela in October is 4.7 hours.