Measurements:
°C
°F
CURRENT WEATHER
16:19
Alajuela
80°F
NE 5 mph
Feels like: 82°F
Precip: 0%
World Resorts Costa Rica Alajuela Weather

7 Day Weather Forecast

12.18
thu
DAY
84°F
E 3 mph
precip
0%
NIGHT
56°F
SW 4 mph
precip
0%
12.19
fri
DAY
86°F
SW 4 mph
precip
0%
NIGHT
56°F
SW 4 mph
precip
0%
12.20
sat
DAY
86°F
SW 6 mph
precip
0%
NIGHT
54°F
SW 5 mph
precip
0%
12.21
sun
DAY
86°F
SW 6 mph
precip
0%
NIGHT
56°F
SW 5 mph
precip
0%
12.22
mon
DAY
86°F
SW 6 mph
precip
0%
NIGHT
56°F
SW 5 mph
precip
0%
12.23
tue
DAY
86°F
SW 5 mph
precip
0%
NIGHT
60°F
SW 4 mph
precip
0%
12.24
wed
DAY
84°F
SW 3 mph
precip
85%
NIGHT
54°F
SW 5 mph
precip
0%

Alajuela Sea Water Temperature in December, °F

Select Year: 2025 2024 2023

The average sea surface temperature in December 2025 for Alajuela was 28.3°F. The maximum and minimum values were 28.0°F and 28.6°F respectively.

Alajuela on the Weather Map

Best Time to Visit Alajuela
The most sunny months:
February 17 days
January 16 days
March 16 days
The most warm months:
March 87.4 °F
April 86.5 °F
February 85.9 °F
Warmest sea temperature:
April 89.1 °F
May 88.8 °F
March 88.5 °F
The most cold months:
October 78.7 °F
November 78.8 °F
September 80.0 °F
The most rainy months:
October 25 days
June 25 days
September 25 days
The most windy months:
February 6 mph
January 6 mph
March 6 mph
more details