World Resorts Costa Rica Alajuela Weather

Alajuela 7 Days Forecast

16.09
wed
Day
81°F
NE 1 mph
Precip.
57%
Night
64°F
SW 4 mph
Precip.
32%
17.09
thu
Day
81°F
SW 1 mph
Precip.
26%
Night
64°F
SW 4 mph
Precip.
33%
18.09
fri
Day
77°F
NE 3 mph
Precip.
33%
Night
66°F
SW 4 mph
Precip.
16%
19.09
sat
Day
79°F
E 4 mph
Precip.
23%
Night
68°F
SW 2 mph
Precip.
38%
20.09
sun
Day
79°F
NE 6 mph
Precip.
57%
Night
68°F
W 1 mph
Precip.
58%
21.09
mon
Day
73°F
NE 4 mph
Precip.
60%
Night
66°F
W 2 mph
Precip.
41%
22.09
tue
Day
70°F
NE 3 mph
Precip.
65%
Night
64°F
SW 2 mph
Precip.
44%

Sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 86.3°F. The highest and lowest sea temperatures during the month were 86.9°F and 85.8°F.

Air temperature in Alajuela, °F

Precipitation total in Alajuela, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Alajuela

Sunniest months:
February 16 days
March 16 days
January 15 days
Warmest months:
March 83.6 °F
April 82.7 °F
February 81.9 °F
Warmest sea temp:
April 85.2 °F
May 85.0 °F
March 84.7 °F
Coldest months:
October 75.8 °F
November 76.0 °F
September 77.0 °F
Rainiest months:
September 25 days
October 25 days
June 24 days
Windiest months:
February 6.6 mph
January 6.3 mph
March 5.7 mph

Alajuela on a weather map

Current weather
07:30
Alajuela
+64°F
SW 4 mph
Feels like: +64°F
Precip.: 15%
Places in Costa Rica:
Name
°F
Alajuela
+77°F
Jaco
+82°F
Cahuita
+82°F
Limon
+82°F
Playas del Coco
+84°F
Playa Flamingo
+84°F
Puerto Viejo de Talamanca
+81°F
Puerto Limon
+82°F
Samara
+82°F
San Jose
+68°F
Santa Teresa
+81°F
Tamarindo
+84°F
Tortuguero
+79°F
El Roble
+86°F
Heredia
+68°F
all places
24 Hours Forecast
Alajuela
Local time: 07:30
September 16, wednesday
0900
77°F
SW
2 mph
1200
81°F
NE
1 mph
1500
75°F
NW
1 mph
1800
68°F
SW
2 mph
2100
66°F
SW
5 mph
September 17, thursday
0000
64°F
SW
4 mph
0300
64°F
SW
5 mph
0600
64°F
SW
5 mph
Units of measurement: °C / °F