Alajuela Weather in August
What's the weather like in Alajuela (Alajuela) in August 2025?
The climate in Alajuela during August can be summarized as warm, humid and very wet.
August is in the summer in Alajuela and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (77°F), whilst at night 18°C (64°F) is normal.
| Daytime temperature | 25.1°C 77.2°F |
|---|---|
| Nightly temperature | 17.7°C 63.9°F |
| Average temperature | 21.4°C 70.5°F |
| Daily sunshine | 6.5 hrs |
| Avg rainfall | 386 mm 15.2 ins |
| Rainy days | 23 days |
| Sea temperature | 28.7°C 83.7°F |
| Humidity | 84% |
| Windspeed | 12.6kph 8 mph |
On average August is the 5th wettest month of the year in Alajuela with around 386mm 15.2 inches of rain making it a very wet time to visit. This rainfall is typically spread over 23 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.5 hours of sunshine per day.
August temperatures in Alajuela
August rainfall
August 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 Alajuela in August 2025.
Other monthly averages
Best places to visit in August
Alajuela weather stats
| Hottest month: | April | 26.4°C 79.5°F |
|---|---|---|
| Driest month: | February | 15mm 0.6ins |
| Sunniest month: | February | 7.7hrs |
| Coldest month: | January | 24.1°C 75.4°F |
| Wettest month: | September | 498mm 19.6ins |
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