Alajuela Weather in May
What's the weather like in Alajuela (Alajuela) in May 2025?
The climate in Alajuela during May can be summarized as warm, humid and very wet.
May is in the spring in Alajuela and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (79°F), whilst at night 18°C (64°F) is normal.
| Daytime temperature | 26°C 78.8°F |
|---|---|
| Nightly temperature | 17.8°C 64°F |
| Average temperature | 21.9°C 71.4°F |
| Daily sunshine | 6.9 hrs |
| Avg rainfall | 391 mm 15.4 ins |
| Rainy days | 19 days |
| Sea temperature | 29°C 84.1°F |
| Humidity | 82% |
| Windspeed | 12.6kph 8 mph |
On average May is the 4th wettest month of the year in Alajuela with around 391mm 15.4 inches of rain making it a very wet time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.9 hours of sunshine per day.
May temperatures in Alajuela
May rainfall
May 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 May 2025.
Other monthly averages
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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