Santo Tomás La Unión Weather in May
What's the weather like in Santo Tomás La Unión (Suchitepéquez) in May 2026?
The climate in Santo Tomás La Unión during May can be summarized as hot, humid and very wet.
May is in the spring in Santo Tomás La Unión and is typically the warmest month of the year. Daytime maximum temperatures average around a muggy 30°C (86°F), whilst at night 19°C (67°F) is normal.
| Daytime temperature | 29.7°C 85.5°F |
|---|---|
| Nightly temperature | 19.3°C 66.7°F |
| Average temperature | 24.5°C 76.1°F |
| Daily sunshine | 7.5 hrs |
| Avg rainfall | 452 mm 17.8 ins |
| Rainy days | 16 days |
| Sea temperature | 30.1°C 86.1°F |
| Humidity | 81% |
| Windspeed | 9.4kph 6 mph |
On average May is the 6th wettest month of the year in Santo Tomás La Unión with around 452mm 17.8 inches of rain making it a very wet time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.5 hours of sunshine per day.
May temperatures in Santo Tomás La Unión
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 Santo Tomás La Unión in May 2025.
Other monthly averages
Santo Tomás La Unión weather stats
| Hottest month: | April | 30°C 86°F |
|---|---|---|
| Driest month: | January | 33mm 1.3ins |
| Sunniest month: | February | 9.1hrs |
| Coldest month: | January | 29.1°C 84.4°F |
| Wettest month: | September | 733mm 28.9ins |
© Google