Last updated: August 27, 2025
In May, the average temperature in Arenal Santa Ana, Mexico reaches a warm 29°C (85°F). Expect a range from a refreshing 19°C (67°F) to a scorching 41°C (106°F). While you'll enjoy plenty of sunshine, be prepared for 98 mm (3.9 in) of precipitation over 13 days. With an average humidity of 72%, the air can feel quite muggy.
In May in Arenal Santa Ana, the average temperature is 29°C (85°F), with maximums reaching up to 41°C (106°F) and minimums dropping as low as 19°C (67°F). This range of temperatures makes it essential for travelers to pack both lightweight clothing for the heat and layers for cooler evenings.
In Arenal Santa Ana in May, the precipitation amount is 98 mm (3.9 in) over a span of 13 days.
In Arenal Santa Ana in May humidity is 72%. With an average temperature of 29°C (85°F), this humidity feels like a warm, sticky embrace that can make traveling feel quite exhausting. You may find yourself needing to take frequent breaks in the shade and staying hydrated as the muggy air wraps around you, making every step a little heavier.
In Arenal Santa Ana in May, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Arenal Santa Ana.
UV Risk Categories
Weather in Arenal Santa Ana varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Arenal Santa Ana, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 22°C (72°F) | 47 mm (1.8 inches) | 84% | very high |
| February Weather | 23°C (74°F) | 41 mm (1.6 inches) | 80% | extreme |
| March Weather | 25°C (78°F) | 28 mm (1.1 inches) | 73% | extreme |
| April Weather | 28°C (83°F) | 35 mm (1.4 inches) | 67% | extreme |
| May Weather | 29°C (85°F) | 98 mm (3.9 inches) | 72% | extreme |
| June Weather | 28°C (83°F) | 352 mm (13.8 inches) | 73% | extreme |
| July Weather | 27°C (82°F) | 266 mm (10.5 inches) | 76% | extreme |
| August Weather | 27°C (81°F) | 362 mm (14.3 inches) | 80% | extreme |
| September Weather | 27°C (81°F) | 389 mm (15.3 inches) | 84% | extreme |
| October Weather | 26°C (79°F) | 272 mm (10.7 inches) | 89% | extreme |
| November Weather | 24°C (75°F) | 133 mm (5.2 inches) | 88% | very high |
| December Weather | 22°C (73°F) | 40 mm (1.6 inches) | 88% | very high |