Last updated: August 27, 2025
In December, the average temperature in Arenal Santa Ana, Mexico reaches a pleasant 22°C (73°F). Expect a range where the minimum temperature can drop to 12°C (53°F) and the maximum can soar up to 34°C (93°F). During this time, precipitation averages around 40 mm (1.6 in) spread over 7 days, while humidity levels hover at a high 88%. 🏖️
In December in Arenal Santa Ana, the average temperature is 22°C (73°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 12°C (53°F). This makes it an ideal time for travelers seeking pleasant weather and outdoor activities.
In Arenal Santa Ana in December, the precipitation amount is 40 mm (1.6 in) over a span of 7 days.
In Arenal Santa Ana in December humidity is 88%. With an average temperature of 22°C (73°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor adventures a sweaty endeavor and prompting frequent breaks for hydration and shade.
In Arenal Santa Ana in December, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 December’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 |