Last updated: August 27, 2025
In October, the average temperature in Arenal Santa Ana, Mexico hovers around 26°C (79°F), making it a warm destination for travelers. Expect nighttime lows of 18°C (65°F) and daytime highs reaching up to 36°C (96°F). However, be prepared for the weather; with about 272 mm (10.7 in) of precipitation over 21 days, you'll want to pack an umbrella! The atmosphere is notably humid, boasting an average of 89% humidity, adding to the tropical feel of the locale.
In October in Arenal Santa Ana, the average temperature is 26°C (79°F), with maximums reaching as high as 36°C (96°F) and minimums dipping to 18°C (65°F). This climate makes Arenal Santa Ana an ideal destination for travelers seeking warm and pleasant weather.
In Arenal Santa Ana in October, the precipitation amount is 272 mm (10.7 in) over the course of 21 days.
In Arenal Santa Ana in October, humidity is 89%. With an average temperature of 26°C (79°F), this humidity feels like walking through a warm, thick blanket, making it feel much hotter and more exhausting for traveling, as every step seems to weigh you down in the muggy air.
In Arenal Santa Ana in October, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. 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 October’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 |