Last updated: August 23, 2025
In October, the average temperature in San Isidro, Costa Rica is a comfortable 22°C (72°F), perfect for outdoor activities. Expect minimum temperatures of 19°C (67°F) and maximums reaching 25°C (78°F). However, be prepared for some rain, as the region experiences 937 mm (36.9 in) of precipitation over the month, coupled with an average humidity of 80%. Plan accordingly to make the most of your visit!
In October in San Isidro, the average temperature is a pleasant 22°C (72°F), with maximums occasionally reaching 25°C (78°F) and minimums dropping to around 19°C (67°F). This makes it an ideal time for travelers to enjoy outdoor activities and explore the local attractions comfortably.
In San Isidro in October, the total precipitation amount is 937 mm (36.9 in) over a span of 30 days.
In San Isidro in October humidity is 80%. With an average temperature of 22°C (72°F), this humidity feels like a warm, enveloping blanket that can quickly sap your energy while traveling, making you feel sticky and uncomfortable if you're not prepared.
In San Isidro in October, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Isidro, you can check here.
UV Risk Categories
Weather in San Isidro varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in San Isidro, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 22°C (72°F) | 194 mm (7.6 inches) | 68% | extreme |
| February Weather | 22°C (73°F) | 99 mm (3.9 inches) | 68% | extreme |
| March Weather | 23°C (73°F) | 120 mm (4.7 inches) | 66% | extreme |
| April Weather | 23°C (73°F) | 350 mm (13.8 inches) | 67% | extreme |
| May Weather | 23°C (73°F) | 742 mm (29.2 inches) | 69% | extreme |
| June Weather | 23°C (73°F) | 663 mm (26.1 inches) | 84% | extreme |
| July Weather | 22°C (73°F) | 784 mm (30.8 inches) | 85% | extreme |
| August Weather | 22°C (73°F) | 838 mm (33.0 inches) | 82% | extreme |
| September Weather | 22°C (72°F) | 766 mm (30.1 inches) | 81% | extreme |
| October Weather | 22°C (72°F) | 937 mm (36.9 inches) | 80% | extreme |
| November Weather | 22°C (72°F) | 885 mm (34.8 inches) | 80% | extreme |
| December Weather | 22°C (72°F) | 354 mm (13.9 inches) | 72% | extreme |