Ostional Precipitation: Average Monthly Rainfall and Snowfall

This graph shows the average amount of rainfall per month in Ostional (Guanacaste). The numbers are calculated over a 30-year period to provide a reliable average.

• A lot of rain (rainy season) falls in the months: May, June, July, August, September, October and November.
• Ostional has dry periods in January, February and March.
• On average, October is the wettest month with 448 mm of precipitation.
• On average, February is the driest month with 8 mm of precipitation.
• The average amount of annual precipitation is 2516 mm.