Climate Overview
The climate in La Fortuna Arenal Airport is warm and mild. The average annual temperature is 23°C and approximately 2818mm of precipitation falls per year. La Fortuna Arenal Airport receives a notable amount of rainfall throughout the year, including during its driest month. La Fortuna Arenal Airport is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, April, September. The coldest months are February, January, March, when temperatures can drop to 19°C.
Temperature
La Fortuna Arenal Airport has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is May, when average highs reach 29°C and the mean temperature sits around 24°C. February is the coolest month, with minimum temperatures around 19°C and an average of 22°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows.
Precipitation
La Fortuna Arenal Airport is a very wet location, receiving approximately 2818mm of precipitation annually, which averages out to around 235mm per month. The wettest month is November, averaging 387mm of rainfall. October and June also tend to see above-average precipitation. The driest month is March, with just 36mm. That's 352mm less than November, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
La Fortuna Arenal Airport is relatively calm, with an average annual wind speed of 7km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 7km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 10km/h in winter, 8km/h in spring, 6km/h in summer, 5km/h in autumn.
Seasons
87 days until Winter
It is currently autumn in La Fortuna Arenal Airport, which began on September 23, 2026. La Fortuna Arenal Airport is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in May at around 29°C, while the coldest stretch bottoms out in February near 19°C. Winter is next, beginning on December 21, 2026 (87 days from now).
Spring
Temperatures range from 20 to 29°C. Rainfall is heavy, totalling around 379mm across the season with a monthly average of 126mm. Winds are generally light, averaging 8km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 21 to 28°C. Rainfall is heavy, totalling around 931mm across the season with a monthly average of 310mm. Winds are generally light, averaging 6km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 21 to 28°C. Rainfall is heavy, totalling around 1036mm across the season with a monthly average of 345mm. Winds are generally light, averaging 5km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 19 to 26°C. Rainfall is heavy, totalling around 472mm across the season with a monthly average of 157mm. Winds are generally light, averaging 10km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit La Fortuna Arenal Airport is during February, March and April, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 60mm per month. By contrast, May can be uncomfortably hot with temperatures reaching 29°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for La Fortuna Arenal Airport based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
