2021 Forecast for Flying During the “Indian Summer”

The "veranillo" is a meteorological condition characterized by a relative decrease or total absence of rainfall for a period of a few days, in the middle of the rainy season, and which presents conditions similar to those of the dry season.

Costa Rican tradition holds that the "little summer of San Juan" occurs every year around June 23rd; however, climatically speaking, historical data shows that this dry spell can occur at any time during the second half of June, before or after the 23rd, and its duration on average does not exceed 5 days. This occurrence of consecutive dry days is exclusive to the Pacific slope and the Central Valley.

This year the dry spell is expected between June 19 and 25, and will be weak, affecting only very specific areas of the central Pacific and Central Valley: Santa Cruz, Bagaces, Liberia, Atenas, Naranjo, Alajuela, Santa Ana….

This year, the factors influencing the San Juan dry spell are not favorable for it to be strong and prolonged. The areas where it is expected to occur are the Central Valley and the North Pacific, specifically in the cantons of Liberia, Carrillo, Bagaces, and Cañas. It is also expected in certain sectors of the Central Valley. In other regions, the dry spell could be of weak intensity, meaning it will be short-lived or, at most, the rains will not stop completely, but will continue with low intensity and volume.