Weather warnings
Jun
05
Weather Warning
Intertropical Convergence Zone over the country
June 5th, 2025
9:40 a.m.
Diagnosis: The Intertropical Convergence Zone is positioned over the country. This system, combined with high humidity, creates a favorable environment for rain and showers with thunderstorms...
Jun
04
Aviso Meteorológico (Actualización)
Lluvias y aguaceros con tormenta para esta tarde (actualización)
4 de junio de 2025
5:00 pm
Diagnóstico: Las altas temperaturas registradas esta mañana, junto al aumento progresivo de la humedad en el ambiente, están generando condiciones atmosféricas favorecieron la formación de...
Jun
04
Weather Warning
Rain and downpours with thunderstorms expected this afternoon
June 4th, 2025
9:55 a.m.
Diagnosis: The high temperatures recorded this morning, along with the progressive increase in humidity, are generating favorable atmospheric conditions for the formation of rain and showers with...
Jun
03
Weather Warning (Update)
Favorable conditions for heavy downpours this Tuesday
03 de junio de 2025
06.10 p.m.
Discussion: Favorable atmospheric conditions for heavy rainfall are being recorded across the country this Tuesday. The high humidity from the recent rains and the high temperatures experienced...
Jun
03
Weather Warning
Favorable conditions for heavy downpours on Tuesday
June 3th, 2025
10:00 a.m.
Forecast: Isolated showers with thunderstorms are expected along the Guanacaste and Central Volcanic mountain ranges, as well as the Central Pacific and South Pacific mountains, with estimated...
Weather warnings history
In this section you will find the weather warnings history.
Informative Meteorological Notice-IMN-301022 -Atmospheric disturbance in the Caribbean Sea close to becoming a tropical cyclone
Oct
30
Aviso Meteorológico Informativo
Atmospheric disturbance in the Caribbean Sea close to becoming a tropical cyclone
October 30, 2022
2:00 pm
The atmospheric disturbance that the National Meteorological Institute (IMN) has been monitoring continues its development and has increased its chances of becoming a tropical cyclone.
According to the National Hurricane Center of the United States (NHC for its acronym in English) these probabilities are 90% in 2 days and 5 days. According to the current projections of the trajectory and intensity of the possible cyclone, it would not have a significant impact on our country, however, the numerical models still show significant uncertainty. As part of the follow-up, this notice will be updated daily or when necessary and the information regarding our country will be incorporated.
Due to the above, the IMN recommends:
Be attentive to the issuance of informative weather warnings that are published in:
Facebook: National Meteorological Institute
WEB page: www.imn.ac.cr
Next information notice: tomorrow at 11:00 a.m.
Meteorologist
DMSA-IMN
RSS IMN latest alerts(Local Notification): https://www.imn.ac.cr/en/web/imn/avisos-meteorologicos/-/asset_publisher/lTlyP4wEZlDa/rss 
RSS IMN latest alerts (Amazon Replication): https://cap-sources.s3.amazonaws.com/cr-imn-es/rss.xml 
Impact-based forecasting
Provides information on the potential impacts to occur, in case of severe hydrometeorological events
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Ephemerides
In this section you will find all the necessary information about sunrises and sunsets of the Sun and Moon, as well as all the information about the corresponding lunar phases.
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