Weather warnings
Jul
10
Weather Warning
Tropical Wave 14 to Pass Over Costa Rica This Friday
July 10, 2025
04.30 p.m.
Discussion: A change in the weather pattern toward more humid and unstable atmospheric conditions over Costa Rica and surrounding areas will increase the occurrence of rainfall in various parts...
Jul
08
Informative Weather Notice
Sahara dust over the country
July 08th, 2025
9:50 a.m.
Diagnosis: Increases in atmospheric pressure in the Caribbean Sea accelerate the trade winds over the basin, as well as over central and northern Spain. Furthermore, a dry, stable air mass...
Jul
07
Weather Warning
Heavy downpours during the afternoon in the Pacific and northern regions
July 07th, 2025
10.40 a.m.
Discussion: Tropical Wave 13 is located in western Costa Rica, close to entering the Pacific Ocean. Although it is a weak wave, its interaction with the Intertropical Convergence Zone increases...
Jul
06
Aviso Meteorológico
Efectos de la onda tropical #13 en el país este domingo y lunes
06 de julio de 2025
11.25 am
Diagnóstico: La onda tropical #13 se localiza este domingo al oeste de Panamá, generando inestabilidad en el mar Caribe frente a la costa costarricense, lo que favorece lluvias en el Caribe Sur...
Jul
01
Weather Warning
Rainy conditions in the Caribbean and Northern Zone this Tuesday and Tropical Wave #12
Jul 01th, 2025
10 am
Diagnosis The strengthening of the trade winds over the central and northern regions of the country has produced wind gusts of up to 50 km/h in areas such as Alajuela this morning. This...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Informativo-IMN-250620-11.30 a.m.
Jun
25
Aviso Informativo
Polvo del Sahara en Costa Rica
25 de junio de 2020
11.30 am
Diagnóstico: Este jueves la masa de polvo del Sahara se encuentra en todo América Central, siendo perceptible en Costa Rica en forma de bruma blanca en el ambiente, reduciendo la visibilidad principalmente hacia el horizonte; además de generar un ambiente caluroso y ráfagas de viento ocasionales.
Pronóstico: La presencia del polvo se percibirá el resto de semana, esperándose la mayor concentración entre la tarde de este jueves y durante el viernes, ocasionando reducción de visibilidad y pocas precipitaciones en el país.
El IMN continuará el debido seguimiento a este fenómeno y actualizando esta información diariamente
Advertencia: Recomendamos precaución a la población con problemas respiratorios y/o alergias.
Debido a lo anterior, el IMN recomienda:
- Manténganse informados a través de las redes sociales, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR y la Página WEB: www.imn.ac.cr
Juan Diego Naranjo Díaz
Meteorólogo
DMSA-IMN
RSS IMN latest alerts(Local Notification): https://www.imn.ac.cr/en/web/imn/avisos-meteorologicos/-/asset_publisher/lTlyP4wEZlDa/rss 
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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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