Weather warnings
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...
Jun
02
Aviso Meteorológico
Lluvias continuarán en las primeras horas de la noche
2 de junio de 2025
5:45 pm
Diagnóstico: Durante esta tarde, se han registrado fuertes aguaceros en gran parte territorio nacional, siendo el Valle Central la región con los mayores acumulados entre 40 mm y 50 mm, y los...
Jun
02
Weather Warning
Thunderstorms and showers this afternoon in the Pacific slope
June 02, 2025
10:30 a.m.
Forecast: High levels of available moisture, along with local factors such as sea breezes and rising temperatures in the early afternoon, will be the ingredients for afternoon rains this early...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Informativo-IMN-240620-12 m.
Jun
24
Weather Warning
Sahara dust intrusion into the country this week
June 24, 2020
10.50 a.m.
Discussion: On this Wednesday the country is immersed in a large mass of dust from the Sahara that has moved over the Caribbean Sea.
Forecast: The presence of dust will be perceived during this Wednesday and variation of its particulate is estimated in the rest of the week, with the highest concentration expected on Friday. This situation can generate reduced visibility and more isolated rainfall in the east and north of the country.
The IMN will continue to duly monitor this phenomenon and update this information daily.
Warning: We recommend caution to the population with respiratory problems and / or allergies.
Due to the above, the IMN recommends:
Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEBSITE: www.imn.ac.cr
Rebeca Morera R
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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