Weather warnings
May
12
Weather Warning
Variable rains during the afternoon on Monday and the passage of the tropical wave this Tuesday
May 12, 2025
03:40 p.m.
Diagnosis: The increase in moisture content from both sides, combined with local factors such as Pacific breezes and high daytime temperatures, have favored the presence of heavy downpours with...
May
11
Weather Warning
Rain of varying intensity this Sunday
May 11, 2025
12:40 p.m.
Forecast: This Sunday, the Intertropical Convergence Zone (ITCZ) is approaching the country, and moisture content is gradually increasing in the region. This system, combined with daytime warming...
May
10
Weather Warning
Rainy activity this Saturday
May 10, 2025
9:05 a.m.
Diagnosis: This Saturday, the Intertropical Convergence Zone remains over the national territory. In addition, high atmospheric pressure levels are increasing the intensity of the trade winds...
May
09
Aviso Meteorológico
Heavy downpours with thunderstorms this afternoon on the Pacific side
May 9, 2025
10:00 am
Diagnostic: The Intertropical Convergence Zone remains positioned near our country. Additionally, local factors such as high temperatures and the entry of sea breezes contribute to favorable...
May
08
Meteorological Warning Update
(Update) Showers and thunderstorms during the afternoon and early morningmeras horas de la noche
May 8, 2025
6:00 pm
Forecast: Rainy conditions have been observed this afternoon on the Pacific coast, much of the Central Valley, and mountainous areas of the Caribbean and the Northern Zone, due to the activity of...
Weather warnings history
In this section you will find the weather warnings history.
Aviso Meteorológico Informativo-IMN-180820-0120pm
Aug
18
Informative Weather Warning
Tracking tropical wave # 30 and its potential in tropical cyclone
August 18, 2020
01.20 p.m.
Discussion: Tropical wave # 30 is located in the Caribbean Sea north of Venezuela, approximately 1630 km from Costa Rica. The National Hurricane Center (NHC) indicates development potential in a tropical depression of 20% (low) in the next 48 hours and 70% (high) in 5 days.
Forecast: According to the latest analysis, tropical wave # 30 will be approaching Costa Rica on Thursday. Due to its possible position and strengthening in a tropical cyclone, a high probability of indirect influence towards our country is estimated; which can generate an increase in rainfall in the national territory from that day and towards the weekend.
The IMN will keep strict monitoring of the evolution of said disturbance and will inform in a timely manner of any variation of the same and its possible influence on the country.
Therefore, the IMN recommends:
- Stay informed through social networks, Twitter: @IMNCR, Facebook: Instituto Meteorológico Nacional CR and the WEB Page: 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 
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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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