Weather warnings
Aviso Meteorológico Informativo-IMN-080324-845 a.m.
Mar
08
Weather Warning
Extreme heat in the country continues this weekend
March 8, 2024
8.45 am
Diagnosis: The usually hot conditions of the month of March in our country are still present and, together with the absence of clouds and trade winds, as well as the presence of the El Niño phenomenon, continue to generate extreme maximum temperatures in Guanacaste and the Central Valley that have broken some records of the current month.
Forecast: Current analyzes indicate that these extreme heat conditions will continue into the weekend in the national territory. This Friday, we expect maximum temperatures close to 40°C during the day for the North Pacific, occasionally higher values could be recorded. While in the Central Valley the maximum temperature values close to 33°C will remain, especially in the west of the region. In the rest of the country, maximum temperatures between 33°C and 36°C are expected, the highest in the border sector with Panama and towards the plains of the northern border as well.
Starting Monday, we will have a decrease in extreme heat due to the increase in trade winds.
Due to the above, the IMN recommends:
• Stay hydrated regularly to avoid heat stroke.
• Use sunscreen at all times, avoiding exposure to solar radiation between 10 am and 2 pm.
• Information and recommendations on ultraviolet radiation index at: https://www.imn.ac.cr/indice-ultravioleta
• Map of current temperatures at: https://www.imn.ac.cr/web/imn/mapa
• Stay informed through social networks, Twitter: @IMNCR, Facebook: National Meteorological Institute CR and the WEB Page: www.imn.ac.cr
Weather warnings history
In this section you will find the weather warnings history.
Jun
03
Weather Advisory
Active Intertropical Convergence Zone (ITCZ) - Update
June 3, 2026
04:30 p.m.
Current Situation: This Wednesday, the Intertropical Convergence Zone remains active and close to Costa Rica, creating unstable atmospheric conditions and promoting the development of rain...
Jun
03
Weather Warning
Active Intertropical Convergence Zone
03/06/2026
10:05 a.m.
Discussion: This Wednesday, the Intertropical Convergence Zone (ITCZ) remains active and close to Costa Rica, promoting unstable atmospheric conditions and the development of showers and...
Jun
03
Informational Weather Advisory
Monitoring a Potential Cyclonic Development During the Weekend
03/06/2026
9:00 a.m.
Analysis: Environmental conditions are favorable for the development of a low-pressure system over the eastern Pacific waters near the Central American coastline during the weekend and early next...
Jun
02
Weather Advisory
Tropical Wave #7 Affecting the Country
June 2, 2026
10:45 a.m.
Analysis: Tropical Wave #7 is moving across the country this Tuesday and is associated with weak activity. However, its interaction with accelerated trade winds over the Caribbean Sea and the...
May
30
Aviso Meteorológico -Actualización-
Aguaceros y tormenta eléctrica este fin de semana
30 de mayo de 2026
5.50 p.m.
Diagnóstico: Elevada humedad en el sur de Centroamérica aunado a la activa Zona de Convergencia Intertropical y a factores de la atmósfera alta, son los indicadores de inestabilidad presente este...
May
30
Aviso Meteorológico
Aguaceros y tormenta eléctrica este fin de semana
30 de mayo de 2026
10.00 a.m.
Diagnóstico: Elevada humedad en el sur de Centroamérica aunado a la activa Zona de Convergencia Intertropical y a factores de la atmósfera alta, son los indicadores de inestabilidad presente este...
May
29
Weather Warning
Thundershowers and rains this afternoon and evening of this Friday
May 29, 2026
10:30 a.m.
Diagnosis: High humidity levels, combined with widespread regional instability resulting from the Intertropical Convergence Zone and upper-level atmospheric factors, are expected to bring...
May
28
Aviso Meteorológico | Actualización
Onda tropical # 5 sobre el país
28 de mayo de 2026
5:40 p.m.
Diagnóstico: El ingreso de la onda tropical #5 en la madrugada de este día genera condiciones atmosféricas inestables sobre el país. Esta situación, en conjunto con la cercanía de la Zona de...
May
28
Weather Warning
Tropical Wave #5 over the country
May 28, 2026
10.30 a.m.
Discussion: The arrival of Tropical Wave #5 in the early hours of this morning is generating unstable atmospheric conditions over the country. This situation, combined with the proximity of the...
May
27
Weather Warning
Thunderstorms and Heavy Showers this day
May 27, 2026
5:40 p.m.
Diagnosis: The gradual weakening of the trade winds, combined with the approach of the Intertropical Convergence Zone and high humidity and morning temperatures, has led to thunderstorms in...
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