Data or statistical facts on the situation and perspectives of agri-food systems and the impact of policies
The IMN forecasts below-normal rainfall across Costa Rica from October 12 to November 8, 2026; from October 26 the deficit intensifies in the Central Pacific, North Pacific, and Central Valley (North Pacific: 1 to 70 mm per week).
From October 5 to 11, 2026, every region of Costa Rica is forecast to receive below-normal rainfall. The IMN estimates an extreme-event probability of about 20%, although it reports high uncertainty for this final week of the outlook.
Very dry conditions are forecast in the North Pacific, Central Pacific and Central Valley from October 12 to 25.
From September 28 to October 25, 2026, below-normal rainfall is forecast across much of Costa Rica.
For the week of October 12-18, 2026, Costa Rica's National Meteorological Institute (IMN) forecasts a generalization of dry conditions nationwide: the Pacific, Caribbean, Northern Zone, Central Valley, and Northwestern Zone would all see below-normal rainfall, with the forecast's uncertainty level rated as high.
For the period September 21 to October 18, 2026, Costa Rica's National Meteorological Institute (IMN) forecasts below-normal rainfall across the Pacific slope, Central Valley, and Northwestern Zone, driven by trade winds unusually stronger than typical for this time of year - an atypical pattern consistent with the rainfall deficit El Nino has been driving across Central America during 2026. The C...
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Between 30 and 155 mm of rain could accumulate in Costa Rica's Northern Zone from September 14 to 20, 2026, the highest forecast range among the country's regions. The probability of an extreme event is low, at about 25%, and forecast uncertainty is also low.
During the four weeks from September 14 to October 11, 2026, the IMN forecasts below-normal rainfall in Costa Rica's Pacific region, Central Valley, and Western Northern Zone. The pattern is expected to be associated with El Niño and stronger-than-usual trade winds.
