Costa Rica Braces for Hotter, Drier Second Half of 2026 as El Niño Looms

The National Meteorological Institute (IMN) warns of rising temperatures and reduced rainfall in Costa Rica for the second half of 2026 due to an emerging El Niño.

By: AXL Media

Published: Apr 10, 2026, 10:35 AM EDT

Source: The Tico Times

Forecasted Temperature Spikes and Regional Hotspots

According to IMN Director Welmer Stolz, Costa Rica should prepare for temperature anomalies ranging from 0.5°C to 1.0°C above historical norms. The Guanacaste province is projected to be the epicenter of this heatwave, exacerbating the already intense dry-season conditions. For residents, this means increased home cooling costs and a higher risk of heat-related health issues, while for the environment, it signals a dangerous spike in wildfire potential.

Significant Rainfall Deficits

The IMN has provided a detailed timeline for projected precipitation shortages across 2026:

April – June: 15% to 20% deficit

July – August: 10% to 20% deficit