Daily brief · Costa Rica

San José Oct 4, 2026

Today's edition is in progress.

Weather-risk signals · signal engine (Open-Meteo)

Water conditions are improving

active

Around 219.6mm of rain has fallen over the past 14 days — above the 152.6mm typical for this period. A healthier water balance is restoring across this area.

Reading evidence

Reading calculated Oct 4, 2026, 6:01 PM UTC.

Valid until Oct 9, 2026, 12:01 AM UTC.

Source: Open-Meteo.

Recent data period: Sep 15, 2026 to Sep 28, 2026.

Years with usable data: 10 of 10.

Historical dataset: era5.

Samples: 150.

Method: rolling-sum-v2-anchor-lookback-2026-09-21.

hydro operators · agriculture · reservoir ops

A heavy rain day could hit

low

A single day could bring around 19.7mm of rain on 2026-10-10 — close to the local heavy-rain reference for this time of year (around 41.8mm in a day). This comparison adds historical context; it does not assess impacts on a specific activity.

Reading evidence

Reading calculated Oct 4, 2026, 6:00 AM UTC.

Valid until Oct 9, 2026, 12:01 AM UTC.

Source: Open-Meteo.

Forecast period: 2026-10-04 to 2026-10-10.

Forecast source: open-meteo.

Years with usable data: 10 of 10.

Historical dataset: era5.

Samples: 150.

Method: heavy-rain-percentile-max-v1-2026-09-22.

outdoor events · drainage operators · agriculture · lodging

What people were seeing · community field reports

No field observations were posted for this place on Oct 4, 2026.