Water conditions are improving
strongAround 356.9mm of rain has fallen over the past 14 days — above the 13.6mm typical for this period. A healthier water balance is restoring across this area.
hydro operators · agriculture · reservoir ops
Daily brief · Japan
Tokyo 2026-09-21
Verified against recorded weather
Weather-risk signals · signal engine (Open-Meteo)
A heavy rain day could hit
extremeA single day could bring around 196.7mm of rain on 2026-09-21 — above the local heavy-rain reference for this time of year (around 36.6mm in a day). Construction, drainage, and outdoor events should review schedules.
outdoor events · drainage operators · agriculture
Rainfall is trending above the usual
extremeAround 196.7mm of rain may fall in the next 48 hours — above the 1.7mm typical for this period. Field access, drying, and outdoor logistics may be affected.
farmers · tourism · logistics
What the day recorded · Open-Meteo daily archive
Rain 154.6 mmMax 25.3 °CMin 21 °CGusts 65.9 km/h
Water conditions are improving: recorded 154.6 mm vs a local baseline of 13.6 mm — above the local baseline
Rainfall is trending above the usual: recorded 154.6 mm vs a local baseline of 1.7 mm — above the local baseline
Directional single-day check: recorded daily values compared against the historical baseline each signal was measured from. Signals cover multi-day windows, so this is context, not a forecast grade.
What people were seeing · community field reports
No field observations were posted for this place on 2026-09-21.