Japan
Score moved 3 → 4 (minimal impact → moderate impact). “Japan's weather agency calls it the strongest El Niño on record — but the summer heat never quite arrived”
Japan's weather agency has declared the current El Niño the strongest on record, with articles warning of a 'super' event that could reshape global weather and bring extreme summer heat to Japan. Yet measured conditions for July–October 2026 show temperatures only about 0.9°C above normal and rainfall roughly 61% above average, a far milder outcome than the headline heat warnings implied. The canonical El Niño signal for Japan — mild winters and cooler summers — appears to be holding better than the extreme-heat narrative, leaving the agricultural calendar broadly on schedule.
800.5 mm vs 498.3 mm normal
Measured rainfall for July–October 2026 ran about 61% above the 1991–2020 normal, though this window falls in Japan's climatologically dry season, so the more meaningful signal is the outlook for the coming autumn rains.
News source19.96°C mean vs 19.01°C normal
Mean temperatures for the same July–October window came in about 0.9°C above normal, a milder-than-expected outcome that runs counter to the extreme summer heat some articles projected for a 'super' El Niño.
News sourceWith planting (Apr–May), the summer monsoon (Jun–Aug) and harvest (Sep–Oct) all proceeding broadly on schedule, the warm, wet conditions have mainly supported crop development rather than disrupting the calendar.
NASA POWER (MERRA-2) reanalysis, 9 Jul 2026 – 6 Oct 2026, sampled at the country centroid (36.0°, 138.0°). Normals are 1991–2020. How this is computed
When it matters
Agricultural calendar for Japan and where the El Niño impact window falls
Last 12 months vs normal
Observed monthly rainfall against the 1991–2020 climatology
Sector by sector
Warm, wet conditions have kept planting, monsoon and harvest broadly on schedule, though excess rain in the dry-season window could affect late rice and vegetable quality.
Above-normal rainfall has eased reservoir and irrigation stress, but the coming autumn rains remain the key determinant of water security.
Warmer, wetter conditions raise the risk of heat stress in vulnerable groups and may expand mosquito-borne disease ranges, though no major outbreak has been reported.
A milder-than-expected summer reduces cooling demand, while a forecast mild winter would lower heating load and ease seasonal power and gas pressure.
El Niño-driven shifts in Pacific currents and sea-surface temperatures are expected to displace sardine, mackerel and skipjack stocks, altering catch locations and quotas.
What happened last time
Past El Niño episodes and how Japan responded. See the full ENSO timeline →
2023-24
A strong El Niño contributed to record global warmth, with Japan experiencing a mild winter and above-normal rainfall that affected agricultural timing and water management.
unsourced background2015-16
A powerful El Niño produced a notably mild Japanese winter and suppressed summer heat, reducing energy demand but contributing to variable crop yields and marine ecosystem shifts.
unsourced background1997-98
One of the strongest El Niño events on record brought a mild winter and weak summer heat to Japan, with warm, wet conditions disrupting rice quality and shifting fisheries catches.
unsourced backgroundLatest coverage
RSSSomething coming: What scientists know about a potential 'super' El Nino
Japan Calls It: The Dreaded El Niño Has Arrived
Super El Niño Could Bring Extreme Heat to Japan This Summer
Record El Niño Declared, But Japan Escapes the Worst of the Heat
Japan's weather agency has declared the current El Niño the strongest on record, with articles warning of a 'super' event that could reshape global weather and bring extreme summer heat to Japan. Yet
Nearby
Other countries in Eastern Asia