Recent forecasts from the Japan Meteorological Agency and global models indicate a frontal boundary will increase cloud cover and precipitation chances over Tokyo on August 29, limiting daytime heating compared to the 31–33 °C readings observed earlier in the week. Ensemble guidance and operational runs cluster maximum temperatures in the 26–29 °C range, with the highest values hinging on the exact timing and intensity of showers that suppress insolation. Historical August climatology shows typical maxima near 30 °C, but the current setup favors a modest negative anomaly. Traders assign the greatest implied probability to 27–28 °C because model spread remains modest within 48 hours of the event, though updated JMA guidance or shifts in steering flow could still nudge the outcome one degree either way.