Ongoing Meiyu frontal activity across northern Taiwan is moderating daytime heating in Taipei, keeping the expected daily maximum temperature clustered near 29–30°C. Persistent cloud cover and elevated humidity reduce incoming solar radiation and suppress surface warming, consistent with historical mid-May patterns when the East Asian monsoon trough lingers. Current forecast models show only modest variability in peak values depending on exact timing of any brief breaks in overcast conditions, which explains the tightly grouped market-implied probabilities between 29°C and 31°C. Official Central Weather Administration updates through tonight will refine the final range before resolution.