Forecast models from the Central Weather Administration and global ensembles show Taipei's June 15 high temperature likely settling near 28–29 °C, driving the tight clustering of market-implied probabilities around those bins. Subtropical summer conditions, including high humidity, variable cloud cover, and the urban heat island effect, create small but decisive differences between 27 °C and 30 °C outcomes. Recent model runs indicate modest uncertainty tied to possible afternoon showers or a strengthening sea breeze that could cap peak readings, while historical June climatology places average highs near 32 °C but recent patterns have trended slightly cooler. Traders are weighting the next 12–24 hours of satellite and local station data, which will refine land–sea interactions and convective timing ahead of market resolution.