Current forecasts from Taiwan’s Central Weather Administration place Taipei’s May 22 daytime maximum near 32–34 °C beneath a subtropical ridge that promotes light southerly flow and partly cloudy skies. This positioning creates tight market clustering around those outcomes because modest differences in afternoon convective timing or boundary-layer mixing can shift the official high by 1–2 °C. Model consensus shows limited disagreement on steering patterns, yet uncertainty persists over exact cloud cover and localized thunderstorm development, which historically cap peaks during the early plum-rain transition. Traders weigh these variables against May climatology, where average highs near 29 °C rise under similar ridge setups, supporting the observed spread across the 31–34 °C bins.