**Persistent warm and humid conditions under the Southwest Monsoon are positioning 27–28°C as the most probable daily minimum for Singapore on August 26, 2026.** Official outlooks from Singapore’s weather service indicate that nights in the second half of August will remain above 27°C across most of the island amid prevailing southeasterly to southwesterly winds, localized afternoon thundery showers, and below-average rainfall overall. Multiple numerical forecasts converge on an overnight low near 27°C (roughly 82°F), consistent with recent observed minima that have stayed at or above this level on nearly all days this month. Recent data reinforce this outlook: the first half of August featured daily maxima frequently exceeding 33°C and minima mostly above 27°C, with only one brief dip to 26°C. Current model consensus shows no significant steering patterns or atmospheric cooling that would drive temperatures notably lower, while high humidity and cloud cover limit radiative cooling overnight. The 28°C outcome leads market-implied odds at 37.5% because it aligns closely with both the forecast range and the month’s elevated temperature baseline relative to the long-term August average minimum of ~25.3°C. Lower-probability outcomes such as 24°C or below (combined <30%) would require atypical radiative cooling or a transient shift in monsoon flow that current guidance does not support. Higher readings near 29–31°C remain possible if showers are limited and boundary-layer mixing persists, but the primary driver remains the established warm, stable nocturnal environment. Updated official forecasts and any late-model adjustments ahead of the 26th will be the key variables that could shift trader sentiment.