**Market-implied odds favor a Tokyo minimum temperature of 24°C on August 3, 2026 (60.5% implied probability), with 23°C as the next most likely outcome (21.0%).** These probabilities reflect trader consensus on typical early-August conditions in the Japanese capital, where overnight lows are shaped by the seasonal strength of the Pacific High, which suppresses cloud cover and allows moderate radiational cooling after daytime highs often exceed 32–35°C. Japan Meteorological Agency seasonal outlooks for summer 2026 indicate above-normal temperatures across Honshu, consistent with an earlier end to the rainy season and persistent subtropical high pressure. Historical climatology for Tokyo shows average August minimums near 24–25°C (76°F), with urban heat-island effects and high humidity (often >75%) limiting nocturnal cooling. Short-range forecast variability over the next 48 hours will hinge on any passing frontal systems or changes in wind patterns that could nudge the minimum a degree lower or higher. Updated model runs from agencies such as the JMA or NOAA will provide the key data points traders monitor for shifts in these tight probabilities.