San Francisco's spring weather in mid-April typically brings mild conditions, with historical high temperatures ranging from the mid-50s to low 60s Fahrenheit. This market question asks whether the highest temperature on April 18, 2026, will fall within the specific 58-59°F band. With current YES odds at 1%, the market is pricing this narrow range as unlikely, suggesting traders expect either warmer spring conditions in the low 60s or cooler days in the mid-50s. April data for San Francisco shows that high temperatures most frequently cluster around 60-65°F, making the 58-59°F window plausible but not the most probable outcome. The market's resolution is clear and verifiable: the National Weather Service will provide the official high temperature for San Francisco on April 18, and the outcome resolves accordingly. This type of precision weather market appeals to traders with specific temperature forecasts or those seeking to express granular weather views. The $1,003 daily volume reflects the niche appeal of daily temperature trading, while the $9,339 liquidity provides traders with adequate depth to enter and exit positions without excessive slippage. Such markets enable prediction market participants to engage with detailed meteorological data.