Highest temperature in London on October 20? is a closed prediction market event on Polymarket with 7 markets, $120.4K total volume, and N/A in liquidity. Key markets: Will the highest temperature in London be 52°F or below on October 20?; Will the highest temperature in London be between 53-54°F on October 20?; Will the highest temperature in London be between 55-56°F on October 20?.