Highest temperature in London on March 19? is a active prediction market event on Polymarket with 11 markets, $198.1K total volume, and $142.8K in liquidity. Key markets: Will the highest temperature in London be 22°C or higher on March 19?; Will the highest temperature in London be 12°C or below on March 19?; Will the highest temperature in London be 13°C on March 19?.