Trader consensus on Polymarket heavily favors a 14°C high temperature in London at 59.5% implied probability, driven by the latest Met Office short-range forecast models projecting a daytime maximum near this value under partly cloudy conditions with a weakening rain band moving southeast. This aligns with early April climatological averages of 13–15°C at London Heathrow, the official recording station, where highs typically rise gradually amid transitional spring weather patterns featuring Atlantic influences that cap solar heating via persistent cloud cover. Following March's mild spell with peaks near 19°C, recent model ensembles indicate moderated conditions with light showers possible, though clearer intervals could push toward 15°C (28.5%). Real-time Met Office observations throughout the day will clarify final outcomes amid inherent forecast uncertainty.