Trader consensus on Polymarket heavily favors 14°C (46.5%) and 13°C (34.5%) as London's highest temperature today, driven by the Met Office's morning forecast update pegging the maximum at 14°C amid light showers and cloudy skies over Greater London and Heathrow Airport. A lingering low-pressure system nearby has ushered in cool, unsettled conditions with northerly winds and scattered precipitation, suppressing daytime heating despite occasional sunny spells—extending a chilly pattern from the past week where highs hovered around 10-11°C. This positions outcomes well below the mid-May climatological average of 17°C, with model consensus showing limited upside potential due to persistent cloud cover. Hourly observations and afternoon updates from official monitoring sites will be key, as small shifts in shower timing could tip the peak between 13-14°C.