This market will resolve based on the lowest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section. This market will resolve to the temperature range that contains the lowest temperature recorded at the London City Airport Station in degrees Celsius on 13 Aug '26. The resolution source for this market will be information from Wunderground, specifically the lowest temperature recorded for all times on this day for the London City Airport Station, available here: https://www.wunderground.com/history/daily/gb/london/EGLC. To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C. This market can not resolve until the first data point for the following date has been published on the resolution source. The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market. Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Recent Met Office forecasts and ensemble model consensus for London on August 13, 2026, indicate overnight lows stabilizing near 18–20°C amid the current heatwave, with daytime peaks reaching 38°C in the capital. This positions 18°C as the market-implied outcome for the daily minimum, reflecting verified observational baselines from urban monitoring stations and typical August nocturnal cooling rates under high-pressure conditions. Traders' overwhelming consensus incorporates historical climatology showing rare sub-17°C lows during such warm spells. Unseasonal increases in cloud cover, stronger winds, or localized measurement differences at official sites could realistically shift the recorded low into adjacent bins, though current guidance shows limited divergence.