This market will resolve based on the highest 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 highest temperature recorded at the London City Airport Station in degrees Celsius on 22 Aug '26. The resolution source for this market will be information from Wunderground, specifically the highest 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.
Current short-range forecasts from the Met Office and BBC indicate a maximum of 21–22°C in London on August 22 under sunny intervals and light northerly winds, following a cooling trend after earlier August heat spikes. Ensemble guidance shows limited warm-air advection and modest afternoon cloud development that could cap temperatures near these values. Differentiation among the closely matched 21–23°C outcomes depends on exact timing of any showers and boundary-layer mixing, with climatological August highs averaging 21–22°C providing baseline context. Official Met Office station observations will determine resolution amid typical model spread at this lead time.