- Will the highest temperature in London be 16°C or below on September 8?<1¢
- Will the highest temperature in London be 17°C on September 8?3¢
- Will the highest temperature in London be 18°C on September 8?6¢
- Will the highest temperature in London be 19°C on September 8?23¢
- Will the highest temperature in London be 20°C on September 8?36¢
- Will the highest temperature in London be 21°C on September 8?22¢
- Will the highest temperature in London be 22°C on September 8?7¢
- Will the highest temperature in London be 23°C on September 8?3¢
- Will the highest temperature in London be 24°C on September 8?<1¢
- Will the highest temperature in London be 25°C on September 8?<1¢
- Will the highest temperature in London be 26°C or higher on September 8?<1¢
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the London City Airport Station in degrees Celsius on 8 Sep '26. The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=eglc If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source. In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket. To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C. This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first. 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.
Forecast consensus from major models positions 20°C as the leading outcome for London's highest temperature on September 8. The Met Office and supporting runs from ECMWF and GFS indicate a transition to cooler, breezier conditions behind an Atlantic front, with daytime maxima reaching 20–21°C after early cloud and light rain clear. Monday's warmer setup (around 24–25°C) gives way to westerly flow and reduced humidity, limiting afternoon warming despite some sunny spells. Traders' heavy weighting toward 19–21°C reflects this stable short-range guidance, with limited upside risk from delayed clearing or model spread. The Met Office issues updated forecasts daily, including detailed hourly guidance, which will refine exact peak timing and any revisions before resolution.