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Highest temperature in London on August 23?

icon for Highest temperature in London on August 23?

Highest temperature in London on August 23?

24°C 38%

23°C 28%

25°C 17%

22°C 7%

Polymarket
NEW

24°C 38%

23°C 28%

25°C 17%

22°C 7%

Polymarket
NEW

20°C or below

$56 Vol.

1%

21°C

$51 Vol.

3%

22°C

$56 Vol.

7%

23°C

$204 Vol.

28%

24°C

$332 Vol.

38%

25°C

$110 Vol.

17%

26°C

$136 Vol.

5%

27°C

$283 Vol.

<1%

28°C

$200 Vol.

<1%

29°C

$156 Vol.

<1%

30°C or higher

$150 Vol.

<1%

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 23 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.**Recent forecasts from the Met Office and other sources indicate settled high-pressure conditions developing over the UK this weekend, favoring dry, bright weather with sunny spells for London on August 23.** This setup supports maximum temperatures near or slightly above the seasonal average of roughly 22–23°C, aligning with the market's tight clustering around 23–25°C. High pressure suppresses cloud formation and precipitation while allowing greater solar insolation during daylight hours, which helps drive daytime peaks higher than under a more unsettled, showery regime. Light winds or calm conditions under the ridge can further enhance surface heating by limiting mixing with cooler air aloft. Conversely, any lingering Atlantic moisture, increased cloud cover, or a slight shift in the high's position could cap the peak at 23°C or below by reducing net radiation. The closely matched probabilities for 23°C (28%) and 24°C (37.5%), with 25°C at 17%, reflect ensemble model spread in the precise timing and strength of this high-pressure build. Updated runs over the next 24–48 hours, particularly from the Met Office and ECMWF, will likely refine whether the peak reaches the upper or lower end of that narrow range before resolution.

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 23 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.
Volume
$1,733
End Date
Aug 23, 2026
Market Opened
Aug 21, 2026, 12:55 AM ET
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 23 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.
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 23 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.**Recent forecasts from the Met Office and other sources indicate settled high-pressure conditions developing over the UK this weekend, favoring dry, bright weather with sunny spells for London on August 23.** This setup supports maximum temperatures near or slightly above the seasonal average of roughly 22–23°C, aligning with the market's tight clustering around 23–25°C. High pressure suppresses cloud formation and precipitation while allowing greater solar insolation during daylight hours, which helps drive daytime peaks higher than under a more unsettled, showery regime. Light winds or calm conditions under the ridge can further enhance surface heating by limiting mixing with cooler air aloft. Conversely, any lingering Atlantic moisture, increased cloud cover, or a slight shift in the high's position could cap the peak at 23°C or below by reducing net radiation. The closely matched probabilities for 23°C (28%) and 24°C (37.5%), with 25°C at 17%, reflect ensemble model spread in the precise timing and strength of this high-pressure build. Updated runs over the next 24–48 hours, particularly from the Met Office and ECMWF, will likely refine whether the peak reaches the upper or lower end of that narrow range before resolution.

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 23 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.
Volume
$1,733
End Date
Aug 23, 2026
Market Opened
Aug 21, 2026, 12:55 AM ET
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 23 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.

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Frequently Asked Questions

"Highest temperature in London on August 23?" is a prediction market on Polymarket with 11 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "24°C" at 38%, followed by "23°C" at 28%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 38¢ implies that the market collectively assigns a 38% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"Highest temperature in London on August 23?" is a newly created market on Polymarket, launched on Aug 21, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "Highest temperature in London on August 23?," browse the 11 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Highest temperature in London on August 23?" is "24°C" at 38%, meaning the market assigns a 38% chance to that outcome. The next closest outcome is "23°C" at 28%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Highest temperature in London on August 23?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.