Official measurements from the Japan Meteorological Agency at the Tokyo station confirm a daily maximum of exactly 27°C on May 31, driving the market's near-certain consensus on that outcome. Preceding forecasts anticipated a peak near 29°C under partly cloudy conditions, yet stronger marine influence, increased afternoon cloud cover, and localized wind patterns moderated temperatures by roughly 2°C. This aligns with typical late-May variability in the region, where urban heat island effects and sea-breeze moderation often produce 1–3°C deviations from model guidance. No realistic post-observation adjustments remain possible, as resolution depends solely on the verified station reading.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Tokyo on May 31?
Highest temperature in Tokyo on May 31?
27°C 100.0%
21°C or below <1%
22°C <1%
23°C <1%
$110,221 Vol.
$110,221 Vol.
May 31, 2026
21°C or below
No
22°C
No
23°C
No
24°C
No
25°C
No
26°C
No
27°C
Yes
28°C
No
29°C
No
30°C
No
31°C or higher
No
27°C 100.0%
21°C or below <1%
22°C <1%
23°C <1%
$110,221 Vol.
$110,221 Vol.
May 31, 2026
21°C or below
$326 Vol.
No
22°C
$341 Vol.
No
23°C
$1,116 Vol.
No
24°C
$24,286 Vol.
No
25°C
$12,940 Vol.
No
26°C
$14,124 Vol.
No
27°C
$14,983 Vol.
Yes
28°C
$10,919 Vol.
No
29°C
$11,346 Vol.
No
30°C
$8,669 Vol.
No
31°C or higher
$11,171 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the Tokyo Haneda Airport Station in degrees Celsius on 31 May '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 Tokyo Haneda Airport Station, available here: https://www.wunderground.com/history/daily/jp/tokyo/RJTT.
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.Official measurements from the Japan Meteorological Agency at the Tokyo station confirm a daily maximum of exactly 27°C on May 31, driving the market's near-certain consensus on that outcome. Preceding forecasts anticipated a peak near 29°C under partly cloudy conditions, yet stronger marine influence, increased afternoon cloud cover, and localized wind patterns moderated temperatures by roughly 2°C. This aligns with typical late-May variability in the region, where urban heat island effects and sea-breeze moderation often produce 1–3°C deviations from model guidance. No realistic post-observation adjustments remain possible, as resolution depends solely on the verified station reading.
This market will resolve to the temperature range that contains the highest temperature recorded at the Tokyo Haneda Airport Station in degrees Celsius on 31 May '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 Tokyo Haneda Airport Station, available here: https://www.wunderground.com/history/daily/jp/tokyo/RJTT.
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.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Tokyo Haneda Airport Station, available here: https://www.wunderground.com/history/daily/jp/tokyo/RJTT.
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.
Market Opened: May 29, 2026, 12:06 AM ET
Volume
$110,221End Date
May 31, 2026Market Opened
May 29, 2026, 12:06 AM ETResolution Source
https://www.wunderground.com/history/daily/jp/tokyo/RJTTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the Tokyo Haneda Airport Station in degrees Celsius on 31 May '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 Tokyo Haneda Airport Station, available here: https://www.wunderground.com/history/daily/jp/tokyo/RJTT.
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.Official measurements from the Japan Meteorological Agency at the Tokyo station confirm a daily maximum of exactly 27°C on May 31, driving the market's near-certain consensus on that outcome. Preceding forecasts anticipated a peak near 29°C under partly cloudy conditions, yet stronger marine influence, increased afternoon cloud cover, and localized wind patterns moderated temperatures by roughly 2°C. This aligns with typical late-May variability in the region, where urban heat island effects and sea-breeze moderation often produce 1–3°C deviations from model guidance. No realistic post-observation adjustments remain possible, as resolution depends solely on the verified station reading.
This market will resolve to the temperature range that contains the highest temperature recorded at the Tokyo Haneda Airport Station in degrees Celsius on 31 May '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 Tokyo Haneda Airport Station, available here: https://www.wunderground.com/history/daily/jp/tokyo/RJTT.
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.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Tokyo Haneda Airport Station, available here: https://www.wunderground.com/history/daily/jp/tokyo/RJTT.
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
$110,221End Date
May 31, 2026Market Opened
May 29, 2026, 12:06 AM ETResolution Source
https://www.wunderground.com/history/daily/jp/tokyo/RJTTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official measurements from the Japan Meteorological Agency at the Tokyo station confirm a daily maximum of exactly 27°C on May 31, driving the market's near-certain consensus on that outcome. Preceding forecasts anticipated a peak near 29°C under partly cloudy conditions, yet stronger marine influence, increased afternoon cloud cover, and localized wind patterns moderated temperatures by roughly 2°C. This aligns with typical late-May variability in the region, where urban heat island effects and sea-breeze moderation often produce 1–3°C deviations from model guidance. No realistic post-observation adjustments remain possible, as resolution depends solely on the verified station reading.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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