Recent Japan Meteorological Agency forecasts highlight persistent cloud cover and scattered showers over Tokyo on June 21, stemming from the ongoing tsuyu rainy season, as the primary driver capping trader-implied highs near 25–26 °C. These conditions reduce solar insolation and enhance evaporative cooling, preventing the stronger afternoon heating typical of clearer early-summer days when maxima often reach 28–30 °C. Seasonal outlooks note above-average temperatures overall, yet short-term model consensus emphasizes variable shower timing and intensity as key uncertainties that could shift the daily peak by 1–2 °C. This genuine forecast spread explains the closely matched market probabilities clustered around historical June averages.
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 June 21?
Highest temperature in Tokyo on June 21?
26°C 100.0%
20°C or below <1%
21°C <1%
22°C <1%
$135,838 Vol.
$135,838 Vol.
Jun 21, 2026
20°C or below
No
21°C
No
22°C
No
23°C
No
24°C
No
25°C
No
26°C
Yes
27°C
No
28°C
No
29°C
No
30°C or higher
No
26°C 100.0%
20°C or below <1%
21°C <1%
22°C <1%
$135,838 Vol.
$135,838 Vol.
Jun 21, 2026
20°C or below
$1,833 Vol.
No
21°C
$1,845 Vol.
No
22°C
$8,617 Vol.
No
23°C
$4,947 Vol.
No
24°C
$15,583 Vol.
No
25°C
$38,379 Vol.
No
26°C
$22,125 Vol.
Yes
27°C
$9,712 Vol.
No
28°C
$10,336 Vol.
No
29°C
$9,049 Vol.
No
30°C or higher
$13,414 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 21 Jun '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.Recent Japan Meteorological Agency forecasts highlight persistent cloud cover and scattered showers over Tokyo on June 21, stemming from the ongoing tsuyu rainy season, as the primary driver capping trader-implied highs near 25–26 °C. These conditions reduce solar insolation and enhance evaporative cooling, preventing the stronger afternoon heating typical of clearer early-summer days when maxima often reach 28–30 °C. Seasonal outlooks note above-average temperatures overall, yet short-term model consensus emphasizes variable shower timing and intensity as key uncertainties that could shift the daily peak by 1–2 °C. This genuine forecast spread explains the closely matched market probabilities clustered around historical June averages.
This market will resolve to the temperature range that contains the highest temperature recorded at the Tokyo Haneda Airport Station in degrees Celsius on 21 Jun '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: Jun 19, 2026, 12:03 AM ET
Volume
$135,838End Date
Jun 21, 2026Market Opened
Jun 19, 2026, 12:03 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 21 Jun '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.Recent Japan Meteorological Agency forecasts highlight persistent cloud cover and scattered showers over Tokyo on June 21, stemming from the ongoing tsuyu rainy season, as the primary driver capping trader-implied highs near 25–26 °C. These conditions reduce solar insolation and enhance evaporative cooling, preventing the stronger afternoon heating typical of clearer early-summer days when maxima often reach 28–30 °C. Seasonal outlooks note above-average temperatures overall, yet short-term model consensus emphasizes variable shower timing and intensity as key uncertainties that could shift the daily peak by 1–2 °C. This genuine forecast spread explains the closely matched market probabilities clustered around historical June averages.
This market will resolve to the temperature range that contains the highest temperature recorded at the Tokyo Haneda Airport Station in degrees Celsius on 21 Jun '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
$135,838End Date
Jun 21, 2026Market Opened
Jun 19, 2026, 12:03 AM ETResolution Source
https://www.wunderground.com/history/daily/jp/tokyo/RJTTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent Japan Meteorological Agency forecasts highlight persistent cloud cover and scattered showers over Tokyo on June 21, stemming from the ongoing tsuyu rainy season, as the primary driver capping trader-implied highs near 25–26 °C. These conditions reduce solar insolation and enhance evaporative cooling, preventing the stronger afternoon heating typical of clearer early-summer days when maxima often reach 28–30 °C. Seasonal outlooks note above-average temperatures overall, yet short-term model consensus emphasizes variable shower timing and intensity as key uncertainties that could shift the daily peak by 1–2 °C. This genuine forecast spread explains the closely matched market probabilities clustered around historical June averages.
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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