Latest ensemble forecasts from global models place Tokyo’s overnight minimum on June 30 near 21–22 °C, creating the tight 50 % market split between those two outcomes. Nighttime radiative cooling will be modulated by variable cloud cover and boundary-layer wind speeds: clearer skies and lighter winds promote stronger long-wave heat loss and lower minima, while increased low-level moisture or a strengthening sea breeze reduces cooling and favors 22 °C. With the Pacific high building and the rainy season tapering, forecasters anticipate modest day-to-day adjustments in humidity and cloud fields that could shift the final reading by 1 °C either way before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Tokyo on June 30?
Lowest temperature in Tokyo on June 30?
22°C 100.0%
16°C or below <1%
17°C <1%
18°C <1%
$11,648 Vol.
$11,648 Vol.
Jun 30, 2026
16°C or below
No
17°C
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
Yes
23°C
No
24°C
No
25°C
No
26°C or higher
No
22°C 100.0%
16°C or below <1%
17°C <1%
18°C <1%
$11,648 Vol.
$11,648 Vol.
Jun 30, 2026
16°C or below
$655 Vol.
No
17°C
$670 Vol.
No
18°C
$806 Vol.
No
19°C
$992 Vol.
No
20°C
$855 Vol.
No
21°C
$1,991 Vol.
No
22°C
$1,852 Vol.
Yes
23°C
$1,319 Vol.
No
24°C
$758 Vol.
No
25°C
$1,101 Vol.
No
26°C or higher
$648 Vol.
No
This market will resolve to the temperature range that contains the lowest temperature recorded at the Tokyo Haneda Airport Station in degrees Celsius on 30 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the lowest 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.Latest ensemble forecasts from global models place Tokyo’s overnight minimum on June 30 near 21–22 °C, creating the tight 50 % market split between those two outcomes. Nighttime radiative cooling will be modulated by variable cloud cover and boundary-layer wind speeds: clearer skies and lighter winds promote stronger long-wave heat loss and lower minima, while increased low-level moisture or a strengthening sea breeze reduces cooling and favors 22 °C. With the Pacific high building and the rainy season tapering, forecasters anticipate modest day-to-day adjustments in humidity and cloud fields that could shift the final reading by 1 °C either way before resolution.
This market will resolve to the temperature range that contains the lowest temperature recorded at the Tokyo Haneda Airport Station in degrees Celsius on 30 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the lowest 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 lowest 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 28, 2026, 12:30 AM ET
Volume
$11,648End Date
Jun 30, 2026Market Opened
Jun 28, 2026, 12:30 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 lowest temperature recorded at the Tokyo Haneda Airport Station in degrees Celsius on 30 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the lowest 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.Latest ensemble forecasts from global models place Tokyo’s overnight minimum on June 30 near 21–22 °C, creating the tight 50 % market split between those two outcomes. Nighttime radiative cooling will be modulated by variable cloud cover and boundary-layer wind speeds: clearer skies and lighter winds promote stronger long-wave heat loss and lower minima, while increased low-level moisture or a strengthening sea breeze reduces cooling and favors 22 °C. With the Pacific high building and the rainy season tapering, forecasters anticipate modest day-to-day adjustments in humidity and cloud fields that could shift the final reading by 1 °C either way before resolution.
This market will resolve to the temperature range that contains the lowest temperature recorded at the Tokyo Haneda Airport Station in degrees Celsius on 30 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the lowest 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 lowest 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
$11,648End Date
Jun 30, 2026Market Opened
Jun 28, 2026, 12:30 AM ETResolution Source
https://www.wunderground.com/history/daily/jp/tokyo/RJTTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Latest ensemble forecasts from global models place Tokyo’s overnight minimum on June 30 near 21–22 °C, creating the tight 50 % market split between those two outcomes. Nighttime radiative cooling will be modulated by variable cloud cover and boundary-layer wind speeds: clearer skies and lighter winds promote stronger long-wave heat loss and lower minima, while increased low-level moisture or a strengthening sea breeze reduces cooling and favors 22 °C. With the Pacific high building and the rainy season tapering, forecasters anticipate modest day-to-day adjustments in humidity and cloud fields that could shift the final reading by 1 °C either way before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions