Trader consensus on Polymarket assigns a near-certain 100% implied probability to a highest temperature of 20°C at Tokyo's Haneda Airport station on April 27, driven by the latest Japan Meteorological Agency (JMA) forecast indicating rain turning cloudy later, with a daytime high of 18–21°C under persistent overcast skies and precipitation probabilities exceeding 50% midday. This positioning reflects current observations peaking near 20°C amid cool sea breezes and limited solar heating, consistent with late-April climatology where historical highs average 21°C but cloud-induced suppression is common. Realistic challenges include unexpected afternoon clearing boosting insolation to exceed 21°C, though diminishing sun angles and model ensembles (ECMWF, GFS) show low likelihood; monitor JMA's evening update for resolution.
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 April 27?
20°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$263,053 Vol.
$263,053 Vol.
11°C or below
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
Yes
21°C or higher
No
20°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$263,053 Vol.
$263,053 Vol.
11°C or below
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
Yes
21°C or higher
No
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Tokyo Haneda Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Apr 25, 2026, 12:53 AM ET
Resolution Source
https://www.wunderground.com/history/daily/jp/tokyo/RJTTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Tokyo Haneda Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Resolution Source
https://www.wunderground.com/history/daily/jp/tokyo/RJTTResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Trader consensus on Polymarket assigns a near-certain 100% implied probability to a highest temperature of 20°C at Tokyo's Haneda Airport station on April 27, driven by the latest Japan Meteorological Agency (JMA) forecast indicating rain turning cloudy later, with a daytime high of 18–21°C under persistent overcast skies and precipitation probabilities exceeding 50% midday. This positioning reflects current observations peaking near 20°C amid cool sea breezes and limited solar heating, consistent with late-April climatology where historical highs average 21°C but cloud-induced suppression is common. Realistic challenges include unexpected afternoon clearing boosting insolation to exceed 21°C, though diminishing sun angles and model ensembles (ECMWF, GFS) show low likelihood; monitor JMA's evening update for resolution.
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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