Trader consensus on Polymarket has locked in a 100% implied probability for Tokyo's highest temperature reaching exactly 16°C on April 30, 2026, driven by the latest Japan Meteorological Agency (JMA) forecasts and global models projecting a daytime maximum of 16°C under overcast conditions and a passing cool air mass. Observations so far align with this, showing morning lows around 11°C and limited solar heating due to persistent cloud cover, well below the April climatological average high of 22°C. This positioning reflects strong alignment across ensemble forecast models with minimal divergence. Realistic challenges would require sudden clearing skies for enhanced insolation or urban heat island effects pushing readings higher, though diurnal patterns and current atmospheric stability make this unlikely; final official measurement from Tokyo's central station will resolve the market by day's end.
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 30?
16°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$136,768 Vol.
$136,768 Vol.
11°C or below
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
Yes
17°C
No
18°C
No
19°C
No
20°C
No
21°C or higher
No
16°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$136,768 Vol.
$136,768 Vol.
11°C or below
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
Yes
17°C
No
18°C
No
19°C
No
20°C
No
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 28, 2026, 3:38 PM 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 has locked in a 100% implied probability for Tokyo's highest temperature reaching exactly 16°C on April 30, 2026, driven by the latest Japan Meteorological Agency (JMA) forecasts and global models projecting a daytime maximum of 16°C under overcast conditions and a passing cool air mass. Observations so far align with this, showing morning lows around 11°C and limited solar heating due to persistent cloud cover, well below the April climatological average high of 22°C. This positioning reflects strong alignment across ensemble forecast models with minimal divergence. Realistic challenges would require sudden clearing skies for enhanced insolation or urban heat island effects pushing readings higher, though diurnal patterns and current atmospheric stability make this unlikely; final official measurement from Tokyo's central station will resolve the market by day's end.
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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