Japan Meteorological Agency (JMA) observations confirm Tokyo's highest temperature on March 27 reached exactly 16°C at the central station, driving trader consensus to a 100% implied probability for that outcome amid real-money positioning. Cool spring conditions prevailed, with partly cloudy skies, northerly winds around 5-10 km/h, and influence from a lingering cold air mass suppressing highs above seasonal norms of 12-15°C. Preliminary hourly data throughout the day showed peaks stabilizing near 16°C, eliminating realistic paths to warmer bins. While ultra-rare scenarios like post hoc instrument recalibration could prompt review, JMA's rigorous quality controls and historical verification rates under 0.1% make challenges negligible, cementing the market's resolution trajectory.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Tokyo on March 27?
Highest temperature in Tokyo on March 27?
16°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$171,670 Vol.
$171,670 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%
$171,670 Vol.
$171,670 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: Mar 23, 2026, 6:02 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
Japan Meteorological Agency (JMA) observations confirm Tokyo's highest temperature on March 27 reached exactly 16°C at the central station, driving trader consensus to a 100% implied probability for that outcome amid real-money positioning. Cool spring conditions prevailed, with partly cloudy skies, northerly winds around 5-10 km/h, and influence from a lingering cold air mass suppressing highs above seasonal norms of 12-15°C. Preliminary hourly data throughout the day showed peaks stabilizing near 16°C, eliminating realistic paths to warmer bins. While ultra-rare scenarios like post hoc instrument recalibration could prompt review, JMA's rigorous quality controls and historical verification rates under 0.1% make challenges negligible, cementing the market's resolution trajectory.
Experimental AI-generated summary referencing Polymarket data · Updated
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