Japan Meteorological Agency observations confirm Tokyo's highest temperature reached precisely 18°C mid-afternoon on March 28 amid mild southerly winds and partial cloud cover, driving trader consensus to 100% implied probability on this outcome. This aligns with JMA's latest forecast—issued at 17:00 JST showing cloudy conditions clearing later—and ensemble model runs from NOAA and ECMWF, which project no further warming due to a weakening high-pressure ridge ushering cooler maritime air from the Pacific as sunset nears around 18:20 JST. March climatology at Haneda Airport station rarely sees highs above 20°C without föhn effects, absent in current upper-air patterns. Only an improbable rapid clearing enabling adiabatic compression could challenge this, but real-time satellite data indicates persistent overcast; final JMA daily verification posts tomorrow.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Tokyo on March 28?
Highest temperature in Tokyo on March 28?
18°C 100.0%
19°C <1%
20°C <1%
21°C or higher <1%
$178,304 Vol.
$178,304 Vol.
18°C
100%
19°C
<1%
20°C
<1%
21°C or higher
<1%
18°C 100.0%
19°C <1%
20°C <1%
21°C or higher <1%
$178,304 Vol.
$178,304 Vol.
18°C
100%
19°C
<1%
20°C
<1%
21°C or higher
<1%
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 24, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/jp/tokyo/RJTTResolver
0x69c47De9D...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...Japan Meteorological Agency observations confirm Tokyo's highest temperature reached precisely 18°C mid-afternoon on March 28 amid mild southerly winds and partial cloud cover, driving trader consensus to 100% implied probability on this outcome. This aligns with JMA's latest forecast—issued at 17:00 JST showing cloudy conditions clearing later—and ensemble model runs from NOAA and ECMWF, which project no further warming due to a weakening high-pressure ridge ushering cooler maritime air from the Pacific as sunset nears around 18:20 JST. March climatology at Haneda Airport station rarely sees highs above 20°C without föhn effects, absent in current upper-air patterns. Only an improbable rapid clearing enabling adiabatic compression could challenge this, but real-time satellite data indicates persistent overcast; final JMA daily verification posts tomorrow.
Experimental AI-generated summary referencing Polymarket data · Updated
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