The latest Japan Meteorological Agency forecast, issued April 30 at 22:00, projects Tokyo's May 1 high at 27°C under rain transitioning to cloudy skies with 90-100% precipitation odds early, potentially capping temperatures via cloud cover and showers; however, concurrent tenki.jp guidance (drawing on JMA data) tempers this to 22°C max amid intermittent rain and thunderstorm risks, while global models like ECMWF and GFS ensembles lean toward 19-21°C with overcast or t-storm conditions. This spread reflects spring frontal activity over a warmer-than-normal April (+1.7°C anomaly), positioning trader consensus—21°C or higher at 42%, 20°C at 29.5%, 19°C at 24.5%—around historical early-May averages of 20-22°C. Final JMA refinements and observations will sharpen resolution amid inherent short-range forecast uncertainty.
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 May 1?
Highest temperature in Tokyo on May 1?
21°C or higher 41.9%
20°C 30%
19°C 26%
18°C 5.8%
$41,649 Vol.
$41,649 Vol.
11°C or below
<1%
12°C
<1%
13°C
<1%
14°C
<1%
15°C
<1%
16°C
<1%
17°C
1%
18°C
6%
19°C
26%
20°C
30%
21°C or higher
42%
21°C or higher 41.9%
20°C 30%
19°C 26%
18°C 5.8%
$41,649 Vol.
$41,649 Vol.
11°C or below
<1%
12°C
<1%
13°C
<1%
14°C
<1%
15°C
<1%
16°C
<1%
17°C
1%
18°C
6%
19°C
26%
20°C
30%
21°C or higher
42%
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 29, 2026, 12:06 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...The latest Japan Meteorological Agency forecast, issued April 30 at 22:00, projects Tokyo's May 1 high at 27°C under rain transitioning to cloudy skies with 90-100% precipitation odds early, potentially capping temperatures via cloud cover and showers; however, concurrent tenki.jp guidance (drawing on JMA data) tempers this to 22°C max amid intermittent rain and thunderstorm risks, while global models like ECMWF and GFS ensembles lean toward 19-21°C with overcast or t-storm conditions. This spread reflects spring frontal activity over a warmer-than-normal April (+1.7°C anomaly), positioning trader consensus—21°C or higher at 42%, 20°C at 29.5%, 19°C at 24.5%—around historical early-May averages of 20-22°C. Final JMA refinements and observations will sharpen resolution amid inherent short-range forecast uncertainty.
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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