The Japan Meteorological Agency's (JMA) most recent forecast projects Tokyo's highest temperature on April 17 at 21°C amid cloudy conditions gradually clearing to occasional sun, yet trader consensus clusters tightly around 18°C (31.5%) and 19°C (30.5%), reflecting inherent uncertainty in spring weather models and partial cloud cover potentially capping peak insolation. Recent highs have hovered near 20-22°C over the past two days under similar mild high-pressure influence, with northerly winds and 60-70% precipitation chances introducing variability that differentiates outcomes—greater clearing favors 20°C+, while persistent overcast limits to 17-18°C. Historical mid-April averages sit at 19°C, boosted by Tokyo's urban heat island; watch JMA's April 16 update for refined ensemble guidance from global models like ECMWF and GFS.
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 17?
Highest temperature in Tokyo on April 17?
18°C 33%
19°C 33%
17°C 18%
20°C 10%
12°C or below
<1%
13°C
<1%
14°C
1%
15°C
2%
16°C
4%
17°C
18%
18°C
33%
19°C
33%
20°C
10%
21°C
8%
22°C or higher
5%
18°C 33%
19°C 33%
17°C 18%
20°C 10%
12°C or below
<1%
13°C
<1%
14°C
1%
15°C
2%
16°C
4%
17°C
18%
18°C
33%
19°C
33%
20°C
10%
21°C
8%
22°C or higher
5%
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 15, 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 Japan Meteorological Agency's (JMA) most recent forecast projects Tokyo's highest temperature on April 17 at 21°C amid cloudy conditions gradually clearing to occasional sun, yet trader consensus clusters tightly around 18°C (31.5%) and 19°C (30.5%), reflecting inherent uncertainty in spring weather models and partial cloud cover potentially capping peak insolation. Recent highs have hovered near 20-22°C over the past two days under similar mild high-pressure influence, with northerly winds and 60-70% precipitation chances introducing variability that differentiates outcomes—greater clearing favors 20°C+, while persistent overcast limits to 17-18°C. Historical mid-April averages sit at 19°C, boosted by Tokyo's urban heat island; watch JMA's April 16 update for refined ensemble guidance from global models like ECMWF and GFS.
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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