Trader consensus on Polymarket closely splits between 24°C (40.5% implied probability) and 23°C (37.5%), mirroring the Japan Meteorological Agency's (JMA) latest forecast of a daytime high near 23°C under partly cloudy skies for April 19, with minimal precipitation risk. Recent Tokyo observations—highs of about 18°C on April 17 and 21°C on April 18—came in cooler than expected amid lingering clouds, but a building high-pressure ridge signals sunnier conditions tomorrow, enhancing solar insolation. Differentiating factors include cloud cover variability (thinner layers could push 24°C via urban heat island amplification) versus earlier sea breeze arrival capping at 23°C through evaporative cooling. Model ensembles show this 1°C spread, with JMA updates overnight potentially tipping sentiment; historical mid-April averages sit at 19°C, but 2026's warmer spring baseline elevates odds.
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 19?
Highest temperature in Tokyo on April 19?
24°C 40%
23°C 36%
25°C 11%
22°C 10%
$22,818 Vol.
$22,818 Vol.
16°C or below
<1%
17°C
<1%
18°C
<1%
19°C
1%
20°C
1%
21°C
1%
22°C
10%
23°C
36%
24°C
40%
25°C
11%
26°C or higher
6%
24°C 40%
23°C 36%
25°C 11%
22°C 10%
$22,818 Vol.
$22,818 Vol.
16°C or below
<1%
17°C
<1%
18°C
<1%
19°C
1%
20°C
1%
21°C
1%
22°C
10%
23°C
36%
24°C
40%
25°C
11%
26°C or higher
6%
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 17, 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...Trader consensus on Polymarket closely splits between 24°C (40.5% implied probability) and 23°C (37.5%), mirroring the Japan Meteorological Agency's (JMA) latest forecast of a daytime high near 23°C under partly cloudy skies for April 19, with minimal precipitation risk. Recent Tokyo observations—highs of about 18°C on April 17 and 21°C on April 18—came in cooler than expected amid lingering clouds, but a building high-pressure ridge signals sunnier conditions tomorrow, enhancing solar insolation. Differentiating factors include cloud cover variability (thinner layers could push 24°C via urban heat island amplification) versus earlier sea breeze arrival capping at 23°C through evaporative cooling. Model ensembles show this 1°C spread, with JMA updates overnight potentially tipping sentiment; historical mid-April averages sit at 19°C, but 2026's warmer spring baseline elevates odds.
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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