Recent Japan Meteorological Agency forecasts indicate overnight lows near 18–19°C for Tokyo on June 12 under persistent cloudy skies marking the early tsuyu rainy season, limiting nocturnal radiative cooling relative to clearer conditions. These align with seasonal norms where June minimums typically range 18–20°C amid moderate humidity and weak frontal influences from the Pacific high. The tight clustering of market-implied odds around 18–20°C reflects model consensus on stable atmospheric patterns, with differentiation hinging on precise cloud thickness, wind speed, and any last-minute precipitation that could enhance or suppress cooling. New JMA updates over the next 48 hours may shift probabilities as observational data refines the forecast.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Tokyo on June 12?
18°C 38%
19°C 30%
20°C 19%
17°C 7%
14°C or below
1%
15°C
2%
16°C
3%
17°C
7%
18°C
22%
19°C
30%
20°C
19%
21°C
2%
22°C
5%
23°C
1%
24°C or higher
<1%
18°C 38%
19°C 30%
20°C 19%
17°C 7%
14°C or below
1%
15°C
2%
16°C
3%
17°C
7%
18°C
22%
19°C
30%
20°C
19%
21°C
2%
22°C
5%
23°C
1%
24°C or higher
<1%
The resolution source for this market will be information from Wunderground, specifically the lowest temperature recorded for all times on this day for the Tokyo Haneda Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Jun 10, 2026, 12:31 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 lowest temperature recorded for all times on this day for the Tokyo Haneda Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Resolution Source
https://www.wunderground.com/history/daily/jp/tokyo/RJTTResolver
0x69c47De9D...Recent Japan Meteorological Agency forecasts indicate overnight lows near 18–19°C for Tokyo on June 12 under persistent cloudy skies marking the early tsuyu rainy season, limiting nocturnal radiative cooling relative to clearer conditions. These align with seasonal norms where June minimums typically range 18–20°C amid moderate humidity and weak frontal influences from the Pacific high. The tight clustering of market-implied odds around 18–20°C reflects model consensus on stable atmospheric patterns, with differentiation hinging on precise cloud thickness, wind speed, and any last-minute precipitation that could enhance or suppress cooling. New JMA updates over the next 48 hours may shift probabilities as observational data refines the forecast.
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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