Trader consensus on Polymarket heavily favors a Tokyo high of 18°C at 33.5% implied probability, driven by the latest Japan Meteorological Agency (JMA) and ECMWF model runs projecting mild highs under a building high-pressure ridge over the Kanto region. Differentiating the close 16–18°C cluster, ensemble forecasts show a 1–2°C spread due to varying cloud cover predictions and southerly sea breeze influences, with urban heat island effects potentially pushing peaks higher amid low wind shear. Historical March 28 averages hover at 13–14°C, but recent synoptic patterns—warmer Pacific air advection—tilt odds toward the upper end, though short-range updates tomorrow could shift diurnal maximums by 1°C.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Tokyo on March 28?
Highest temperature in Tokyo on March 28?
18°C 27%
17°C 24%
16°C 23%
19°C 17%
11°C or below
2%
12°C
7%
13°C
8%
14°C
8%
15°C
11%
16°C
25%
17°C
24%
18°C
34%
19°C
17%
20°C
8%
21°C or higher
7%
18°C 27%
17°C 24%
16°C 23%
19°C 17%
11°C or below
2%
12°C
7%
13°C
8%
14°C
8%
15°C
11%
16°C
25%
17°C
24%
18°C
34%
19°C
17%
20°C
8%
21°C or higher
7%
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...Resolution Source
https://www.wunderground.com/history/daily/jp/tokyo/RJTTResolver
0x69c47De9D...Trader consensus on Polymarket heavily favors a Tokyo high of 18°C at 33.5% implied probability, driven by the latest Japan Meteorological Agency (JMA) and ECMWF model runs projecting mild highs under a building high-pressure ridge over the Kanto region. Differentiating the close 16–18°C cluster, ensemble forecasts show a 1–2°C spread due to varying cloud cover predictions and southerly sea breeze influences, with urban heat island effects potentially pushing peaks higher amid low wind shear. Historical March 28 averages hover at 13–14°C, but recent synoptic patterns—warmer Pacific air advection—tilt odds toward the upper end, though short-range updates tomorrow could shift diurnal maximums by 1°C.
Experimental AI-generated summary referencing Polymarket data · Updated
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