Trader consensus on Polymarket tilts toward an 18°C high in Tokyo on March 28 at 43.5% implied probability, narrowly ahead of 17°C at 35.5%, reflecting the Japan Meteorological Agency's latest forecast models showing a peak near 18°C under high-pressure dominance and mild southerly winds enhancing daytime warming. Ensemble predictions from JMA indicate a tight spread of 16–19°C, driven by abundant sunshine, low cloud cover observed via satellite, and urban heat island effects amplifying temperatures in central Tokyo. Recent observational data from Haneda and Narita stations confirm overnight lows around 10–12°C, setting up a 6–8°C diurnal range typical for late March. Updated guidance expected midday could refine this; historical March norms average 13–15°C, but this season's warmer baseline adds upside risk to 19°C or higher.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Tokyo on March 28?
Highest temperature in Tokyo on March 28?
18°C 44%
17°C 36%
19°C 13%
20°C 4.0%
$41,878 Vol.
$41,878 Vol.
11°C or below
<1%
12°C
<1%
13°C
1%
14°C
<1%
15°C
1%
16°C
4%
17°C
36%
18°C
44%
19°C
13%
20°C
4%
21°C or higher
1%
18°C 44%
17°C 36%
19°C 13%
20°C 4.0%
$41,878 Vol.
$41,878 Vol.
11°C or below
<1%
12°C
<1%
13°C
1%
14°C
<1%
15°C
1%
16°C
4%
17°C
36%
18°C
44%
19°C
13%
20°C
4%
21°C or higher
1%
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...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 tilts toward an 18°C high in Tokyo on March 28 at 43.5% implied probability, narrowly ahead of 17°C at 35.5%, reflecting the Japan Meteorological Agency's latest forecast models showing a peak near 18°C under high-pressure dominance and mild southerly winds enhancing daytime warming. Ensemble predictions from JMA indicate a tight spread of 16–19°C, driven by abundant sunshine, low cloud cover observed via satellite, and urban heat island effects amplifying temperatures in central Tokyo. Recent observational data from Haneda and Narita stations confirm overnight lows around 10–12°C, setting up a 6–8°C diurnal range typical for late March. Updated guidance expected midday could refine this; historical March norms average 13–15°C, but this season's warmer baseline adds upside risk to 19°C or higher.
Experimental AI-generated summary referencing Polymarket data · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions