Trader consensus on Polymarket tilts toward a 28°C high in Buenos Aires on March 18 (33.5% implied probability), narrowly edging out 29°C or higher (29.5%) and 27°C (21.5%), driven by the latest ensemble forecasts from ECMWF and GFS models showing peak afternoon surface temperatures around 28°C under persistent high-pressure ridging. Servicio Meteorológico Nacional projections align closely, factoring in light northerly winds and partial cloud cover that cap extremes, while historical March 18 averages hover at 27.5°C. Model spread introduces uncertainty—slight dry air advection could push to 29°C, but incoming marine influence favors moderation—keeping odds tight ahead of evening forecast updates.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Buenos Aires on March 18?
Highest temperature in Buenos Aires on March 18?
28°C 34%
29°C or higher 27%
27°C 22%
26°C 10%
$36,325 Vol.
$36,325 Vol.
19°C or below
1%
20°C
1%
21°C
<1%
22°C
<1%
23°C
1%
24°C
2%
25°C
4%
26°C
10%
27°C
22%
28°C
34%
29°C or higher
27%
28°C 34%
29°C or higher 27%
27°C 22%
26°C 10%
$36,325 Vol.
$36,325 Vol.
19°C or below
1%
20°C
1%
21°C
<1%
22°C
<1%
23°C
1%
24°C
2%
25°C
4%
26°C
10%
27°C
22%
28°C
34%
29°C or higher
27%
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 Minister Pistarini Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/ar/ezeiza/SAEZ.
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 14, 2026, 6:01 AM ET
Resolution Source
https://www.wunderground.com/history/daily/ar/ezeiza/SAEZResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/ar/ezeiza/SAEZResolver
0x69c47De9D...Trader consensus on Polymarket tilts toward a 28°C high in Buenos Aires on March 18 (33.5% implied probability), narrowly edging out 29°C or higher (29.5%) and 27°C (21.5%), driven by the latest ensemble forecasts from ECMWF and GFS models showing peak afternoon surface temperatures around 28°C under persistent high-pressure ridging. Servicio Meteorológico Nacional projections align closely, factoring in light northerly winds and partial cloud cover that cap extremes, while historical March 18 averages hover at 27.5°C. Model spread introduces uncertainty—slight dry air advection could push to 29°C, but incoming marine influence favors moderation—keeping odds tight ahead of evening forecast updates.
Experimental AI-generated summary referencing Polymarket data · Updated
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