Trader consensus overwhelmingly favors 21°C as Wellington's highest temperature on March 18, driven by MetService New Zealand's official forecast projecting a daytime maximum of exactly 21°C under partly cloudy skies with light southerly winds, corroborated by converging ensemble predictions from ECMWF and GFS models showing minimal divergence. Historical March data for Wellington supports this, with average highs around 20-21°C and rare exceedances above 23°C absent föhn-like northerlies. Realistic challenges include an unforeseen influx of warm northwesterly air or prolonged clear skies accelerating solar heating, though current upper-air patterns and sea surface temperatures indicate low likelihood, keeping market-implied odds firmly anchored.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Wellington on March 18?
Highest temperature in Wellington on March 18?
21°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$136,949 Vol.
$136,949 Vol.
13°C or below
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
No
21°C
Yes
22°C
No
23°C or higher
No
21°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$136,949 Vol.
$136,949 Vol.
13°C or below
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
No
21°C
Yes
22°C
No
23°C or higher
No
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 Wellington Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/nz/wellington/NZWN.
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, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/nz/wellington/NZWNResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/nz/wellington/NZWNResolver
0x69c47De9D...Trader consensus overwhelmingly favors 21°C as Wellington's highest temperature on March 18, driven by MetService New Zealand's official forecast projecting a daytime maximum of exactly 21°C under partly cloudy skies with light southerly winds, corroborated by converging ensemble predictions from ECMWF and GFS models showing minimal divergence. Historical March data for Wellington supports this, with average highs around 20-21°C and rare exceedances above 23°C absent föhn-like northerlies. Realistic challenges include an unforeseen influx of warm northwesterly air or prolonged clear skies accelerating solar heating, though current upper-air patterns and sea surface temperatures indicate low likelihood, keeping market-implied odds firmly anchored.
Experimental AI-generated summary referencing Polymarket data · Updated
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