Trader consensus favors 20°C as Wellington's highest temperature on March 17 at 48.5% implied probability, driven by MetService's latest forecast predicting a daytime high of exactly 20°C under a stable high-pressure ridge suppressing extremes. Supporting this, seasonal climatology shows March highs averaging 19.8°C from NIWA records, with recent observations indicating mild southerlies moderating warmth after a cooler spell earlier this week. The 21°C option (27%) reflects slight upside risk from potential northerly gusts in ECMWF ensemble models, while 19°C (19%) accounts for downside from coastal fog persistence. Updated GFS runs released yesterday reinforce this tight clustering around 20°C, narrowing uncertainty ahead of the date.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Wellington on March 17?
Highest temperature in Wellington on March 17?
21°C 100.0%
13°C or below <1%
14°C <1%
15°C <1%
$48,027 Vol.
$48,027 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%
$48,027 Vol.
$48,027 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 13, 2026, 3:41 PM ET
Resolution Source
https://www.wunderground.com/history/daily/nz/wellington/NZWNResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Resolution Source
https://www.wunderground.com/history/daily/nz/wellington/NZWNResolver
0x69c47De9D...Trader consensus favors 20°C as Wellington's highest temperature on March 17 at 48.5% implied probability, driven by MetService's latest forecast predicting a daytime high of exactly 20°C under a stable high-pressure ridge suppressing extremes. Supporting this, seasonal climatology shows March highs averaging 19.8°C from NIWA records, with recent observations indicating mild southerlies moderating warmth after a cooler spell earlier this week. The 21°C option (27%) reflects slight upside risk from potential northerly gusts in ECMWF ensemble models, while 19°C (19%) accounts for downside from coastal fog persistence. Updated GFS runs released yesterday reinforce this tight clustering around 20°C, narrowing uncertainty ahead of the date.
Experimental AI-generated summary referencing Polymarket data · Updated
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