Current forecast guidance from agencies including MetService and NIWA points to a maximum of 11–12°C in Wellington on June 30, aligning with the market’s leading probabilities for those exact outcomes. Late June climatology shows typical daily highs near 12°C under near-average seasonal conditions, with no strong signals for significant deviation from the NIWA outlook. Short-range model runs emphasize southerly flows and possible cloud cover that cap daytime warming, while light winds and clearer intervals could allow brief rises toward 13°C. Traders appear to be weighting the most recent deterministic forecasts and historical analogs over longer-term variability, with resolution hinging on the official highest reading from the Kelburn station. Updated model runs in the next 48 hours will likely refine these implied odds.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Wellington on June 30?
12°C 100.0%
6°C or below <1%
7°C <1%
8°C <1%
$278,607 Vol.
$278,607 Vol.
6°C or below
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C
No
12°C
Yes
13°C
No
14°C
No
15°C
No
16°C or higher
No
12°C 100.0%
6°C or below <1%
7°C <1%
8°C <1%
$278,607 Vol.
$278,607 Vol.
6°C or below
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C
No
12°C
Yes
13°C
No
14°C
No
15°C
No
16°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 for the Wellington Intl Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Jun 28, 2026, 12:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/nz/wellington/NZWNResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Wellington Intl Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Resolution Source
https://www.wunderground.com/history/daily/nz/wellington/NZWNResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Current forecast guidance from agencies including MetService and NIWA points to a maximum of 11–12°C in Wellington on June 30, aligning with the market’s leading probabilities for those exact outcomes. Late June climatology shows typical daily highs near 12°C under near-average seasonal conditions, with no strong signals for significant deviation from the NIWA outlook. Short-range model runs emphasize southerly flows and possible cloud cover that cap daytime warming, while light winds and clearer intervals could allow brief rises toward 13°C. Traders appear to be weighting the most recent deterministic forecasts and historical analogs over longer-term variability, with resolution hinging on the official highest reading from the Kelburn station. Updated model runs in the next 48 hours will likely refine these implied odds.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

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