Forecasts from major numerical weather prediction models indicate a tight range of possible daily maximum temperatures in Toronto on June 30, with ensemble consensus centering on 33–34°C amid variable upper-level ridging and modest surface heating. Recent surface observations and model guidance show limited diurnal spread due to urban heat island effects, light winds, and boundary-layer moisture, which reduce the potential for either significant cooling or rapid warming. High-resolution runs exhibit minor disagreements on timing of peak insolation and cloud cover, keeping 35°C and higher outcomes at lower implied probabilities while historical June climatology supports the current market distribution. Updated model cycles expected overnight will further constrain resolution criteria.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Toronto on June 30?
Highest temperature in Toronto on June 30?
34°C 28%
33°C 26%
35°C 15%
32°C 11%
NEW
NEW
Jun 30, 2026
29°C or below
4%
30°C
3%
31°C
6%
32°C
11%
33°C
26%
34°C
28%
35°C
15%
36°C
5%
37°C
4%
38°C
3%
39°C or higher
1%
34°C 28%
33°C 26%
35°C 15%
32°C 11%
NEW
NEW
Jun 30, 2026
29°C or below
$267 Vol.
4%
30°C
$0 Vol.
3%
31°C
$0 Vol.
6%
32°C
$12 Vol.
11%
33°C
$22 Vol.
26%
34°C
$103 Vol.
28%
35°C
$28 Vol.
15%
36°C
$16 Vol.
5%
37°C
$0 Vol.
4%
38°C
$0 Vol.
3%
39°C or higher
$3,948 Vol.
1%
This market will resolve to the temperature range that contains the highest temperature recorded at the Toronto Pearson Intl Airport Station in degrees Celsius on 30 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, available here: https://www.wunderground.com/history/daily/ca/mississauga/CYYZ.
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.Forecasts from major numerical weather prediction models indicate a tight range of possible daily maximum temperatures in Toronto on June 30, with ensemble consensus centering on 33–34°C amid variable upper-level ridging and modest surface heating. Recent surface observations and model guidance show limited diurnal spread due to urban heat island effects, light winds, and boundary-layer moisture, which reduce the potential for either significant cooling or rapid warming. High-resolution runs exhibit minor disagreements on timing of peak insolation and cloud cover, keeping 35°C and higher outcomes at lower implied probabilities while historical June climatology supports the current market distribution. Updated model cycles expected overnight will further constrain resolution criteria.
This market will resolve to the temperature range that contains the highest temperature recorded at the Toronto Pearson Intl Airport Station in degrees Celsius on 30 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, available here: https://www.wunderground.com/history/daily/ca/mississauga/CYYZ.
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.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, available here: https://www.wunderground.com/history/daily/ca/mississauga/CYYZ.
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, 11:01 PM ET
Volume
$4,389End Date
Jun 30, 2026Market Opened
Jun 28, 2026, 11:01 PM ETResolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded at the Toronto Pearson Intl Airport Station in degrees Celsius on 30 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, available here: https://www.wunderground.com/history/daily/ca/mississauga/CYYZ.
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.Forecasts from major numerical weather prediction models indicate a tight range of possible daily maximum temperatures in Toronto on June 30, with ensemble consensus centering on 33–34°C amid variable upper-level ridging and modest surface heating. Recent surface observations and model guidance show limited diurnal spread due to urban heat island effects, light winds, and boundary-layer moisture, which reduce the potential for either significant cooling or rapid warming. High-resolution runs exhibit minor disagreements on timing of peak insolation and cloud cover, keeping 35°C and higher outcomes at lower implied probabilities while historical June climatology supports the current market distribution. Updated model cycles expected overnight will further constrain resolution criteria.
This market will resolve to the temperature range that contains the highest temperature recorded at the Toronto Pearson Intl Airport Station in degrees Celsius on 30 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, available here: https://www.wunderground.com/history/daily/ca/mississauga/CYYZ.
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.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, available here: https://www.wunderground.com/history/daily/ca/mississauga/CYYZ.
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.
Volume
$4,389End Date
Jun 30, 2026Market Opened
Jun 28, 2026, 11:01 PM ETResolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Forecasts from major numerical weather prediction models indicate a tight range of possible daily maximum temperatures in Toronto on June 30, with ensemble consensus centering on 33–34°C amid variable upper-level ridging and modest surface heating. Recent surface observations and model guidance show limited diurnal spread due to urban heat island effects, light winds, and boundary-layer moisture, which reduce the potential for either significant cooling or rapid warming. High-resolution runs exhibit minor disagreements on timing of peak insolation and cloud cover, keeping 35°C and higher outcomes at lower implied probabilities while historical June climatology supports the current market distribution. Updated model cycles expected overnight will further constrain resolution criteria.
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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