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Highest temperature in Toronto on July 18?

icon for Highest temperature in Toronto on July 18?

Highest temperature in Toronto on July 18?

Jul 17

Jul 18

Jul 17

Jul 18

28°C 35%

29°C 26%

27°C 18%

30°C 15%

Polymarket
NEW

28°C 35%

29°C 26%

27°C 18%

30°C 15%

Polymarket
NEW

24°C or below

$388 Vol.

1%

25°C

$403 Vol.

2%

26°C

$662 Vol.

6%

27°C

$556 Vol.

18%

28°C

$4,528 Vol.

35%

29°C

$737 Vol.

26%

30°C

$1,284 Vol.

15%

31°C

$446 Vol.

3%

32°C

$220 Vol.

1%

33°C

$288 Vol.

<1%

34°C or higher

$417 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 18 Jul '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.Environment Canada’s latest forecast points to a daily maximum near 28°C in Toronto on July 18 amid a 60% chance of showers, placing the outcome squarely in the market’s tight 27–29°C cluster that holds over 66% combined probability. Regional model consensus shows modest daytime heating under partly cloudy skies, with any showers arriving after peak insolation and limiting further warming; this aligns with July climatology of 26–27°C highs while accounting for the slight positive anomaly currently observed. Key variables that could shift the exact peak by 1–2°C include the timing and coverage of cloud breaks versus convective activity, boundary-layer mixing, and local urban heat-island effects measured at Pearson Airport. Updated model runs and official briefings through the evening of July 17 will refine these details ahead of market resolution on the observed daily maximum.

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 18 Jul '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.
Volume
$9,928
End Date
Jul 18, 2026
Market Opened
Jul 16, 2026, 9:02 PM ET

Resolution Source

https://www.wunderground.com/history/daily/ca/mississauga/CYYZ

Resolver

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 18 Jul '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.
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 18 Jul '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.Environment Canada’s latest forecast points to a daily maximum near 28°C in Toronto on July 18 amid a 60% chance of showers, placing the outcome squarely in the market’s tight 27–29°C cluster that holds over 66% combined probability. Regional model consensus shows modest daytime heating under partly cloudy skies, with any showers arriving after peak insolation and limiting further warming; this aligns with July climatology of 26–27°C highs while accounting for the slight positive anomaly currently observed. Key variables that could shift the exact peak by 1–2°C include the timing and coverage of cloud breaks versus convective activity, boundary-layer mixing, and local urban heat-island effects measured at Pearson Airport. Updated model runs and official briefings through the evening of July 17 will refine these details ahead of market resolution on the observed daily maximum.

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 18 Jul '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.
Volume
$9,928
End Date
Jul 18, 2026
Market Opened
Jul 16, 2026, 9:02 PM ET

Resolution Source

https://www.wunderground.com/history/daily/ca/mississauga/CYYZ

Resolver

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 18 Jul '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.

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Frequently Asked Questions

"Highest temperature in Toronto on July 18?" is a prediction market on Polymarket with 11 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "28°C" at 35%, followed by "29°C" at 26%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 35¢ implies that the market collectively assigns a 35% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"Highest temperature in Toronto on July 18?" is a newly created market on Polymarket, launched on Jul 16, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "Highest temperature in Toronto on July 18?," browse the 11 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Highest temperature in Toronto on July 18?" is "28°C" at 35%, meaning the market assigns a 35% chance to that outcome. The next closest outcome is "29°C" at 26%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Highest temperature in Toronto on July 18?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.