Environment Canada's latest forecast for Toronto on May 1 projects a sunny daytime high of 9°C, with clear nights dropping to -1°C, anchoring trader consensus around cooler outcomes amid a sluggish, below-normal spring 2026 characterized by persistent upper-level troughs and cold air masses. Market-implied odds reflect tight uncertainty, with 10°C (36%) slightly leading 9°C (30.5%) due to ensemble model spreads from the Canadian Meteorological Centre suggesting potential for marginal afternoon peaks from solar heating under cloudless skies and light winds. Differentiating factors include minor variations in peak insolation timing, boundary layer mixing, and measurement at official stations like Toronto Pearson, against historical May 1 averages near 14°C but analogs favoring 8–11°C in similar cool outbreaks. Updated hourly guidance expected overnight could refine these probabilities.
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 May 1?
Highest temperature in Toronto on May 1?
10°C 36%
9°C 31%
11°C 17%
8°C 8%
$19,293 Vol.
$19,293 Vol.
4°C or below
<1%
5°C
<1%
6°C
1%
7°C
2%
8°C
8%
9°C
31%
10°C
36%
11°C
17%
12°C
6%
13°C
2%
14°C or higher
1%
10°C 36%
9°C 31%
11°C 17%
8°C 8%
$19,293 Vol.
$19,293 Vol.
4°C or below
<1%
5°C
<1%
6°C
1%
7°C
2%
8°C
8%
9°C
31%
10°C
36%
11°C
17%
12°C
6%
13°C
2%
14°C or higher
1%
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 Toronto Pearson Intl Airport Station once information is finalized, 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 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: Apr 29, 2026, 12:06 AM ET
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...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 Toronto Pearson Intl Airport Station once information is finalized, 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 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.
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Environment Canada's latest forecast for Toronto on May 1 projects a sunny daytime high of 9°C, with clear nights dropping to -1°C, anchoring trader consensus around cooler outcomes amid a sluggish, below-normal spring 2026 characterized by persistent upper-level troughs and cold air masses. Market-implied odds reflect tight uncertainty, with 10°C (36%) slightly leading 9°C (30.5%) due to ensemble model spreads from the Canadian Meteorological Centre suggesting potential for marginal afternoon peaks from solar heating under cloudless skies and light winds. Differentiating factors include minor variations in peak insolation timing, boundary layer mixing, and measurement at official stations like Toronto Pearson, against historical May 1 averages near 14°C but analogs favoring 8–11°C in similar cool outbreaks. Updated hourly guidance expected overnight could refine these probabilities.
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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