Trader consensus on Polymarket reflects tight clustering around 48-53°F for Chicago O'Hare's highest temperature on April 19, driven by the National Weather Service's latest forecast of a high near 51°F under partly cloudy skies with northwest winds at 10-15 mph gusting higher. This follows a sharp cooling trend after mid-April warmth exceeding 80°F, as persistent post-frontal northwest flow ushers cooler Canadian air, keeping readings 9-12°F below the 60.4°F climatological normal. GFS and ECMWF ensemble guidance shows minor 2-4°F spreads, with 50-51°F edging ahead due to mostly sunny morning conditions aiding insolation before a 30% chance of afternoon showers potentially capping peaks. Key differentiators include cloud cover timing and exact wind shear, with final NWS updates expected later today resolving lingering uncertainty.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Chicago on April 19?
Highest temperature in Chicago on April 19?
50-51°F 39%
48-49°F 34%
52-53°F 13%
46-47°F 11.6%
NEW
$23,877 Vol.
NEW
$23,877 Vol.
Apr 19, 2026
43°F or below
2%
44-45°F
2%
46-47°F
12%
48-49°F
34%
50-51°F
39%
52-53°F
13%
54-55°F
4%
56-57°F
1%
58-59°F
1%
60-61°F
<1%
62°F or higher
<1%
50-51°F 39%
48-49°F 34%
52-53°F 13%
46-47°F 11.6%
NEW
$23,877 Vol.
NEW
$23,877 Vol.
Apr 19, 2026
43°F or below
$4,301 Vol.
2%
44-45°F
$2,710 Vol.
2%
46-47°F
$3,078 Vol.
12%
48-49°F
$1,410 Vol.
34%
50-51°F
$1,448 Vol.
39%
52-53°F
$944 Vol.
13%
54-55°F
$1,314 Vol.
4%
56-57°F
$2,754 Vol.
1%
58-59°F
$1,283 Vol.
1%
60-61°F
$2,049 Vol.
<1%
62°F or higher
$3,163 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 19 Apr '26.
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 Chicago O'Hare Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
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 Fahrenheit (eg, 21°F). 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.Trader consensus on Polymarket reflects tight clustering around 48-53°F for Chicago O'Hare's highest temperature on April 19, driven by the National Weather Service's latest forecast of a high near 51°F under partly cloudy skies with northwest winds at 10-15 mph gusting higher. This follows a sharp cooling trend after mid-April warmth exceeding 80°F, as persistent post-frontal northwest flow ushers cooler Canadian air, keeping readings 9-12°F below the 60.4°F climatological normal. GFS and ECMWF ensemble guidance shows minor 2-4°F spreads, with 50-51°F edging ahead due to mostly sunny morning conditions aiding insolation before a 30% chance of afternoon showers potentially capping peaks. Key differentiators include cloud cover timing and exact wind shear, with final NWS updates expected later today resolving lingering uncertainty.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 19 Apr '26.
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 Chicago O'Hare Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
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 Fahrenheit (eg, 21°F). 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.
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 Chicago O'Hare Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
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 Fahrenheit (eg, 21°F). 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 17, 2026, 12:05 AM ET
Volume
$23,877End Date
Apr 19, 2026Market Opened
Apr 17, 2026, 12:05 AM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 19 Apr '26.
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 Chicago O'Hare Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
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 Fahrenheit (eg, 21°F). 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.Trader consensus on Polymarket reflects tight clustering around 48-53°F for Chicago O'Hare's highest temperature on April 19, driven by the National Weather Service's latest forecast of a high near 51°F under partly cloudy skies with northwest winds at 10-15 mph gusting higher. This follows a sharp cooling trend after mid-April warmth exceeding 80°F, as persistent post-frontal northwest flow ushers cooler Canadian air, keeping readings 9-12°F below the 60.4°F climatological normal. GFS and ECMWF ensemble guidance shows minor 2-4°F spreads, with 50-51°F edging ahead due to mostly sunny morning conditions aiding insolation before a 30% chance of afternoon showers potentially capping peaks. Key differentiators include cloud cover timing and exact wind shear, with final NWS updates expected later today resolving lingering uncertainty.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 19 Apr '26.
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 Chicago O'Hare Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
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 Fahrenheit (eg, 21°F). 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.
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 Chicago O'Hare Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
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 Fahrenheit (eg, 21°F). 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.
Volume
$23,877End Date
Apr 19, 2026Market Opened
Apr 17, 2026, 12:05 AM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Trader consensus on Polymarket reflects tight clustering around 48-53°F for Chicago O'Hare's highest temperature on April 19, driven by the National Weather Service's latest forecast of a high near 51°F under partly cloudy skies with northwest winds at 10-15 mph gusting higher. This follows a sharp cooling trend after mid-April warmth exceeding 80°F, as persistent post-frontal northwest flow ushers cooler Canadian air, keeping readings 9-12°F below the 60.4°F climatological normal. GFS and ECMWF ensemble guidance shows minor 2-4°F spreads, with 50-51°F edging ahead due to mostly sunny morning conditions aiding insolation before a 30% chance of afternoon showers potentially capping peaks. Key differentiators include cloud cover timing and exact wind shear, with final NWS updates expected later today resolving lingering uncertainty.
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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