Toronto Pearson (CYYZ) Temperature Market Guide

CYYZ • Toronto Pearson International Airport

Polymarket

Toronto Pearson International Airport (CYYZ) offers a Polymarket temperature market in Canada's largest city. Located near Lake Ontario, Toronto experiences significant Great Lakes moderation.

Quick Facts

Station Code	`CYYZ`
Location	Toronto, ON
Coordinates	43.6777°N, 79.6248°W
Elevation	569 ft (173 m)
Timezone	ET (America/Toronto)
NWS Office	ECCC
Resolution Source	NWS CLI Report ↗

About the CYYZ Weather Station

The CYYZ weather station is located at Toronto Pearson International Airport in Mississauga, approximately 17 miles northwest of downtown Toronto. At 569 feet elevation, Pearson sits inland from Lake Ontario.

Toronto Climate & Temperature Patterns

Toronto experiences a humid continental climate (Koppen: Dfb) with four distinct seasons.

Key Climate Factors:

Lake Ontario Influence: The Great Lake moderates temperatures but Pearson is far enough inland that this effect is reduced.

Continental Exposure: Toronto is exposed to arctic air from the north.

Lake Effect: Lake effect clouds and snow can affect the area.

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Seasonal Trading Considerations

Winter (December - February):
Cold with average highs in the low-30s°F. Arctic outbreaks can bring temperatures well below zero.

Spring (March - May):
Slow warming with Lake Ontario keeping temperatures suppressed.

Summer (June - August):
Warm with average highs in the upper 70s to low 80s°F. Heat waves can reach the 90s°F.

Fall (September - November):
Pleasant early fall with gradual cooling.

Toronto-Specific Trading Tips

Pearson vs. Downtown: Pearson often records more extreme temperatures than downtown due to its inland position.

Lake Effect: Watch for lake effect clouds and precipitation.

Arctic Outbreaks: Track Canadian weather patterns for arctic air.

Celsius Reporting: Canadian data is in Celsius.

Market Resolution Details

Toronto temperature markets on Polymarket resolve based on Environment and Climate Change Canada data.

Resolution Source: Environment and Climate Change Canada

Temperature Scale: Canadian data is reported in Celsius.

Data Release Schedule

Typical release times for key data products at CYYZ. Times shown in UTC.

Data Type	Typical Time (UTC)	Variability
METAR Hourly observations	Hourly at :53	±1 min

6-Hour High/Low Reports

These METARs include 6-hour maximum and minimum temperatures, useful for tracking intraday temperature trends.

00:53 UTC

06:53 UTC

12:53 UTC

18:53 UTC

Note: Times are approximate and may vary. CLI reports are the official resolution source for temperature markets. See NWS Data Guide for more information.

Forecasting Challenges

Lake Moderation: Lake Ontario's varying influence creates microclimate effects.

Arctic Air Timing: Precise timing of arctic air masses is challenging.

Historical Temperature Records

Record High: 105°F (40.6°C) recorded in July 1936.

Record Low: -27°F (-32.8°C) recorded in January 1981.

90°F+ Days: Toronto averages about 10-15 days per year at or above 90°F.

📡 Official Data Sources

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