Montreal Temperature Market Guide

CYUL • Montreal-Trudeau International Airport

IBKR

Montreal, Quebec's largest city, presents a humid continental climate with dramatic seasonal contrasts. Located on an island in the St. Lawrence River, the city experiences cold, snowy winters and warm, humid summers.

Quick Facts

Station Code	`CYUL`
Location	Montreal, QC
Coordinates	45.4706°N, 73.7408°W
Elevation	118 ft (36 m)
Timezone	ET (America/Toronto)
NWS Office	Environment Canada

About CYUL Weather Station

Montreal-Trudeau International Airport (CYUL) serves as the primary weather observation station for the Montreal area. Located about 20 kilometers west of downtown Montreal, the airport sits at 118 feet (36 meters) elevation.

Montreal's position in the St. Lawrence Valley exposes it to both Arctic air masses from the north and warm, humid air from the Gulf of Mexico.

Climate Patterns

Montreal has a humid continental climate (Koppen: Dfb) with warm, humid summers and cold, snowy winters. The seasonal temperature range is among the largest for any major North American city.

Summer highs typically reach 26-28°C (79-82°F) with significant humidity. Winters are cold with highs around -5 to -7°C (19-23°F), and temperatures can drop below -25°C during Arctic outbreaks.

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Seasonal Trading Considerations

Winter (December - February): Cold and snowy with highs -7 to -5°C (19-23°F). Arctic outbreaks bring extreme cold below -25°C.

Spring (March - May): Slow warming with lingering cold. Snow possible into April.

Summer (June - August): Warm and humid with highs 25-28°C (77-82°F). Heat waves bring 33°C+.

Autumn (September - November): Cooling rapidly. Beautiful foliage in October.

Trading Tips for Montreal

Montreal's continental climate creates extreme seasonal swings - expect temperatures from -30°C in winter to +35°C in summer.

Arctic outbreaks are the key winter wildcard. Track the polar vortex and Arctic high pressure systems for extreme cold potential.

Summer heat waves occur when the Bermuda High extends northward.

Data Release Schedule

Typical release times for key data products at CYUL. 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

Arctic Outbreak Intensity: The severity of winter cold waves can exceed forecasts when Arctic air is stronger than expected.

Summer Heat Waves: Humidity amplifies heat, and forecasting the magnitude of heat events is challenging.

Valley Channeling: The St. Lawrence Valley can funnel air masses, creating local intensification.