Montreal International (Mirabel) Airport

CYMX / YMX

Montréal, CA

Last Updated
May 15, 09:11Z

Current Weather

Display Units
Recent 53 min ago
09:11Z

☀️ Day
IFR
Flight Rules
11°C
Temperature
Dewpoint: 10°C
3 kt
20°
4 SM
Visibility
900 ft
Ceiling
Above Ground Level
1010 hPa
QNH
Altimeter Setting

Raw METAR

SPECI CYMX 150911Z 02003KT 300V080 4SM -RA BR BKN009 BKN020 OVC040 11/10 A2984 RMK SF6SC1SC1 SLP110

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 270 ft
BKN 900 ft AGL
BKN 2,000 ft AGL
OVC 4,000 ft AGL
☁️
BKN
Broken (5/8-7/8 sky coverage)
900 ft
AGL (Above Ground)
1,170 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
2,000 ft
AGL (Above Ground)
2,270 ft AMSL
☁️
OVC
Overcast (8/8 sky coverage)
4,000 ft
AGL (Above Ground)
4,270 ft AMSL

Weather Briefing

IFR

Montreal International (Mirabel) Airport is currently reporting instrument flight rules (IFR) conditions with overcast skies at 4,000 feet and 4 SM visibility.

Wind Analysis

Winds are from the north-northeast (20°) at 3 knots.

Visibility & Ceiling

Visibility is 4 SM, below VFR minimums in some airspace classifications. Check local requirements before departing VFR. The ceiling is 900 feet AGL (broken). Only precision approaches may be usable depending on minimums.

Temperature & Moisture

Temperature is 11°C (52°F) with a dewpoint of 10°C. The temperature-dewpoint spread is very narrow, indicating saturated or near-saturated air. Fog formation or low cloud development is likely.

Forecast Outlook

The TAF forecast covers the next 24 hours. The forecast shows a transition between VFR and IFR conditions. Pilots should monitor the forecast closely and have an alternate airport plan. Expected weather includes: Light Drizzle, Mist, Light Rain, Light Drizzle, Mist, FCST. Temporary MVFR conditions are forecast between 06:00Z and 12:00Z. There is a 30% probability of LIFR conditions between 06:00Z and 12:00Z. Temporary IFR conditions are forecast with Light Rain, Light Drizzle, Mist between 12:00Z and 16:00Z.

Pilot Recommendations

An instrument rating and IFR flight plan are required. Verify that destination and alternate approach minimums are above current and forecast conditions. The narrow temperature-dewpoint spread creates risk of fog formation, particularly during evening and early morning hours. The forecast indicates conditions may deteriorate. Ensure you have fuel reserves and a viable alternate airport.

This briefing is generated from real-time METAR and TAF data. Always verify with official sources before flight.

QNH
1010 hPa
Sea Level Pressure
For altitude above MSL
QFE
1001 hPa
Field Pressure
Height above aerodrome (270 ft)
Pressure Alt
368 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: -47 ft
ISA Deviation: -3.5°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF CYMX 150540Z 1506/1606 02008KT 4SM -DZ BR BKN006 OVC012 TEMPO 1506/1512 P6SM NSW SCT006 OVC012 PROB30 1506/1512 OVC004 FM151200 04008KT P6SM OVC015 TEMPO 1512/1516 5SM -RA -DZ BR BKN008 OVC015 FM151600 VRB03KT P6SM BKN015 OVC030 BECMG 1518/1520 23007KT FEW015 BKN030 FM152200 23006KT P6SM BKN040 FM160100 24005KT P6SM FEW040 RMK NXT FCST BY 151200Z
Upcoming Changes (Next 12 Hours)
10:04Z BASE
+0h
IFR 20° 8 kt
Visibility: 4SM
Ceiling: 600 ft
Light Drizzle, Mist
12:00Z FM151200
+2h
MVFR 40° 8 kt
Visibility: >6SM
Ceiling: 1,500 ft
12:00Z TEMPO
+2h
IFR
Visibility: 5SM
Ceiling: 800 ft
Light Rain, Light Drizzle, Mist
16:00Z FM151600
+6h
MVFR VRB 3 kt
Visibility: >6SM
Ceiling: 1,500 ft

24-Hour Weather Evolution

Loading weather data...
Data Sources
  • • Current conditions from METAR observations
  • • Historical data from past 24 hours
  • • No forecast or predicted data included
  • • Data updated with each new METAR report
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Note: Future values beyond current TAF validity are estimates based on climatological data and trends. Always verify with current forecasts before flight operations.

Airport Runway Layout

N
YMX
06 ✈️
24
11
29

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 06/24
Active: 06
12,000 ft 200 ft CON 45°
2.3 kt 1.9 kt
40° angle
11/29 8,852 ft 200 ft CON 98°
0.6 kt 2.9 kt
78° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - CYMX

6,774 observations | Sep 2025 - May 2026

Flight Rules Distribution

VFR
66.7%
MVFR
18.5%
IFR
10.3%
LIFR
4.5%

Montreal International (Mirabel) Airport typically experiences VFR conditions 66.7% of the time, though instrument-rated pilots will find IFR weather present approximately 14.8% of observations. Prevailing winds are from the W averaging 5.7 knots. Calm conditions occur 10.3% of the time. Temperature extremes range from -29°C to 27°C, reflecting significant seasonal variation. Low visibility conditions (below 3 SM) occur in 5.1% of weather observations. The best months for VFR flying are May, September, October.

Wind Analysis

Prevailing Direction: W (270°)
Average Speed: 5.7 kt
Maximum Recorded: 19 kt
Calm Winds: 10.3%
Direction Distribution:
N
6.5%
NE
20.4%
E
5.5%
SE
1.9%
S
4.4%
SW
22.9%
W
23.5%
NW
4.8%

Temperature Range

Average: -0.8°C
Range: -29°C to 27°C
-29°C 27°C

Visibility

Average: 22.5 SM
Below 3 SM: 5.1%
Fog Frequency: 2.7%

Best Months for VFR

May September October

Runway Wind Analysis

Runway 06/24
Favorable wind: 100%
Avg crosswind: 2 kt
Runway 11/29
Favorable wind: 100%
Avg crosswind: 4 kt

Statistics computed from 6,774 METAR observations (Sep 2025 - May 2026). Data sourced from official aviation weather services. Updated daily.

Montreal International (Mirabel) Airport - Airport Information

Airport Details

ICAO Code: CYMX
IATA Code: YMX
Type: medium airport
Status: active
Elevation: 270 ft MSL

Location

City: Montréal
Country: CA
Latitude: 45.679501°
Longitude: -74.038696°
Time Zone: Etc/GMT+5

Runway Information

Runway 06/24
Length: 12,000 ft
Width: 200 ft
Surface: CON
ILS: No
Runway 11/29
Length: 8,852 ft
Width: 200 ft
Surface: CON
ILS: No

About Montreal International (Mirabel) Airport

Overview

Montreal International (Mirabel) Airport serves the Greater Montreal region as a strategic medium-sized airport located northwest of Montreal. Situated at 270 feet above mean sea level, the airport provides critical aviation infrastructure for the Quebec area. Its two substantial runways support diverse aviation operations across commercial, cargo, and potential general aviation segments.

Flying Conditions

Pilots can expect predominantly favorable flying conditions, with 64.8% of observations reporting VFR conditions. The airport experiences significant seasonal temperature variation, ranging from -29°C to 27°C, with an average temperature of 0°C. Wind patterns are consistently from the west (270°) at an average of 5.5 knots, with calm conditions occurring 12.1% of the time and maximum gusts reaching 18 knots.

Notable Features

The airport features two concrete runways: a primary 12,000-foot runway (06/24) and a secondary 8,852-foot runway (11/29). Both runways demonstrate excellent wind alignment, with 100% favorable wind coverage. Crosswind conditions are minimal, averaging 1.9 knots on runway 06/24 and 3.9 knots on runway 11/29, which provides flexible operational capabilities for arriving and departing aircraft.

Approach Considerations

Visibility averaging 21.9 statute miles supports reliable approaches, though pilots should be prepared for occasional reduced conditions. September, October, and December offer the most consistent VFR conditions. Low IFR and LIFR conditions occur in 15.5% of observations, primarily during winter months. Pilots should anticipate potential reduced visibility scenarios, with fog present in approximately 3% of observations.

Data Sources & Accuracy: Airport information sourced from OurAirports.com, a collaborative database of worldwide airport data. Weather data from official aviation weather services including NOAA Aviation Weather Center and international METAR/TAF providers. Information is updated regularly but pilots should always verify current conditions and NOTAMs through official channels before flight operations.

Official Data Sources

Weather NOAA Aviation Weather Center • International METAR/TAF Network
Airports OurAirports.com • Public domain airport database
NOTAMs FAA NOTAM System • ICAO NOTAM Distribution
Last updated: Jan 1, 1970 12:00 AM UTC

Disclaimer: Data is provided for informational purposes only. Pilots must verify all information through official sources before flight operations. Weather conditions change rapidly; always obtain a current briefing from approved weather services.