John C. Munro Hamilton International Airport

CYHM / YHM

Hamilton, CA

Last Updated
Jul 4, 11:00Z

Current Weather

Display Units
Fresh 25 min ago
11:00Z

☀️ Day
MVFR
Flight Rules
22°C
Temperature
Dewpoint: 20°C
11 kt
240°
15 SM
Visibility
1,400 ft
Ceiling
Above Ground Level
1016 hPa
QNH
Altimeter Setting

Raw METAR

METAR CYHM 041100Z 24011KT 15SM BKN014 BKN030 BKN240 22/20 A2999 RMK SC5CU1CI1 SLP153 DENSITY ALT 1700FT

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 780 ft
BKN 1,400 ft AGL
BKN 3,000 ft AGL
BKN 24,000 ft AGL
☁️
BKN
Broken (5/8-7/8 sky coverage)
1,400 ft
AGL (Above Ground)
2,180 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
3,000 ft
AGL (Above Ground)
3,780 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
24,000 ft
AGL (Above Ground)
24,780 ft AMSL

Weather Briefing

MVFR

John C. Munro Hamilton International Airport is currently reporting marginal VFR (MVFR) conditions with broken clouds at 1,400 feet and 15 SM visibility.

Wind Analysis

Winds are from the west-southwest (240°) at 11 knots. Runway 24 is favored with a 11-knot headwind and 0-knot crosswind component.

Visibility & Ceiling

Visibility is 15 SM. The ceiling is 1400 feet AGL (broken), placing conditions in the MVFR category.

Temperature & Moisture

Temperature is 22°C (72°F) with a dewpoint of 20°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 23 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: Thunderstorm Rain, Mist, Light Showers Rain, Mist, Heavy Thunderstorm Rain, Mist, Light Showers Rain, Mist, Light Drizzle, Mist, FCST. Winds are forecast to reach up to 25 knots during the period. Expect variable wind speeds ranging from 5 to 25 knots. Temporary MVFR conditions are forecast with Thunderstorm Rain, Mist between 07:00Z and 08:00Z. Temporary MVFR conditions are forecast with Light Showers Rain, Mist between 13:00Z and 19:00Z. There is a 30% probability of IFR conditions with Heavy Thunderstorm Rain, Mist between 13:00Z and 15:00Z.

Pilot Recommendations

VFR pilots should exercise caution. Consider filing IFR if instrument rated, or postponing the flight if conditions are expected to deteriorate further. 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
1016 hPa
Sea Level Pressure
For altitude above MSL
QFE
990 hPa
Field Pressure
Height above aerodrome (780 ft)
Pressure Alt
698 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 1,725 ft
ISA Deviation: +8.6°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF AMD CYHM 040711Z 0407/0506 24005KT P6SM SCT040 BKN060 TEMPO 0407/0408 5SM TSRA BR BKN040 OVC060CB FM040740 24005KT P6SM BKN060 OVC120 FM041300 26008KT P6SM BKN060 OVC180 TEMPO 0413/0419 5SM -SHRA BR BKN040 OVC060 PROB30 0413/0415 VRB25G35KT 1SM +TSRA BR BKN015 OVC060CB FM041900 22008KT P6SM -SHRA SCT020 BKN060 PROB30 0419/0423 VRB20G30KT 2SM TSRA BR BKN020 OVC060CB FM050000 04005KT P6SM BKN015 OVC060 FM050200 04008KT 6SM BR SCT004 BKN010 OVC060 PROB30 0502/0506 2SM -DZ BR OVC004 RMK NXT FCST BY 041200Z
Upcoming Changes (Next 12 Hours)
11:25Z BASE
+0h
VFR 240° 5 kt
Visibility: >6SM
Ceiling: 6,000 ft
13:00Z FM041300
+2h
VFR 260° 8 kt
Visibility: >6SM
Ceiling: 6,000 ft
13:00Z TEMPO
+2h
MVFR
Visibility: 5SM
Ceiling: 4,000 ft
Light Showers Rain, Mist
13:00Z PROB30
+2h
IFR VRB 25 kt
Visibility: 1SM
Ceiling: 1,500 ft
Heavy Thunderstorm Rain, Mist

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
YHM
06
24 ✈️
12
30

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 06/24
Active: 24
6,010 ft 150 ft ASP 49°
11.0 kt 0.0 kt
0° angle
12/30 10,006 ft 200 ft ASP 107°
7.5 kt 8.0 kt
133° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - CYHM

8,533 observations | Sep 2025 - Jul 2026

Flight Rules Distribution

VFR
67.3%
MVFR
20.1%
IFR
7.1%
LIFR
5.5%

John C. Munro Hamilton International Airport typically experiences VFR conditions 67.3% of the time, though instrument-rated pilots will find IFR weather present approximately 12.6% of observations. Prevailing winds are from the SW averaging 9.4 knots, with gusts recorded up to 35 knots. Temperature extremes range from -25°C to 34°C, reflecting significant seasonal variation. The best months for VFR flying are June, October, July.

Wind Analysis

Prevailing Direction: SW (225°)
Average Speed: 9.4 kt
Maximum Recorded: 35 kt
Calm Winds: 1.3%
Direction Distribution:
E
3.4%
N
8.7%
S
14%
W
20.1%
NE
16.7%
NW
6.3%
SE
2.4%
SW
27%

Temperature Range

Average: 4.9°C
Range: -25°C to 34°C
-25°C 34°C

Visibility

Average: 12.3 SM
Below 3 SM: 3.6%
Fog Frequency: 7.6%

Best Months for VFR

June October July

Runway Wind Analysis

Runway 06/24
Favorable wind: 100%
Avg crosswind: 4.3 kt
Runway 12/30
Favorable wind: 100%
Avg crosswind: 7.5 kt

Statistics computed from 8,533 METAR observations (Sep 2025 - Jul 2026). Data sourced from official aviation weather services. Updated daily.

John C. Munro Hamilton International Airport - Airport Information

Airport Details

ICAO Code: CYHM
IATA Code: YHM
Type: medium airport
Status: active
Elevation: 780 ft MSL

Location

City: Hamilton
Country: CA
Latitude: 43.173599°
Longitude: -79.934998°
Time Zone: Etc/GMT+5

Runway Information

Runway 06/24
Length: 6,010 ft
Width: 150 ft
Surface: ASP
ILS: No
Runway 12/30
Length: 10,006 ft
Width: 200 ft
Surface: ASP
ILS: No

About John C. Munro Hamilton International Airport

Overview

John C. Munro Hamilton International Airport serves as a critical medium-sized airport located in Hamilton, Ontario, Canada. Situated at 780 feet above mean sea level with coordinates 43.173599, -79.934998, the airport provides important regional aviation infrastructure with two substantial asphalt runways capable of handling diverse aircraft operations.

Flying Conditions

Weather conditions at CYHM demonstrate significant variability, with visual flight rules (VFR) predominating at 64.5% of observed periods. Pilots should anticipate prevailing southwest winds averaging 9.6 knots, with temperature ranges extending from -17°C to 28°C. Seasonal visibility averages 12.2 statute miles, though periods of reduced visibility occur, with fog present in 5.8% of observations and conditions dropping below 3 statute miles in 3.7% of reports.

Notable Features

The airport features two parallel runways: 06/24 measuring 6,010 feet and 12/30 extending 10,006 feet, both constructed of asphalt surface. Both runways demonstrate 100% favorable wind alignment, with Runway 12/30 experiencing a slightly higher average crosswind of 7.6 knots compared to Runway 06/24's 4-knot average crosswind. September, October, and November consistently provide the most favorable visual flying conditions.

Approach Considerations

Pilots should plan approaches considering the prevailing southwest winds at 225 degrees. With wind speeds typically around 9.6 knots and potential gusts up to 35 knots, careful wind assessment is crucial during arrival and departure. The longer Runway 12/30 offers additional operational flexibility, particularly during variable wind conditions.

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.