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Hamilton, ON

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HEAT WARNING

A prolonged heat event continues today. Hot and humid conditions are expected. Lows are expected to be 19 to 21 degrees Celsius with little relief through the overnight. Temperatures and humidex values may be several degrees cooler near the shores of the Great Lakes. Less hot and humid conditions are expected to slowly move into the area this weekend. Daytime highs are expected to be in the 28 to 31 degree Celsius range with overnight lows of 18 to 21 degrees Celsius. There is some uncertainty regarding how quick this cooler and drier airmass will move in so heat warnings may persist for some areas through the weekend. Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category. Drink plenty of water regularly, even before you feel thirsty to decrease your risk of dehydration. Thirst is not a good indicator of dehydration. The health risks are greater for older adults, infants and young children, pregnant people, people with physical and/or mental illnesses, and people with disabilities or mobility issues. Never leave people, particularly children, or pets inside a parked vehicle. Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions. Heat stroke is a medical emergency! Call 911 or your local emergency number immediately if you or someone you are caring for has a high body temperature and is confused, has stopped sweating or becomes unconscious. While waiting for help, cool the person right away: move them to a cool place, apply cold water to large areas of the skin and fan the person as much as possible. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or tweet reports using #ONStorm.

In effect for:
  • City of Hamilton
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Current ConditionsObserved at: Hamilton Munro Int'l Airport

Mostly Cloudy

Mostly Cloudy

23°C

Wind:
NNE 22
gusts 32 km/h
Humidex:
31
More details
Temperature:
22.7°C
Pressure:
102.1 kPa
Dew point:
20.8°C
Visibility:
19 km
Humidity:
89%
Date:
Observed at:
Hamilton Munro Int'l Airport
Past 24 hour Conditions
Weather Radar
Satellite
Lightning
Alerts
Jet Stream
Hourly Forecast
Air Quality
Historical Weather

ForecastForecast issued:

HEAT WARNING

A prolonged heat event continues today. Hot and humid conditions are expected. Lows are expected to be 19 to 21 degrees Celsius with little relief through the overnight. Temperatures and humidex values may be several degrees cooler near the shores of the Great Lakes. Less hot and humid conditions are expected to slowly move into the area this weekend. Daytime highs are expected to be in the 28 to 31 degree Celsius range with overnight lows of 18 to 21 degrees Celsius. There is some uncertainty regarding how quick this cooler and drier airmass will move in so heat warnings may persist for some areas through the weekend. Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category. Drink plenty of water regularly, even before you feel thirsty to decrease your risk of dehydration. Thirst is not a good indicator of dehydration. The health risks are greater for older adults, infants and young children, pregnant people, people with physical and/or mental illnesses, and people with disabilities or mobility issues. Never leave people, particularly children, or pets inside a parked vehicle. Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions. Heat stroke is a medical emergency! Call 911 or your local emergency number immediately if you or someone you are caring for has a high body temperature and is confused, has stopped sweating or becomes unconscious. While waiting for help, cool the person right away: move them to a cool place, apply cold water to large areas of the skin and fan the person as much as possible. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or tweet reports using #ONStorm.

In effect for:
  • City of Hamilton
Follow:

Detailed ForecastForecast issued:

Chance of showers
Tonight
20°C
Mainly cloudy. 60 percent chance of showers early this evening with risk of a thunderstorm. Low 20.
Chance of showers
Sat, 22 Jun
30°C
A mix of sun and cloud. 60 percent chance of showers in the afternoon with risk of a thunderstorm. Wind becoming southwest 20 km/h in the afternoon. High 30. Humidex 40. UV index 10 or very high.
Night:Cloudy with 60 percent chance of showers. Risk of a thunderstorm in the evening. Wind southwest 20 km/h becoming light in the evening. Low 20.
Chance of showers
Sun, 23 Jun
28°C
Cloudy with 30 percent chance of showers. High 28.
Night:Cloudy with 30 percent chance of showers. Low 16.
Chance of showers
Mon, 24 Jun
24°C
A mix of sun and cloud with 30 percent chance of showers. High 24.
Night:Clear. Low 16.
A mix of sun and cloud
Tue, 25 Jun
28°C
A mix of sun and cloud. High 28.
Night:Cloudy. Low 20.
Chance of showers
Wed, 26 Jun
23°C
Cloudy with 40 percent chance of showers. High 23.
Night:Cloudy periods with 40 percent chance of showers. Low 15.
A mix of sun and cloud
Thu, 27 Jun
22°C
A mix of sun and cloud. High 22.
Normals:
Max25°C.Min14°C.
Sunrise:
5:40 EDT
Sunset:
21:03 EDT

Averages and extremes

21 Jun
Average high
  • 24.4°C
Average low
  • 13.2°C
Highest temperature (1960-2011)
  • 31.5°C
  • 1998
Lowest temperature (1960-2011)
  • 2.8°C
  • 1969
Greatest precipitation (1960-2011)
  • 37.0 mm
  • 1993
Greatest rainfall (1960-2011)
  • 37.0 mm
  • 1993
Greatest snowfall (1960-2011)
  • 0.0 cm
Most snow on the ground (1970-2011)
  • 0.0 cm
Monthly frequency of precipitation
  • 37%

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

Yesterday's Data

Max:
30.8°C
Min:
20.4°C
Rainfall:
7.8 mm

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