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Richmond Hill, ON

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HEAT WARNING

A prolonged heat event will begin on Monday. Dangerously hot and humid conditions are expected through most of the week. Daytime highs on Monday through much of the week are expected to be 30 to 35 degrees Celsius with humidex values of 40 to 45. There will be little relief through the overnight as lows are expected to be 20 to 23 degrees Celsius with humidex values of 26 to 30. Temperatures and humidex values may be several degrees cooler near the shores of the Great Lakes. Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category. Extreme heat can affect everyone's health. 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 are 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:
  • York - Durham
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Current ConditionsObserved at: King City North

15°C

Wind:
N 7 km/h
More details
Temperature:
14.9°C
Pressure:
101.7 kPa
Dew point:
8.1°C
Humidity:
64%
Date:
Observed at:
King City North
Past 24 hour Conditions
Weather Radar
Satellite
Lightning
Alerts
Jet Stream
Hourly Forecast
Historical Weather

ForecastForecast issued:

HEAT WARNING

A prolonged heat event will begin on Monday. Dangerously hot and humid conditions are expected through most of the week. Daytime highs on Monday through much of the week are expected to be 30 to 35 degrees Celsius with humidex values of 40 to 45. There will be little relief through the overnight as lows are expected to be 20 to 23 degrees Celsius with humidex values of 26 to 30. Temperatures and humidex values may be several degrees cooler near the shores of the Great Lakes. Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category. Extreme heat can affect everyone's health. 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 are 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:
  • York - Durham
Follow:

Detailed ForecastForecast issued:

Chance of showers
Tonight
15°C
Partly cloudy. 40 percent chance of showers before morning with risk of a thunderstorm. Low 15.
Chance of showers
Mon, 17 Jun
32°C
A mix of sun and cloud with 40 percent chance of showers and risk of a thunderstorm. Wind becoming southwest 20 km/h gusting to 40 late in the morning. High 32. Humidex 40. UV index 10 or very high.
Night:Partly cloudy. 30 percent chance of showers early in the evening with risk of a thunderstorm. Low 21.
Chance of showers
Tue, 18 Jun
33°C
A mix of sun and cloud with 30 percent chance of showers. High 33.
Night:Clear. Low 22.
Chance of showers
Wed, 19 Jun
31°C
A mix of sun and cloud with 30 percent chance of showers. High 31.
Night:Cloudy periods. Low 21.
Sunny
Thu, 20 Jun
31°C
Sunny. High 31.
Night:Cloudy periods. Low 20.
A mix of sun and cloud
Fri, 21 Jun
31°C
A mix of sun and cloud. High 31.
Night:Cloudy periods. Low 18.
Chance of showers
Sat, 22 Jun
27°C
Cloudy with 30 percent chance of showers. High 27.
Normals:
Max23°C.Min13°C.
Sunrise:
5:35 EDT
Sunset:
21:03 EDT

Averages and extremes

17 Jun
Average high
  • n/a
Average low
  • n/a
Highest temperature (1986-2014)
  • 35.2°C
  • 1994
Lowest temperature (1986-2014)
  • 8.4°C
  • 1999
Greatest precipitation (1986-2014)
  • 28.8 mm
  • 2014
Greatest rainfall (1986-2014)
  • 28.8 mm
  • 2014
Greatest snowfall (1986-2014)
  • 0.0 cm
Most snow on the ground (1986-2014)
  • 0.0 cm
Monthly frequency of precipitation
  • 39%

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:
21.8°C
Min:
8.9°C

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