HEAT WARNING

Observed at: Toronto Buttonville Municipal Airport
Date: Sunday July 15, 2018 at 18:00 EDT
Mainly Sunny
Mainly Sunny
Temp.: 30.7 °C
Humidex: 37
Wind: ESE 14 km/h
Humidity: 47 %
Dew point: 18.4 °C
Pressure: 101.4 kPa
Tendency: falling
Visibility: 24.1 km
Sunrise: 05:48
Sunset: 20:58
Normals:
Max 26°C Min 15°C
Yesterday
  Max: 27.6 °C
  Min: 20.2 °C
  Rainfall: Trace mm

 Extended Forecast - Environment Canada
  Monday
Chance of showers (60%)
Chance of showers
Max: 31°C
Tuesday
A mix of sun and cloud
A mix of sun and cloud
Max: 25°C
Wednesday
Sunny
Sunny
Max: 24°C
Thursday
Sunny
Sunny
Max: 26°C
Friday
A mix of sun and cloud
A mix of sun and cloud
Max: 25°C
Saturday
Chance of showers (30%)
Chance of showers
Max: 23°C
Sunday night
Chance of showers (30%)
Chance of showers
Min: 20°C
Monday night
Chance of showers (60%)
Chance of showers
Min: 20°C
Tuesday night
Clear
Clear
Min: 13°C
Wednesday night
Clear
Clear
Min: 13°C
Thursday night
Cloudy periods
Cloudy periods
Min: 16°C
Friday night
Cloudy periods
Cloudy periods
Min: 19°C

Forecast

Markham, ON (Issued: Sunday July 15, 2018 at 15:30 EDT)

Tonight
Partly cloudy. 30 percent chance of showers early this evening with risk of a thunderstorm. Low 20.
Monday
Mainly sunny. Increasing cloudiness late in the morning then 60 percent chance of showers in the afternoon. Risk of a thunderstorm in the afternoon. Wind becoming southwest 20 km/h near noon. High 31. Humidex 39. UV index 8 or very high.
Monday night
Mainly cloudy with 60 percent chance of showers and risk of a thunderstorm. Clearing before morning. Wind southwest 20 km/h becoming light in the evening. Low 20.
Tuesday
A mix of sun and cloud. High 25.
Tuesday night
Clear. Low 13.
Wednesday
Sunny. High 24.
Wednesday night
Clear. Low 13.
Thursday
Sunny. High 26.
Thursday night
Cloudy periods. Low 16.
Friday
A mix of sun and cloud. High 25.
Friday night
Cloudy periods. Low 19.
Saturday
A mix of sun and cloud with 30 percent chance of showers. High 23.
Averages and extremes
Highest temperature(1986-2014)33.4 °C1998
Lowest temperature(1986-2014)8.6 °C2009
Average highn/a 
Average lown/a 
Averagen/a 
Greatest rainfall(1986-2014)28.6 mm1996
Greatest snowfall(1986-2014)0.0 cm1986
Greatest precipitation(1986-2014)28.6 mm1996
Most snow on the ground(1986-2014)0.0 cm1986
Monthly frequency of precipitation36.0 % 

24 Hour Forecast - Markham, ON

Date/Time
(EDT)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)

Humidex
15 July 2018
19:00 28 Chance of showers. Risk of thunderstorms (30%)  Chance of showers. Risk of thunderstorms Low S 15 35
20:00 26 Mainly sunny (20%)  Mainly sunny Low VR 5 34
21:00 25 A few clouds (20%)  A few clouds Low VR 5 32
22:00 23 A few clouds (20%)  A few clouds Low VR 5 30
23:00 22 A few clouds (20%)  A few clouds Low VR 5 28
16 July 2018
00:00 21 A few clouds (20%)  A few clouds Low VR 5 27
01:00 21 A few clouds (20%)  A few clouds Low VR 5 26
02:00 20 A few clouds (20%)  A few clouds Low VR 5 25
03:00 20 A few clouds (20%)  A few clouds Low VR 5 25
04:00 20 A few clouds (20%)  A few clouds Low VR 5 25
05:00 20 A few clouds (20%)  A few clouds Low VR 5 25
06:00 21 Mainly sunny (20%)  Mainly sunny Low VR 5 27
07:00 23 Mainly sunny (20%)  Mainly sunny Low VR 5 29
08:00 24 Mainly sunny (20%)  Mainly sunny Low S 15 31
09:00 25 Mainly sunny (20%)  Mainly sunny Low S 15 32
10:00 27 A mix of sun and cloud (20%)  A mix of sun and cloud Low S 15 34
11:00 28 A mix of sun and cloud (20%)  A mix of sun and cloud Low S 15 35
12:00 29 Mainly cloudy (20%)  Mainly cloudy Low SW 20 37
13:00 30 Chance of showers. Risk of thunderstorms (60%)  Chance of showers. Risk of thunderstorms Medium SW 20 38
14:00 31 Chance of showers. Risk of thunderstorms (60%)  Chance of showers. Risk of thunderstorms Medium SW 20 39
15:00 30 Chance of showers. Risk of thunderstorms (60%)  Chance of showers. Risk of thunderstorms Medium SW 20 38
16:00 29 Chance of showers. Risk of thunderstorms (60%)  Chance of showers. Risk of thunderstorms Medium SW 20 38
17:00 28 Chance of showers. Risk of thunderstorms (60%)  Chance of showers. Risk of thunderstorms Medium SW 20 37
18:00 27 Chance of showers. Risk of thunderstorms (60%)  Chance of showers. Risk of thunderstorms Medium SW 20 36
 
† Likelihood of Precipitation (LOP) as described in the public forecast as a chance of measurable precipitation for a period of time.
  Nil: 0%
  Low: 40% or below
  Medium: 60% or 70%
  High: Above 70%

Environment Canada