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Observed at: Toronto Buttonville Municipal Airport
Date: Tuesday April 20, 2021 at 05:00 EDT
Temp.: 3.8 °C
Wind: W 22 gust 34 km/h
Humidity: 82 %
Dew point: 1.0 °C
Pressure: 101.0 kPa
Tendency:
Sunrise: 06:26
Sunset: 20:06
Normals:
Max 13°C Min 3°C
Yesterday
  Max: °C
  Min: °C
  Rainfall: mm
 Extended Forecast - Environment Canada
Tuesday
Mainly cloudy
Mainly cloudy
Max: 6°C
 Wednesday
Snow
Snow
Max: 0°C
 Thursday
A mix of sun and cloud
A mix of sun and cloud
Max: 8°C
 Friday
Sunny
Sunny
Max: 14°C
 Saturday
Chance of showers (60%)
Chance of showers
Max: 11°C
 Sunday
Periods of rain
Periods of rain
Max: 10°C
 Monday
A mix of sun and cloud
A mix of sun and cloud
Max: 12°C
Tuesday night
Snow at times heavy
Snow at times heavy
Min: 0°C
 Wednesday night
Chance of flurries (30%)
Chance of flurries
Min: -2°C
 Thursday night
Cloudy periods
Cloudy periods
Min: 1°C
 Friday night
Cloudy periods
Cloudy periods
Min: 4°C
 Saturday night
Periods of rain
Periods of rain
Min: 5°C
 Sunday night
Cloudy periods
Cloudy periods
Min: 3°C
  

Forecast

Markham, ON (Issued: Tuesday April 20, 2021 at 05:00 EDT)

Today
A mix of sun and cloud. Becoming cloudy this morning. Wind becoming west 30 km/h gusting to 50 this morning. High 6. UV index 4 or moderate.
Tonight
Cloudy. Snow at times heavy beginning after midnight. Amount 5 cm. Wind west 20 km/h becoming light early this evening. Low zero.
Wednesday
Snow ending in the afternoon then a mix of sun and cloud. Amount 2 to 4 cm. Wind northwest 20 km/h gusting to 40. Temperature steady near zero. Wind chill minus 7 in the afternoon. UV index 5 or moderate.
Wednesday night
Cloudy periods with 30 percent chance of flurries. Low minus 2.
Thursday
A mix of sun and cloud. High 8.
Thursday night
Cloudy periods. Low plus 1.
Friday
Sunny. High 14.
Friday night
Cloudy periods. Low plus 4.
Saturday
Cloudy with 60 percent chance of showers. High 11.
Saturday night
Periods of rain. Low plus 5.
Sunday
Periods of rain. High 10.
Sunday night
Cloudy periods. Low plus 3.
Monday
A mix of sun and cloud. High 12.
Averages and extremes
Highest temperature(1987-2015)25.8 °C1987
Lowest temperature(1987-2015)-4.9 °C1988
Average highn/a 
Average lown/a 
Averagen/a 
Greatest rainfall(1987-2015)36.6 mm2000
Greatest snowfall(1987-2015)1.2 cm2013
Greatest precipitation(1987-2015)36.6 mm2000
Most snow on the ground(1987-2015)0.0 cm1987
Monthly frequency of precipitation41.0 % 

24 Hour Forecast - Markham, ON

Date/Time
(EDT)		 Temp.
(°C)
Weather Conditions
LOP †		 Wind
(km/h)
20 April 2021
06:00 3 A mix of sun and cloud (20%)  A mix of sun and cloud Low W 10
07:00 2 A mix of sun and cloud (10%)  A mix of sun and cloud Low W 10
08:00 3 A mix of sun and cloud (10%)  A mix of sun and cloud Low W 10
09:00 4 Mainly cloudy (10%)  Mainly cloudy Low W 30 gust 50
10:00 5 Mainly cloudy (10%)  Mainly cloudy Low W 30 gust 50
11:00 5 Cloudy (10%)  Cloudy Low W 30 gust 50
12:00 5 Cloudy (10%)  Cloudy Low W 20 gust 40
13:00 6 Cloudy (10%)  Cloudy Low W 20 gust 40
14:00 6 Cloudy (10%)  Cloudy Low W 30
15:00 6 Cloudy (10%)  Cloudy Low W 30
16:00 5 Cloudy (10%)  Cloudy Low W 30
17:00 5 Cloudy (10%)  Cloudy Low W 20
18:00 4 Cloudy (20%)  Cloudy Low W 20
19:00 4 Cloudy (20%)  Cloudy Low NW 15
20:00 3 Cloudy (20%)  Cloudy Low NW 10
21:00 2 Cloudy (20%)  Cloudy Low NW 10
22:00 1 Mainly cloudy (20%)  Mainly cloudy Low NW 15
23:00 0 Mainly cloudy (20%)  Mainly cloudy Low N 10
21 April 2021
00:00 0 Cloudy (20%)  Cloudy Low N 15
01:00 0 Snow (90%)  Snow High N 10
02:00 0 Snow (90%)  Snow High N 10
03:00 0 Snow (90%)  Snow High N 10
04:00 0 Snow at times heavy (90%)  Snow at times heavy High N 10
05:00 0 Snow at times heavy (90%)  Snow at times heavy High N 10
 
† 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