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| Extended Forecast - Environment Canada | ||||||
Thursday
 A few showers Max: 22°C |
Friday
 Chance of showers Max: 23°C |
Saturday
 Chance of showers Max: 23°C |
Sunday
 Chance of showers Max: 19°C |
Monday
Chance of showers Max: 18°C |
Tuesday
Chance of showers Max: 20°C |
Wednesday
 A mix of sun and cloud Max: 21°C |
Tonight
 Showers Min: 19°C |
Friday Night
 Cloudy periods Min: 13°C |
Saturday Night
 Chance of showers Min: 13°C |
Sunday Night
 Chance of showers Min: 13°C |
Monday Night
Chance of showers Min: 10°C |
Tuesday Night
Chance of showers Min: 12°C |
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Forecast
Markham, ON (Issued: 8:58 AM EDT Thursday 22 June 2017)
- Thursday
- Increasing cloudiness. A few showers beginning late this morning. Risk of a thunderstorm this afternoon. Wind becoming southwest 20 km/h gusting to 40 this afternoon. High 22. Humidex 28. UV index 4 or moderate.
- Thursday night
- Showers with risk of a thunderstorm. Wind southwest 20 km/h gusting to 40 becoming light after midnight. Low 19.
- Friday
- Showers ending in the morning then cloudy with 60 percent chance of showers. Risk of a thunderstorm in the morning and afternoon. Wind becoming southwest 30 km/h gusting to 50 late in the morning. High 23. Humidex 31.
- Friday night
- Cloudy periods. Low 13.
- Saturday
- A mix of sun and cloud with 30 percent chance of showers. High 23.
- Saturday night
- Cloudy periods with 30 percent chance of showers. Low 13.
- Sunday
- A mix of sun and cloud with 40 percent chance of showers. High 19.
- Sunday night
- Cloudy periods with 40 percent chance of showers. Low 13.
- Monday
- A mix of sun and cloud with 30 percent chance of showers. High 18.
- Monday night
- Cloudy periods with 30 percent chance of showers. Low 10.
- Tuesday
- A mix of sun and cloud with 30 percent chance of showers. High 20.
- Tuesday night
- Cloudy periods with 30 percent chance of showers. Low 12.
- Wednesday
- A mix of sun and cloud. High 21.