Markham Weather Today — Ontario, Canada
Current temperature, rain chance, humidity, wind and air quality in Markham, plus an hourly and 3-day forecast. Updated through the day.
20:35
Fri, 18 Sep 2026
📍 Ontario, Canada
Markham??
18
°C
Overcast
Feels 13°C · 64°F
💧 40% Humidity
💨 ↑ 15.8 km/h NNW
👁 10 km Visibility
🌧 0 mm Precip
☁ 100% Cloud
☀️ UV Low
🌿 AQI Good
☀️ UV Index
0
Low
🔵 Pressure
1023
hPa · 30.22 in
💨 Wind
15.8
km/h · Gust 27.7 km/h
↑ NNW
💧 Humidity
40%
Dew point 3.8°C
👁 Visibility
10
km · 6 miles
🌡 Heat Index
17.5°
Wind chill 17.5°C
🌿 Air Quality
Good
US EPA Index: 1
🌅
Sunrise
06:59 AM
🌇
Sunset
07:22 PM
📅 3-Day Forecast
Friday
18 Sep 2026
Overcast
22°
/
15°
💧51%
🌧0mm
💨17
☀️UV 5.4
Saturday
19 Sep 2026
Overcast
15°
/
11°
💧53%
🌧0mm
💨18
☀️UV 5.6
Sunday
20 Sep 2026
Overcast
20°
/
13°
💧55%
🌧0.27mm
💨19
☀️UV 2.9
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