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WeatherLive › Ontario › Markham

Markham, ON Weather

Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherMarkham · 9:29 AM EDT
26° | 12°
19°C
Feels like 17°
Sunny
-4° vs. normal — cooler than usual for this time of year
WindNE 5 mph · Gusts 9 mph
Precip5% · –
Humidity55% · Dew point 10°
UV index7 High
Air Quality18 Good
Pressure30.15 inHg
Visibility6 mi
Sunrise / Sunset6:28 AM · 8:12 PM · 13h 44m

Weather map — Markham

Full radar →
Now
19°
3%
5 mph
10:00
21°
4%
4 mph
11:00
23°
3%
5 mph
12:00
23°
3%
8 mph
13:00
24°
3%
8 mph
14:00
24°
10%
7 mph
15:00
23°
1%
7 mph
16:00
26°
1%
7 mph
17:00
23°
1%
7 mph
18:00
23°
2%
7 mph
19:00
22°
3%
8 mph
20:00
21°
4%
7 mph
21:00
20°
5%
7 mph
22:00
20°
5%
7 mph
23:00
20°
5%
8 mph
00:00
20°
8%
8 mph
01:00
19°
7%
8 mph
02:00
20°
8%
9 mph
03:00
19°
21%
10 mph
04:00
19°
20%
10 mph
05:00
19°
22%
9 mph
06:00
19°
21%
8 mph
07:00
19°
21%
8 mph
08:00
19°
11%
8 mph

Today · Fri 8/21

High 26°
5% / –

Sunny. Winds SE at 8 mph.

Tonight · Fri 8/21

Low 19°
5% / –

Sunny. Winds E at 7 mph.

Tomorrow · Sat 8/22

23° | 18°
73% / 0.24 in

Sunny. Winds SE at 11 mph.

7-day trend

Markham · temperature + precipitation

10-day forecast

Updated 9:29 AM

Details & indices

Wind
5 mph NE
Gusts 9 mph
Humidity
55%
Dew point 10°
Pressure
30.15 inHg
Rising
UV index
7 — High
High today
Air Quality
Good
AQI 18 · US EPA
Allergy
Very high
Mugwort
Visibility
6 mi
Clear view
Allergy — Markham

🌿 Conditions right now

View all →
Birch
None
Grass
High
Oak
None
Alder
None
Hazel
None
Mugwort
Very high
Ragweed
Moderate

Sun & moon

Sunrise6:28 AM
Sunset8:12 PM
Length of day13h 44m
Moonrise4:24 PM
Moonset—
Moon phase🌓 First Quarter · 64%
Next full moonAug 28 Sturgeon Moon
Latitude43.8668°N
Longitude-79.2663°E

Water temps nearby

View all →
No beaches within 50 miles
🌤️No rain expected in the next 90 minutes
Now+30+60+90 min
Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast
Laundry day
Great
Line-drying weather
Grilling
Great
Fire up the grill
Running
Fair
Lace up outside
Patio
Great
Dinner outdoors
1991-2020 climate normals — Markham

Monthly normals

Full climate page →
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max (°F) -1° 1° 6° 11° 19° 24° 27° 26° 22° 15° 7° 3°
Min (°F) -8° -8° -3° 2° 9° 15° 18° 17° 14° 7° 0° -4°
Precip (in) 2.9 2.7 2.6 4.2 3.2 3.6 3.3 3.5 2.8 3.5 2.5 3.3
Warmest: Jul · ⌀ 81°F Coldest: Jan · ⌀ 17°F Wettest: Apr · 4.2 in
Nearby places in {{REGION}}
🌤️
Toronto
—
— 🌤️
Ottawa
—
— 🌤️
Mississauga
—
— 🌤️
Brampton
—
— 🌤️
Hamilton
—
— 🌤️
London
—
—
Data sources · Friday, August 21
Where the Markham forecast comes from
This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 43.8668°N, -79.2663°.
NBM + global weather models
Updated: 9:29 AM
Weather in Markham
Markham's outlook: warmest day near 26° (Friday), coldest night about 12° (Friday). Roughly 0.80 in of rain falls over the period, with Sunday the most likely wet day (81%). The NWS alert board for this area is currently clear. Right now Markham is running about 54° warmer than Rochester. Longer view: four full seasons with serious winter and real summer heat.
Markham, ON · Elev 551 ft · 43.87°N, 79.27°W · Ontario · Forecast computed for these exact coordinates
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 9:29 AM