Now

69°

32%

11 mph

04:00

70°

31%

14 mph

05:00

71°

29%

15 mph

06:00

70°

30%

15 mph

07:00

69°

23%

15 mph

08:00

47°

21%

16 mph

09:00

47°

22%

16 mph

10:00

47°

20%

18 mph

11:00

47°

23%

20 mph

12:00

47°

22%

21 mph

13:00

47°

21%

21 mph

14:00

47°

24%

22 mph

15:00

48°

24%

22 mph

16:00

48°

26%

22 mph

17:00

48°

26%

22 mph

18:00

48°

27%

23 mph

19:00

48°

27%

25 mph

20:00

48°

28%

23 mph

21:00

48°

28%

25 mph

22:00

48°

28%

25 mph

23:00

49°

28%

26 mph

00:00

49°

29%

26 mph

01:00

49°

29%

26 mph

02:00

49°

30%

27 mph

10-day forecast

Updated 3:27 AM

Mon · Today · 17 Aug Mostly cloudy

71° 47° 35%

Tue · Tomorrow · 18 Aug Mostly cloudy

50° 49° 0.01 in

Wednesday · 19 Aug Drizzle

51° 48° 0.31 in

Thursday · 20 Aug Showers

48° 45° 0.03 in

Friday · 21 Aug Mostly cloudy

46° 45° 14%

Saturday · 22 Aug Partly cloudy

46° 45° 29%

Sunday · 23 Aug Sunny

46° 44° 12%

Monday · 24 Aug Mostly cloudy

47° 45° 17%

Tuesday · 25 Aug Showers

49° 47° 0.35 in

Wednesday · 26 Aug Showers

47° 44° 0.33 in

Details & indices

Wind

11 mph NW

Gusts 12 mph

Humidity

93%

Dew point 67°

Pressure

30.33 inHg

Rising

UV index

7 — High

High today

Air Quality

Good

AQI 33 · US EPA

Allergy

Very high

Mugwort

Visibility

6 mi

Clear view

Allergy — Yonge-St.Clair

🌿 Conditions right now

View all →

Birch

None

Grass

High

Oak

None

Alder

None

Hazel

None

Mugwort

Very high

Ragweed

Low

Sun & moon

Sunrise6:24 AM

Sunset8:18 PM

Length of day13h 54m

Moonrise12:05 PM

Moonset10:18 PM

Moon phase🌒 Waxing Crescent · 23%

Next full moonAug 28 Sturgeon Moon

Latitude43.6879°N

Longitude-79.3979°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

Poor

Line-drying weather

Grilling

Fair

Fire up the grill

Running

Poor

Lace up outside

Patio

Poor

Dinner outdoors

Nearby places in {{REGION}}

🌤️

Data sources · Monday, August 17

Where the Yonge-St.Clair 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: 43.6879°N, -79.3979°.

NBM + global weather models

Updated: 3:27 AM

Weather in Yonge-St.Clair

Yonge-St.Clair's outlook: warmest day near 71° (Monday), coldest night about 44° (Wednesday). Roughly 1.0 in of rain falls over the period, with Wednesday the most likely wet day (93%). Hold onto the patio furniture Wednesday: gusts could hit 61 mph. No watches or warnings are active for the area right now. Right now Yonge-St.Clair is about 2° cooler than nearby Rochester. Longer view: four full seasons with serious winter and real summer heat.

Yonge-St.Clair, ON · Elev 509 ft · 43.69°N, 79.40°W · Ontario · Forecast computed for these exact coordinates

Yonge-St.Clair, ON Weather

Weather map — Yonge-St.Clair

Today · Mon 8/17

Overnight · Mon 8/17

Tomorrow · Tue 8/18

7-day trend

10-day forecast

Details & indices

🌿 Conditions right now

Sun & moon

Water temps nearby

Daily planner