Now

23°

0.65 in

11 mph

16:00

22°

0.65 in

12 mph

17:00

20°

0.03 in

12 mph

18:00

19°

46%

12 mph

19:00

18°

42%

12 mph

20:00

17°

37%

11 mph

21:00

16°

33%

10 mph

22:00

15°

23%

9 mph

23:00

15°

30%

7 mph

00:00

14°

30%

7 mph

01:00

14°

34%

6 mph

02:00

14°

30%

6 mph

03:00

13°

22%

6 mph

04:00

13°

42%

5 mph

05:00

13°

38%

4 mph

06:00

14°

28%

4 mph

07:00

14°

19%

5 mph

08:00

14°

13%

7 mph

09:00

16°

27%

8 mph

10:00

17°

0.02 in

7 mph

11:00

18°

20%

8 mph

12:00

19°

36%

10 mph

13:00

18°

0.03 in

11 mph

14:00

16°

0.04 in

12 mph

10-day forecast

Updated 3:40 PM

Sun · Today · 23 Aug Showers

23° 15° 5.37 in

Mon · Tomorrow · 24 Aug Showers

19° 13° 0.23 in

Tuesday · 25 Aug Fog

22° 12° 0.01 in

Wednesday · 26 Aug Mostly cloudy

23° 14° 24%

Thursday · 27 Aug Sunny

26° 15° 0.26 in

Friday · 28 Aug Sunny

24° 14° 12%

Saturday · 29 Aug Sunny

20° 13° 7%

Sunday · 30 Aug Sunny

22° 11° 7%

Monday · 31 Aug Mostly cloudy

26° 14° 0.04 in

Tuesday · 1 Sep Showers

26° 16° 0.35 in

Details & indices

Wind

11 mph S

Gusts 19 mph

Humidity

68%

Dew point 17°

Pressure

29.65 inHg

Falling

UV index

5 — Moderate

High today

Air Quality

Good

AQI 39 · US EPA

Allergy

Low

Mugwort

Visibility

6 mi

Clear view

Allergy — Perth

🌿 Conditions right now

View all →

Birch

None

Grass

Low

Oak

None

Alder

None

Hazel

None

Mugwort

Low

Ragweed

Low

Sun & moon

Sunrise6:16 AM

Sunset7:58 PM

Length of day13h 42m

Moonrise5:53 PM

Moonset1:09 AM

Moon phase🌔 Waxing Gibbous · 83%

Next full moonAug 28 Sturgeon Moon

Latitude44.9001°N

Longitude-76.2494°E

Water temps nearby

View all →

No beaches within 50 miles

Daily planner

computed from today's forecast

Laundry day

Fair

Line-drying weather

Grilling

Fair

Fire up the grill

Running

Poor

Lace up outside

Patio

Fair

Dinner outdoors

Nearby places in {{REGION}}

🌤️

Data sources · Sunday, August 23

Where the Perth 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: 44.9001°N, -76.2494°.

NBM + global weather models

Updated: 3:40 PM

Weather in Perth

Perth's outlook: warmest day near 26° (Thursday), coldest night about 11° (Sunday). Roughly 6.3 in of rain falls over the period, with Monday the most likely wet day (86%). Wind is the one to watch: gusts to 34 mph around Monday. No watches or warnings are active for the area right now. Right now Perth is running about 56° warmer than Ottawa. Longer view: four full seasons with serious winter and real summer heat.

Perth, ON · Elev 440 ft · 44.90°N, 76.25°W · Ontario · Forecast computed for these exact coordinates

Perth, ON Weather

Weather map — Perth

Today · Sun 8/23

Tonight · Sun 8/23

Tomorrow · Mon 8/24

7-day trend

10-day forecast

Details & indices

🌿 Conditions right now

Sun & moon

Water temps nearby

Daily planner