Now

60°

48%

8 mph

22:00

60°

43%

6 mph

23:00

60°

43%

4 mph

00:00

60°

43%

3 mph

01:00

61°

43%

2 mph

02:00

61°

49%

2 mph

03:00

61°

43%

4 mph

04:00

60°

43%

3 mph

05:00

60°

43%

3 mph

06:00

60°

43%

4 mph

07:00

60°

42%

4 mph

08:00

61°

30%

5 mph

09:00

64°

25%

6 mph

10:00

67°

23%

7 mph

11:00

71°

14%

8 mph

12:00

74°

15%

9 mph

13:00

74°

11%

9 mph

14:00

74°

7 mph

15:00

76°

9 mph

16:00

76°

9 mph

17:00

76°

7 mph

18:00

76°

5 mph

19:00

72°

3 mph

20:00

66°

3 mph

10-day forecast

Updated 9:33 PM

Sun · Today · 16 Aug Sunny

73° 54° 0.14 in

Mon · Tomorrow · 17 Aug Fog

76° 59° 0.00 in

Tuesday · 18 Aug Sunny

80° 54° 6%

Wednesday · 19 Aug Sunny

75° 60° 0.08 in

Thursday · 20 Aug Sunny

76° 57° 5%

Friday · 21 Aug Sunny

74° 52° 5%

Saturday · 22 Aug Showers

63° 56° 1.28 in

Sunday · 23 Aug Fog

73° 59° 0.05 in

Monday · 24 Aug Sunny

85° 59° 13%

Tuesday · 25 Aug Sunny

77° 60° 0.01 in

Details & indices

Wind

8 mph E

Gusts 13 mph

Humidity

97%

Dew point 59°

Pressure

29.85 inHg

Falling

UV index

5 — Moderate

High today

Air Quality

Good

AQI 27 · US EPA

Allergy

High

Mugwort

Visibility

1 mi

Reduced

Allergy — Perth

🌿 Conditions right now

View all →

Birch

None

Grass

Moderate

Oak

None

Alder

None

Hazel

None

Mugwort

High

Ragweed

Low

Sun & moon

Sunrise6:08 AM

Sunset8:10 PM

Length of day14h 2m

Moonrise10:44 AM

Moonset9:41 PM

Moon phase🌒 Waxing Crescent · 21%

Next full moonAug 28 Sturgeon Moon

Latitude44.9001°N

Longitude-76.2494°E

Water temps nearby

View all →

No beaches within 50 miles

🌦️Dry now — rain moving in around 9:45 PM (12 min)

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

Fair

Dinner outdoors

Nearby places in {{REGION}}

Data sources · Sunday, August 16

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: 9:33 PM

Weather in Perth

Perth's outlook: warmest day near 85° (Monday), coldest night about 52° (Friday). Roughly 1.6 in of rain falls over the period, with Saturday the most likely wet day (92%). No watches or warnings are active for the area right now. Right now Perth is about 15° cooler than nearby Montréal. 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 8/16

Tonight · Sun 8/16

Tomorrow · Mon 8/17

7-day trend

10-day forecast

Details & indices

🌿 Conditions right now

Sun & moon

Water temps nearby

Daily planner