Hourly Weather Forecast - Perth, Ontario, CA

11 AM
16°F
0%
6mph
WSW
Mostly Cloudy
Humidity
70%
Feels like
8°F
Dew Point
8°F
12 PM
18°F
0%
6mph
SW
Mostly Cloudy
Humidity
70%
Feels like
10°F
Dew Point
10°F
1 PM
20°F
10%
7mph
SW
Mostly Cloudy
Humidity
66%
Feels like
11°F
Dew Point
10°F
2 PM
20°F
10%
7mph
SW
Mostly Cloudy
Humidity
66%
Feels like
12°F
Dew Point
11°F
3 PM
20°F
10%
6mph
SW
Mostly Cloudy
Humidity
71%
Feels like
12°F
Dew Point
12°F
4 PM
19°F
30%
6mph
SW
30% Chance of Snow
Humidity
82%
Feels like
11°F
Dew Point
15°F
4:24 PM
5 PM
17°F
30%
6mph
SW
30% Chance of Snow
Humidity
89%
Feels like
9°F
Dew Point
15°F
6 PM
16°F
0%
6mph
SW
Cloudy
Humidity
89%
Feels like
7°F
Dew Point
14°F
7 PM
16°F
0%
7mph
SW
Mostly Cloudy
Humidity
94%
Feels like
7°F
Dew Point
15°F
8 PM
16°F
0%
7mph
WSW
Mostly Cloudy
Humidity
91%
Feels like
6°F
Dew Point
14°F
9 PM
16°F
0%
7mph
WSW
Mostly Cloudy
Humidity
87%
Feels like
6°F
Dew Point
13°F
10 PM
15°F
0%
7mph
WSW
Mostly Cloudy
Humidity
87%
Feels like
5°F
Dew Point
12°F
11 PM
14°F
0%
7mph
WSW
Mostly Cloudy
Humidity
88%
Feels like
4°F
Dew Point
11°F

Rainfall Totals Through Wednesday A.M.

Heavy Rain Returns to Deluge Pacific Northwest

Another atmospheric river will hit the Pacific Northwest with heavy rain and high winds.

Monday's Weather Outlook

Today's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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