Hourly Weather Forecast - Perth, Ontario, CA

12 AM
8°F
0%
8mph
WNW
Clear
Humidity
74%
Feels like
-4°F
Dew Point
1°F
1 AM
8°F
10%
7mph
WNW
Clear
Humidity
76%
Feels like
-4°F
Dew Point
2°F
2 AM
9°F
10%
7mph
WNW
Clear
Humidity
75%
Feels like
-3°F
Dew Point
2°F
3 AM
10°F
10%
6mph
WNW
Clear
Humidity
74%
Feels like
-1°F
Dew Point
3°F
4 AM
11°F
10%
6mph
WNW
Clear
Humidity
73%
Feels like
1°F
Dew Point
4°F
5 AM
12°F
10%
6mph
WNW
Clear
Humidity
74%
Feels like
2°F
Dew Point
5°F
6 AM
11°F
10%
5mph
WNW
Mostly Clear
Humidity
77%
Feels like
3°F
Dew Point
6°F
7 AM
10°F
10%
5mph
WNW
Partly Cloudy
Humidity
83%
Feels like
1°F
Dew Point
6°F
7:40 AM
8 AM
9°F
10%
5mph
WNW
Partly Cloudy
Humidity
88%
Feels like
0°F
Dew Point
6°F
9 AM
10°F
10%
5mph
WNW
Mostly Cloudy
Humidity
87%
Feels like
1°F
Dew Point
7°F
10 AM
13°F
10%
5mph
WNW
Cloudy
Humidity
80%
Feels like
4°F
Dew Point
8°F
11 AM
16°F
10%
6mph
WNW
Cloudy
Humidity
72%
Feels like
8°F
Dew Point
8°F
12 PM
18°F
10%
6mph
WNW
Cloudy
Humidity
67%
Feels like
10°F
Dew Point
9°F
1 PM
19°F
10%
6mph
WNW
Cloudy
Humidity
64%
Feels like
11°F
Dew Point
9°F
2 PM
19°F
10%
5mph
WNW
Cloudy
Humidity
62%
Feels like
12°F
Dew Point
8°F
3 PM
19°F
10%
5mph
WNW
Cloudy
Humidity
62%
Feels like
12°F
Dew Point
8°F
4 PM
18°F
10%
4mph
W
Cloudy
Humidity
63%
Feels like
11°F
Dew Point
7°F
4:26 PM
5 PM
17°F
0%
4mph
W
Cloudy
Humidity
66%
Feels like
10°F
Dew Point
7°F
6 PM
15°F
10%
4mph
WSW
Cloudy
Humidity
70%
Feels like
9°F
Dew Point
7°F
7 PM
15°F
10%
4mph
WSW
Cloudy
Humidity
74%
Feels like
9°F
Dew Point
8°F
8 PM
14°F
10%
4mph
WSW
Cloudy
Humidity
76%
Feels like
8°F
Dew Point
8°F
9 PM
14°F
20%
4mph
WSW
Cloudy
Humidity
77%
Feels like
8°F
Dew Point
9°F
10 PM
14°F
20%
4mph
SW
Mostly Cloudy
Humidity
78%
Feels like
8°F
Dew Point
9°F
11 PM
14°F
30%
3mph
SW
30% Chance of Flurries
Humidity
79%
Feels like
9°F
Dew Point
9°F

Rainfall and Snowfall Totals Through Thursday

Flooding Rain, Heavy Snow and Winds Slam Northwest, North-Central U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Thursday's Weather Outlook

Thursday'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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