Hourly Weather Forecast - Perth, Ontario, CA

12 PM
37°F
0%
11mph
S
Mostly Cloudy
Humidity
72%
Feels like
29°F
Dew Point
29°F
1 PM
38°F
0%
12mph
S
Mostly Cloudy
Humidity
68%
Feels like
31°F
Dew Point
28°F
2 PM
39°F
0%
13mph
S
Mostly Cloudy
Humidity
65%
Feels like
31°F
Dew Point
28°F
3 PM
39°F
10%
13mph
S
Partly Cloudy
Humidity
65%
Feels like
31°F
Dew Point
28°F
4 PM
38°F
10%
13mph
S
Partly Cloudy
Humidity
69%
Feels like
30°F
Dew Point
29°F
4:25 PM
5 PM
38°F
0%
13mph
S
Partly Cloudy
Humidity
70%
Feels like
30°F
Dew Point
29°F
6 PM
38°F
0%
13mph
S
Mostly Clear
Humidity
70%
Feels like
29°F
Dew Point
29°F
7 PM
37°F
0%
13mph
S
Partly Cloudy
Humidity
72%
Feels like
29°F
Dew Point
29°F
8 PM
37°F
0%
13mph
S
Partly Cloudy
Humidity
75%
Feels like
29°F
Dew Point
30°F
9 PM
37°F
0%
13mph
S
Mostly Cloudy
Humidity
76%
Feels like
29°F
Dew Point
31°F
10 PM
37°F
20%
13mph
S
Partly Cloudy
Humidity
81%
Feels like
29°F
Dew Point
32°F
11 PM
38°F
50%
13mph
S
50% Chance of Light Rain
Humidity
87%
Feels like
30°F
Dew Point
34°F

Forecast Peak Wind Gusts Today

High Winds, Rain, and Snow Cross the Country

A clipper moving over the Great Lakes brings rain, snow, and high winds through the Atlantic Coastline.

Rainfall and Snowfall Totals Through Friday

Atmospheric River Symptoms Repeat in the Northwest

Thursday's Weather Outlook

Today's Weather Outlook

Flu Update Valid For Week Ending December 6, 2025

Weekly Flu Update: Flu Exceeds Annual Baseline

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

How to Measure Snow via NWS

How To Measure Snow

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