Hourly Weather Forecast - Waterdown, Ontario, CA

12 AM
36°F
0%
7mph
WNW
Cloudy
Humidity
73%
Feels like
30°F
Dew Point
28°F
1 AM
35°F
0%
6mph
WNW
Cloudy
Humidity
74%
Feels like
29°F
Dew Point
27°F
2 AM
34°F
0%
6mph
WNW
Mostly Cloudy
Humidity
75%
Feels like
28°F
Dew Point
27°F
3 AM
33°F
0%
5mph
WNW
Mostly Cloudy
Humidity
75%
Feels like
28°F
Dew Point
26°F
4 AM
32°F
0%
5mph
WNW
Mostly Cloudy
Humidity
74%
Feels like
27°F
Dew Point
25°F
5 AM
31°F
0%
4mph
WNW
Mostly Cloudy
Humidity
75%
Feels like
26°F
Dew Point
24°F
6 AM
29°F
0%
4mph
WNW
Mostly Cloudy
Humidity
77%
Feels like
26°F
Dew Point
23°F
7 AM
29°F
0%
3mph
WNW
Partly Cloudy
Humidity
77%
Feels like
29°F
Dew Point
23°F
7:50 AM
8 AM
30°F
0%
3mph
WNW
Partly Cloudy
Humidity
74%
Feels like
30°F
Dew Point
23°F
9 AM
32°F
0%
2mph
WNW
Partly Cloudy
Humidity
70%
Feels like
32°F
Dew Point
23°F
10 AM
33°F
0%
2mph
WNW
Partly Cloudy
Humidity
64%
Feels like
33°F
Dew Point
23°F
11 AM
35°F
0%
2mph
WNW
Partly Cloudy
Humidity
59%
Feels like
35°F
Dew Point
22°F
12 PM
36°F
0%
1mph
W
Partly Cloudy
Humidity
56%
Feels like
36°F
Dew Point
21°F
1 PM
36°F
0%
1mph
WSW
Mostly Cloudy
Humidity
55%
Feels like
36°F
Dew Point
22°F
2 PM
37°F
0%
1mph
SW
Mostly Cloudy
Humidity
55%
Feels like
37°F
Dew Point
22°F
3 PM
36°F
0%
1mph
SSW
Mostly Cloudy
Humidity
58%
Feels like
36°F
Dew Point
23°F
4 PM
35°F
0%
1mph
S
Mostly Cloudy
Humidity
59%
Feels like
35°F
Dew Point
22°F
4:48 PM
5 PM
34°F
10%
1mph
S
Mostly Cloudy
Humidity
61%
Feels like
34°F
Dew Point
22°F
6 PM
33°F
10%
1mph
S
Mostly Cloudy
Humidity
65%
Feels like
33°F
Dew Point
22°F
7 PM
32°F
10%
1mph
SSE
Mostly Cloudy
Humidity
68%
Feels like
32°F
Dew Point
23°F
8 PM
33°F
10%
1mph
SSE
Partly Cloudy
Humidity
68%
Feels like
33°F
Dew Point
23°F
9 PM
33°F
10%
1mph
SSE
Partly Cloudy
Humidity
70%
Feels like
33°F
Dew Point
24°F
10 PM
33°F
20%
2mph
SSE
Partly Cloudy
Humidity
72%
Feels like
33°F
Dew Point
25°F
11 PM
33°F
30%
2mph
S
30% Chance Rain Showers
Humidity
74%
Feels like
33°F
Dew Point
26°F

Rain And Snow Totals Through Monday

Atmospheric River Impacts Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California through Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

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Today's Weather Outlook

Today's Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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