Hourly Weather Forecast - Grand Valley, Ontario, CA

1 AM
19°F
70%
11mph
W
70% Chance Frozen Mix
Humidity
78%
Feels like
7°F
Dew Point
13°F
2 AM
19°F
0%
9mph
W
Mostly Cloudy
Humidity
78%
Feels like
9°F
Dew Point
14°F
3 AM
19°F
0%
8mph
WSW
Partly Cloudy
Humidity
78%
Feels like
10°F
Dew Point
14°F
4 AM
19°F
0%
8mph
WSW
Partly Cloudy
Humidity
79%
Feels like
10°F
Dew Point
14°F
5 AM
19°F
0%
8mph
SW
Mostly Cloudy
Humidity
79%
Feels like
9°F
Dew Point
14°F
6 AM
19°F
10%
9mph
SSW
Mostly Cloudy
Humidity
79%
Feels like
9°F
Dew Point
14°F
7 AM
19°F
10%
10mph
SSW
Mostly Cloudy
Humidity
80%
Feels like
8°F
Dew Point
14°F
7:51 AM
8 AM
19°F
10%
11mph
SSW
Partly Cloudy
Humidity
80%
Feels like
7°F
Dew Point
14°F
9 AM
21°F
10%
13mph
S
Mostly Cloudy
Humidity
78%
Feels like
8°F
Dew Point
15°F
10 AM
22°F
30%
14mph
S
30% Chance of Flurries
Humidity
74%
Feels like
10°F
Dew Point
15°F
11 AM
24°F
30%
15mph
S
30% Chance of Snow
Humidity
73%
Feels like
11°F
Dew Point
16°F
12 PM
24°F
30%
16mph
S
30% Chance of Snow
Humidity
72%
Feels like
12°F
Dew Point
17°F
1 PM
26°F
30%
16mph
S
30% Chance of Snow
Humidity
71%
Feels like
13°F
Dew Point
18°F
2 PM
27°F
30%
16mph
SSW
30% Chance of Flurries
Humidity
69%
Feels like
15°F
Dew Point
18°F
3 PM
28°F
10%
16mph
SSW
Mostly Cloudy
Humidity
68%
Feels like
16°F
Dew Point
19°F
4 PM
29°F
10%
17mph
SW
Cloudy
Humidity
69%
Feels like
17°F
Dew Point
20°F
4:45 PM
5 PM
30°F
30%
18mph
SW
30% Chance of Flurries
Humidity
71%
Feels like
18°F
Dew Point
22°F
6 PM
30°F
30%
18mph
SW
30 % Chance of Heavy Snow
Humidity
74%
Feels like
18°F
Dew Point
23°F
7 PM
30°F
30%
18mph
WSW
30 % Chance of Heavy Snow
Humidity
77%
Feels like
17°F
Dew Point
23°F
8 PM
29°F
30%
18mph
WSW
30% Chance of Snow
Humidity
80%
Feels like
17°F
Dew Point
24°F
9 PM
29°F
0%
18mph
WSW
Cloudy
Humidity
80%
Feels like
17°F
Dew Point
24°F
10 PM
29°F
0%
19mph
WSW
Mostly Cloudy
Humidity
81%
Feels like
16°F
Dew Point
24°F
11 PM
28°F
0%
20mph
WSW
Partly Cloudy
Humidity
81%
Feels like
15°F
Dew Point
23°F

Forecast Wind Gusts For Today

Storm Pummels Northeast U.S.

A strong disturbance will gradually exit the Northeast tonight while delivering rain and thunderstorms, snow and strong wind gusts.

Rain And Snow Totals Through Tonight

Atmospheric River Impacts Pacific Northwest

NOAA, NCDC

White Christmas? What Are The Odds

Weekend Weather Outlook

Weekend Weather Outlook

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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide