Hourly Weather Forecast - Mattawa, Ontario, CA

12 AM
20°F
0%
4mph
WSW
Partly Cloudy
Humidity
89%
Feels like
14°F
Dew Point
17°F
1 AM
19°F
0%
4mph
WSW
Partly Cloudy
Humidity
89%
Feels like
13°F
Dew Point
17°F
2 AM
18°F
30%
3mph
WSW
30% Chance of Snow
Humidity
89%
Feels like
13°F
Dew Point
15°F
3 AM
17°F
0%
3mph
SW
Partly Cloudy
Humidity
88%
Feels like
17°F
Dew Point
14°F
4 AM
16°F
0%
3mph
SW
Partly Cloudy
Humidity
88%
Feels like
16°F
Dew Point
13°F
5 AM
15°F
0%
3mph
SW
Partly Cloudy
Humidity
87%
Feels like
15°F
Dew Point
11°F
6 AM
13°F
0%
3mph
SSW
Partly Cloudy
Humidity
86%
Feels like
13°F
Dew Point
10°F
7 AM
13°F
0%
3mph
SSW
Partly Cloudy
Humidity
85%
Feels like
13°F
Dew Point
10°F
7:51 AM
8 AM
15°F
0%
4mph
S
Mostly Cloudy
Humidity
85%
Feels like
9°F
Dew Point
11°F
9 AM
17°F
0%
4mph
S
Mostly Cloudy
Humidity
85%
Feels like
10°F
Dew Point
13°F
10 AM
20°F
0%
6mph
SSW
Mostly Cloudy
Humidity
85%
Feels like
12°F
Dew Point
16°F
11 AM
22°F
30%
7mph
SSW
30% Chance of Snow
Humidity
84%
Feels like
14°F
Dew Point
19°F
12 PM
26°F
0%
9mph
SSW
Mostly Cloudy
Humidity
83%
Feels like
17°F
Dew Point
21°F
1 PM
28°F
0%
10mph
SSW
Mostly Cloudy
Humidity
81%
Feels like
19°F
Dew Point
23°F
2 PM
28°F
0%
11mph
SSW
Mostly Cloudy
Humidity
80%
Feels like
19°F
Dew Point
23°F
3 PM
28°F
10%
11mph
SSW
Mostly Cloudy
Humidity
80%
Feels like
19°F
Dew Point
22°F
4 PM
27°F
0%
11mph
SSW
Cloudy
Humidity
79%
Feels like
18°F
Dew Point
22°F
4:29 PM
5 PM
27°F
0%
11mph
SSW
Cloudy
Humidity
80%
Feels like
17°F
Dew Point
22°F
6 PM
26°F
0%
11mph
SSW
Cloudy
Humidity
82%
Feels like
16°F
Dew Point
21°F
7 PM
26°F
0%
11mph
SSW
Cloudy
Humidity
83%
Feels like
15°F
Dew Point
21°F
8 PM
26°F
0%
11mph
SSW
Cloudy
Humidity
83%
Feels like
16°F
Dew Point
22°F
9 PM
27°F
0%
11mph
SSW
Cloudy
Humidity
83%
Feels like
17°F
Dew Point
22°F
10 PM
28°F
10%
11mph
SSW
Cloudy
Humidity
83%
Feels like
18°F
Dew Point
23°F
11 PM
29°F
10%
11mph
SSW
Cloudy
Humidity
84%
Feels like
19°F
Dew Point
24°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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide