Hourly Weather Forecast - Mattawa, Ontario, CA

12 AM
6°F
20%
4mph
WNW
Partly Cloudy
Humidity
77%
Feels like
-2°F
Dew Point
1°F
1 AM
6°F
20%
4mph
WNW
Partly Cloudy
Humidity
78%
Feels like
-2°F
Dew Point
0°F
2 AM
5°F
20%
3mph
WNW
Partly Cloudy
Humidity
79%
Feels like
-2°F
Dew Point
0°F
3 AM
4°F
20%
3mph
W
Partly Cloudy
Humidity
80%
Feels like
-2°F
Dew Point
0°F
4 AM
4°F
10%
3mph
W
Mostly Clear
Humidity
81%
Feels like
-2°F
Dew Point
0°F
5 AM
4°F
10%
3mph
W
Mostly Clear
Humidity
81%
Feels like
-3°F
Dew Point
-1°F
6 AM
4°F
10%
3mph
W
Mostly Clear
Humidity
81%
Feels like
-3°F
Dew Point
-1°F
7 AM
4°F
10%
3mph
W
Partly Cloudy
Humidity
81%
Feels like
-3°F
Dew Point
0°F
7:55 AM
8 AM
6°F
10%
3mph
W
Partly Cloudy
Humidity
80%
Feels like
-1°F
Dew Point
1°F
9 AM
8°F
10%
3mph
W
Mostly Cloudy
Humidity
78%
Feels like
1°F
Dew Point
2°F
10 AM
10°F
10%
3mph
W
Mostly Cloudy
Humidity
76%
Feels like
4°F
Dew Point
4°F
11 AM
13°F
10%
4mph
W
Mostly Cloudy
Humidity
73%
Feels like
6°F
Dew Point
6°F
12 PM
16°F
10%
4mph
W
Cloudy
Humidity
70%
Feels like
9°F
Dew Point
8°F
1 PM
18°F
10%
4mph
W
Cloudy
Humidity
69%
Feels like
11°F
Dew Point
9°F
2 PM
19°F
10%
4mph
W
Cloudy
Humidity
69%
Feels like
12°F
Dew Point
10°F
3 PM
19°F
10%
4mph
WSW
Cloudy
Humidity
70%
Feels like
13°F
Dew Point
11°F
4 PM
19°F
30%
4mph
WSW
30% Chance of Flurries
Humidity
72%
Feels like
13°F
Dew Point
12°F
4:31 PM
5 PM
18°F
30%
4mph
WSW
30% Chance of Snow
Humidity
75%
Feels like
13°F
Dew Point
12°F
6 PM
17°F
30%
3mph
SW
30% Chance of Snow
Humidity
78%
Feels like
12°F
Dew Point
11°F
7 PM
16°F
30%
3mph
SW
30% Chance of Snow
Humidity
80%
Feels like
16°F
Dew Point
11°F
8 PM
16°F
30%
3mph
SSW
30% Chance of Snow
Humidity
81%
Feels like
16°F
Dew Point
11°F
9 PM
15°F
30%
2mph
SSW
30% Chance of Snow
Humidity
82%
Feels like
15°F
Dew Point
11°F
10 PM
15°F
30%
2mph
S
30% Chance of Snow
Humidity
83%
Feels like
15°F
Dew Point
11°F
11 PM
15°F
30%
2mph
S
30% Chance of Snow
Humidity
83%
Feels like
15°F
Dew Point
11°F

Rainfall and Snowfall Totals Through Thursday

Pineapple Express Slams Northwestern U.S.

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

Wednesday'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