Hourly Weather Forecast - Mattawa, Ontario, CA

12 AM
17°F
0%
3mph
SSE
Mostly Cloudy
Humidity
83%
Feels like
12°F
Dew Point
13°F
1 AM
18°F
0%
4mph
SE
Cloudy
Humidity
84%
Feels like
12°F
Dew Point
14°F
2 AM
20°F
10%
4mph
SSE
Cloudy
Humidity
85%
Feels like
14°F
Dew Point
16°F
3 AM
21°F
10%
4mph
SE
Cloudy
Humidity
86%
Feels like
15°F
Dew Point
18°F
4 AM
23°F
10%
5mph
SE
Cloudy
Humidity
87%
Feels like
17°F
Dew Point
20°F
5 AM
24°F
0%
6mph
SE
Cloudy
Humidity
87%
Feels like
17°F
Dew Point
21°F
6 AM
26°F
0%
7mph
SE
Cloudy
Humidity
87%
Feels like
18°F
Dew Point
22°F
7 AM
27°F
0%
7mph
SE
Cloudy
Humidity
86%
Feels like
19°F
Dew Point
23°F
7:53 AM
8 AM
29°F
0%
9mph
SSE
Cloudy
Humidity
85%
Feels like
21°F
Dew Point
25°F
9 AM
31°F
10%
9mph
SSE
Cloudy
Humidity
84%
Feels like
23°F
Dew Point
27°F
10 AM
33°F
10%
10mph
S
Cloudy
Humidity
83%
Feels like
25°F
Dew Point
29°F
11 AM
35°F
10%
10mph
S
Cloudy
Humidity
83%
Feels like
28°F
Dew Point
31°F
12 PM
37°F
20%
11mph
S
Cloudy
Humidity
84%
Feels like
29°F
Dew Point
33°F
1 PM
38°F
30%
13mph
S
30% Chance of Light Rain
Humidity
84%
Feels like
31°F
Dew Point
34°F
2 PM
39°F
40%
12mph
S
40% Chance of Light Rain
Humidity
85%
Feels like
32°F
Dew Point
35°F
3 PM
40°F
50%
12mph
S
50% Chance of Light Rain
Humidity
85%
Feels like
32°F
Dew Point
36°F
4 PM
40°F
60%
12mph
S
60% Chance of Light Rain
Humidity
85%
Feels like
33°F
Dew Point
36°F
4:29 PM
5 PM
40°F
70%
11mph
S
70% Chance of Rain
Humidity
85%
Feels like
33°F
Dew Point
36°F
6 PM
40°F
80%
11mph
S
80% Chance of Rain
Humidity
85%
Feels like
34°F
Dew Point
36°F
7 PM
40°F
80%
11mph
S
80% Chance of Rain
Humidity
85%
Feels like
33°F
Dew Point
36°F
8 PM
40°F
80%
10mph
S
80% Chance of Light Rain
Humidity
86%
Feels like
34°F
Dew Point
36°F
9 PM
40°F
80%
10mph
S
80% Chance of Light Rain
Humidity
86%
Feels like
33°F
Dew Point
36°F
10 PM
40°F
80%
10mph
S
80% Chance of Light Rain
Humidity
87%
Feels like
33°F
Dew Point
36°F
11 PM
40°F
70%
9mph
S
70% Chance of Light Rain
Humidity
89%
Feels like
33°F
Dew Point
37°F

Rainfall and Snowfall Totals Through Wednesday

Heavy Rain, Snow, and Winds Wallop Northwest

The atmospheric river this week continues to hit 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

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