Hourly Weather Forecast - Saint Clair, PA

12 AM
26°F
0%
13mph
WNW
Partly Cloudy
Humidity
60%
Feels like
14°F
Dew Point
14°F
1 AM
26°F
0%
13mph
WNW
Partly Cloudy
Humidity
60%
Feels like
15°F
Dew Point
14°F
2 AM
26°F
0%
11mph
WNW
Partly Cloudy
Humidity
60%
Feels like
15°F
Dew Point
14°F
3 AM
25°F
0%
10mph
WNW
Mostly Clear
Humidity
59%
Feels like
15°F
Dew Point
13°F
4 AM
25°F
0%
8mph
WNW
Mostly Clear
Humidity
60%
Feels like
16°F
Dew Point
13°F
5 AM
24°F
0%
7mph
WNW
Mostly Clear
Humidity
61%
Feels like
17°F
Dew Point
13°F
6 AM
24°F
0%
5mph
WNW
Partly Cloudy
Humidity
62%
Feels like
17°F
Dew Point
13°F
7 AM
24°F
0%
4mph
W
Mostly Cloudy
Humidity
63%
Feels like
19°F
Dew Point
13°F
7:24 AM
8 AM
25°F
0%
3mph
WNW
Cloudy
Humidity
62%
Feels like
21°F
Dew Point
13°F
9 AM
26°F
0%
3mph
WNW
Cloudy
Humidity
60%
Feels like
22°F
Dew Point
14°F
10 AM
28°F
0%
4mph
WNW
Cloudy
Humidity
56%
Feels like
24°F
Dew Point
14°F
11 AM
29°F
0%
4mph
W
Mostly Cloudy
Humidity
53%
Feels like
25°F
Dew Point
14°F
12 PM
31°F
0%
4mph
SW
Partly Cloudy
Humidity
51%
Feels like
27°F
Dew Point
15°F
1 PM
32°F
0%
4mph
SSW
Partly Cloudy
Humidity
51%
Feels like
28°F
Dew Point
16°F
2 PM
32°F
0%
4mph
SSW
Partly Cloudy
Humidity
53%
Feels like
29°F
Dew Point
17°F
3 PM
32°F
0%
4mph
S
Partly Cloudy
Humidity
56%
Feels like
28°F
Dew Point
18°F
4 PM
32°F
0%
4mph
S
Partly Cloudy
Humidity
60%
Feels like
27°F
Dew Point
19°F
4:40 PM
5 PM
31°F
0%
4mph
S
Mostly Cloudy
Humidity
64%
Feels like
26°F
Dew Point
20°F
6 PM
31°F
0%
5mph
S
Mostly Cloudy
Humidity
66%
Feels like
25°F
Dew Point
21°F
7 PM
31°F
0%
6mph
S
Cloudy
Humidity
68%
Feels like
25°F
Dew Point
22°F
8 PM
32°F
0%
6mph
S
Cloudy
Humidity
67%
Feels like
26°F
Dew Point
22°F
9 PM
33°F
0%
6mph
S
Cloudy
Humidity
66%
Feels like
27°F
Dew Point
23°F
10 PM
34°F
10%
6mph
S
Cloudy
Humidity
65%
Feels like
28°F
Dew Point
23°F
11 PM
34°F
10%
6mph
S
Cloudy
Humidity
64%
Feels like
29°F
Dew Point
24°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

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