Hourly Weather Forecast - Saint Clair, PA

12 AM
18°F
0%
1mph
W
Mostly Clear
Humidity
81%
Feels like
18°F
Dew Point
13°F
1 AM
17°F
0%
1mph
NW
Mostly Clear
Humidity
80%
Feels like
17°F
Dew Point
12°F
2 AM
15°F
0%
1mph
NW
Mostly Clear
Humidity
80%
Feels like
15°F
Dew Point
10°F
3 AM
15°F
0%
1mph
NW
Mostly Clear
Humidity
80%
Feels like
15°F
Dew Point
9°F
4 AM
14°F
0%
1mph
NW
Mostly Clear
Humidity
81%
Feels like
14°F
Dew Point
9°F
5 AM
13°F
0%
1mph
NW
Mostly Clear
Humidity
81%
Feels like
13°F
Dew Point
9°F
6 AM
13°F
0%
1mph
NW
Clear
Humidity
79%
Feels like
13°F
Dew Point
8°F
7 AM
15°F
0%
1mph
NW
Clear
Humidity
77%
Feels like
15°F
Dew Point
9°F
7:22 AM
8 AM
16°F
0%
1mph
NW
Sunny
Humidity
73%
Feels like
16°F
Dew Point
9°F
9 AM
19°F
0%
1mph
NW
Sunny
Humidity
68%
Feels like
19°F
Dew Point
10°F
10 AM
22°F
0%
1mph
WNW
Sunny
Humidity
63%
Feels like
22°F
Dew Point
11°F
11 AM
24°F
0%
1mph
WNW
Sunny
Humidity
59%
Feels like
24°F
Dew Point
12°F
12 PM
26°F
0%
2mph
WNW
Partly Cloudy
Humidity
56%
Feels like
26°F
Dew Point
13°F
1 PM
27°F
0%
2mph
W
Partly Cloudy
Humidity
56%
Feels like
27°F
Dew Point
14°F
2 PM
28°F
0%
2mph
W
Partly Cloudy
Humidity
57%
Feels like
28°F
Dew Point
15°F
3 PM
28°F
0%
2mph
SW
Partly Cloudy
Humidity
59%
Feels like
28°F
Dew Point
15°F
4 PM
27°F
0%
2mph
SSW
Mostly Cloudy
Humidity
62%
Feels like
27°F
Dew Point
16°F
4:38 PM
5 PM
26°F
0%
2mph
SSW
Partly Cloudy
Humidity
65%
Feels like
26°F
Dew Point
16°F
6 PM
25°F
0%
1mph
S
Partly Cloudy
Humidity
68%
Feels like
25°F
Dew Point
15°F
7 PM
24°F
0%
1mph
S
Partly Cloudy
Humidity
69%
Feels like
24°F
Dew Point
15°F
8 PM
23°F
0%
2mph
S
Mostly Clear
Humidity
72%
Feels like
23°F
Dew Point
15°F
9 PM
23°F
0%
2mph
SSW
Mostly Clear
Humidity
73%
Feels like
23°F
Dew Point
15°F
10 PM
22°F
0%
2mph
SSW
Clear
Humidity
73%
Feels like
22°F
Dew Point
15°F
11 PM
22°F
0%
2mph
SW
Clear
Humidity
74%
Feels like
22°F
Dew Point
15°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

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