Hourly Weather Forecast - Saint Clair, PA

12 AM
30°F
10%
0mph
NNW
Mostly Cloudy
Humidity
86%
Feels like
30°F
Dew Point
27°F
1 AM
29°F
10%
0mph
NNW
Mostly Cloudy
Humidity
87%
Feels like
29°F
Dew Point
25°F
2 AM
27°F
10%
0mph
NNE
Partly Cloudy
Humidity
89%
Feels like
27°F
Dew Point
24°F
3 AM
26°F
10%
0mph
NE
Clear
Humidity
90%
Feels like
26°F
Dew Point
23°F
4 AM
25°F
10%
0mph
E
Hazy
Humidity
91%
Feels like
25°F
Dew Point
22°F
5 AM
24°F
10%
0mph
ENE
Hazy
Humidity
91%
Feels like
24°F
Dew Point
22°F
6 AM
24°F
10%
0mph
ENE
Hazy
Humidity
91%
Feels like
24°F
Dew Point
22°F
7 AM
25°F
10%
1mph
E
Clear
Humidity
90%
Feels like
25°F
Dew Point
22°F
7:23 AM
8 AM
26°F
10%
1mph
ESE
Sunny
Humidity
88%
Feels like
26°F
Dew Point
23°F
9 AM
29°F
10%
1mph
SE
Sunny
Humidity
84%
Feels like
29°F
Dew Point
25°F
10 AM
33°F
10%
2mph
SE
Sunny
Humidity
80%
Feels like
33°F
Dew Point
27°F
11 AM
36°F
10%
3mph
SE
Mostly Sunny
Humidity
75%
Feels like
36°F
Dew Point
28°F
12 PM
38°F
10%
4mph
SE
Partly Cloudy
Humidity
71%
Feels like
35°F
Dew Point
29°F
1 PM
39°F
10%
5mph
SE
Partly Cloudy
Humidity
70%
Feels like
36°F
Dew Point
30°F
2 PM
40°F
10%
5mph
SE
Partly Cloudy
Humidity
71%
Feels like
36°F
Dew Point
31°F
3 PM
40°F
10%
6mph
SE
Partly Cloudy
Humidity
75%
Feels like
36°F
Dew Point
33°F
4 PM
40°F
10%
6mph
SE
Partly Cloudy
Humidity
80%
Feels like
36°F
Dew Point
34°F
4:39 PM
5 PM
39°F
10%
5mph
SE
Partly Cloudy
Humidity
85%
Feels like
35°F
Dew Point
35°F
6 PM
39°F
30%
5mph
ESE
30% Chance of Light Rain
Humidity
89%
Feels like
36°F
Dew Point
36°F
7 PM
39°F
30%
5mph
SE
30% Chance of Light Rain
Humidity
92%
Feels like
36°F
Dew Point
37°F
8 PM
39°F
50%
5mph
SE
50% Chance of Light Rain
Humidity
95%
Feels like
36°F
Dew Point
38°F
9 PM
40°F
80%
5mph
SE
80% Chance of Light Rain
Humidity
97%
Feels like
36°F
Dew Point
39°F
10 PM
41°F
80%
6mph
SE
80% Chance of Light Rain
Humidity
98%
Feels like
37°F
Dew Point
40°F
11 PM
42°F
90%
7mph
SSE
Light Rain
Humidity
98%
Feels like
37°F
Dew Point
42°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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