Hourly Weather Forecast - Upper Saint Clair, PA

7:39 AM
8 AM
17°F
0%
3mph
S
Hazy
Humidity
92%
Feels like
17°F
Dew Point
15°F
9 AM
22°F
0%
4mph
S
Mostly Sunny
Humidity
83%
Feels like
17°F
Dew Point
18°F
10 AM
27°F
0%
4mph
S
Mostly Sunny
Humidity
70%
Feels like
22°F
Dew Point
19°F
11 AM
32°F
0%
4mph
S
Partly Cloudy
Humidity
60%
Feels like
28°F
Dew Point
20°F
12 PM
37°F
0%
5mph
S
Mostly Cloudy
Humidity
53%
Feels like
33°F
Dew Point
21°F
1 PM
40°F
0%
5mph
S
Mostly Cloudy
Humidity
47%
Feels like
37°F
Dew Point
22°F
2 PM
42°F
0%
5mph
S
Partly Cloudy
Humidity
43%
Feels like
39°F
Dew Point
22°F
3 PM
43°F
0%
5mph
S
Mostly Cloudy
Humidity
43%
Feels like
40°F
Dew Point
22°F
4 PM
43°F
0%
5mph
S
Partly Cloudy
Humidity
45%
Feels like
39°F
Dew Point
23°F
4:56 PM
5 PM
42°F
0%
5mph
SSW
Partly Cloudy
Humidity
46%
Feels like
38°F
Dew Point
23°F
6 PM
41°F
0%
5mph
SSW
Partly Cloudy
Humidity
48%
Feels like
38°F
Dew Point
23°F
7 PM
42°F
0%
5mph
SSW
Partly Cloudy
Humidity
49%
Feels like
38°F
Dew Point
24°F
8 PM
42°F
10%
5mph
SSW
Partly Cloudy
Humidity
50%
Feels like
38°F
Dew Point
24°F
9 PM
41°F
10%
5mph
SW
Partly Cloudy
Humidity
52%
Feels like
38°F
Dew Point
25°F
10 PM
40°F
10%
5mph
SW
Partly Cloudy
Humidity
56%
Feels like
36°F
Dew Point
25°F
11 PM
39°F
10%
5mph
SW
Partly Cloudy
Humidity
59%
Feels like
35°F
Dew Point
26°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Weekend Weather Outlook

Weekend Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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