Upper Saint Clair, PA Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Cloudy 14°F
Feels Like 11°F  
Humidity 83% Dew Point 10°F Wind E 2 MPH Gusts 3 Barometer 30.2 in.
Report from a personal weather station 1.3 mi. SSE of central Upper Saint Clair
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Point Forecast at a Glance

MonDec 15
Mon Dec 15: Mostly Clear, Low 11F
 
11
TueDec 16
Tue Dec 16: Increasing Clouds, High 34F, Low 27F
34
27
WedDec 17
Wed Dec 17: Mostly Cloudy, High 41F, Low 26F
41
26
ThuDec 18
Thu Dec 18: Rain, High 50F, Low 26F
50%
50
26
FriDec 19
Fri Dec 19: Mostly Cloudy, High 32F, Low 20F
32
20
SatDec 20
Sat Dec 20: Mostly Cloudy, High 44F, Low 32F
44
32
SunDec 21
Sun Dec 21: Rain, High 42F, Low 27F
30%
42
27

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7-Day Temperature Trend

Week Ahead Summary

Variable high temperatures with a significant drop to 32°F mid-week, recovering to 42°F. Some rain possible with at least 3 days showing precipitation chances of 20% or higher.

Climate Context

Temperatures are expected to be near normal for this time of year, with highs around 42°F and lows around 26°F.

This Date in Weather History

1945 - A record December snowstorm buried Buffalo, NY, under 36.6 inches of snow, with unofficial totals south of the city ranging up to 70 inches. Travel was brought to a halt by the storm.

More on this and other weather history

Upper Saint Clair, PA 7 Day Weather Forecast Details

Monday Dec 15

Mostly Clear

Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 11. Southwest wind 5 to 8 mph.

Tuesday Dec 16

Increasing Clouds

Day: Increasing clouds, with a high near 34. South wind 5 to 10 mph.

Partly Cloudy

Night: Partly cloudy, with a low around 27. South wind 8 to 14 mph.

Wednesday Dec 17

Mostly Cloudy

Day: Mostly cloudy, with a high near 41. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.

Partly Cloudy

Night: Partly cloudy, with a low around 26. Southwest wind around 6 mph becoming south after midnight.

Thursday Dec 18

Rain

Day: A chance of rain after 1pm. Mostly cloudy, with a high near 50. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

Rain

Night: Rain. Low around 26. Chance of precipitation is 100%.

Friday Dec 19

Mostly Cloudy

Day: Mostly cloudy, with a high near 32.

Mostly Cloudy

Night: Mostly cloudy, with a low around 20.

Saturday Dec 20

Mostly Cloudy

Day: Mostly cloudy, with a high near 44.

Rain

Night: A chance of rain. Mostly cloudy, with a low around 32. Chance of precipitation is 30%.

Sunday Dec 21

Rain

Day: A chance of rain. Partly sunny, with a high near 42. Chance of precipitation is 30%.

Freezing Rain

Night: A chance of rain or freezing rain. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.

Monday Dec 22

Rain

Day: A chance of rain. Mostly cloudy, with a high near 42. Chance of precipitation is 30%.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.