What is today's weather forecast for Saint Clair, PA?

Today's forecast for Saint Clair shows a low of 20 degrees Fahrenheit. Partly cloudy, with a low around 20.

What is the 7-day weather forecast for Saint Clair, PA?

The 7-day forecast for Saint Clair shows highs from 26 to 50 degrees and lows from 14 to 30 degrees Fahrenheit. Expect precipitation on 2 days with chances of 20% or higher.

Will it rain in Saint Clair, PA this week?

Yes, rain is possible in Saint Clair this week. Precipitation chances: Saturday (70% chance), Thursday (30% chance).

How accurate is the Saint Clair weather forecast?

WeatherForYou provides highly accurate Saint Clair forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Saint Clair, PA Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

25°F
Feels Like 25°F

Humidity 70% Dew Point 17°F Wind Calm Barometer 29.93 in.

Report from a MADIS/MESONET weather station 2.5 mi. SSE of central Saint Clair
at 2:15 AM Fri, Dec 12, 2025

Point Forecast at a Glance

ThuDec 11

FriDec 12

SatDec 13

SunDec 14

MonDec 15

TueDec 16

WedDec 17

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

Variable high temperatures through the week, ranging from 26°F to 41°F. Mostly dry conditions with only one day showing snow chances.

Climate Context

This week's forecast shows temperatures running 6°F below the historical average for December. Normal highs for this period are around 41°F with lows around 25°F.

This Date in Weather History

1988 - Arctic cold invaded the central and eastern U.S. Sault Ste Marie MI reported a record low of 14 degrees below zero, and International Falls MN was the cold spot in the nation with a low of 25 degrees below zero. Temperatures remained below zero all day over parts of eastern Upper Michigan and northern New England.

Saint Clair, PA 7 Day Weather Forecast Details

Thursday Dec 11

Night: Partly cloudy, with a low around 20. West wind around 5 mph.

Friday Dec 12

Day: Sunny, with a high near 33. Northwest wind around 6 mph becoming calm in the afternoon.

Night: Increasing clouds, with a low around 18. Calm wind.

Saturday Dec 13

Day: Mostly cloudy, with a high near 37. Calm wind becoming southwest around 6 mph in the afternoon.

Night: Snow showers likely. Cloudy, with a low around 21. Light northwest wind. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

Sunday Dec 14

Day: Partly sunny, with a high near 26.

Night: Partly cloudy, with a low around 14.

Monday Dec 15

Day: Partly sunny, with a high near 28.

Night: Mostly cloudy, with a low around 17.

Tuesday Dec 16

Day: Mostly sunny, with a high near 31.

Night: Mostly cloudy, with a low around 21.

Wednesday Dec 17

Day: Mostly cloudy, with a high near 41.

Night: Mostly cloudy, with a low around 30.

Thursday Dec 18

Day: A chance of showers. Mostly cloudy, with a high near 50. 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.

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