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

Today's forecast for Saint Clair shows a high of 44 degrees and a low of 27 degrees Fahrenheit. Sunny, with a high near 44.

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

The 7-day forecast for Saint Clair shows highs from 42 to 58 degrees and lows from 20 to 45 degrees Fahrenheit. Expect precipitation on 2 days with chances of 20% or higher.

Will it rain in Saint Clair, MO this week?

Yes, rain is possible in Saint Clair this week. Precipitation chances: Wednesday (30% chance), Thursday (50% 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, MO Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

42°F
Feels Like 38°F

Humidity 28% Dew Point 11°F Wind SSW 6 MPH Gusts 8 Barometer 30.26 in.

Solar Rad 145 w/m² UV Index 1

Report from a personal weather station 2.9 mi. SE of central Saint Clair
at 1:10 PM Mon, Dec 15, 2025

Point Forecast at a Glance

MonDec 15

TueDec 16

WedDec 17

ThuDec 18

50%

FriDec 19

SatDec 20

SunDec 21

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

Significant warming trend with high temperatures climbing from 44°F to 49°F, reaching a high of 58°F. Some rain possible with at least 2 days showing precipitation chances of 20% or higher.

Climate Context

This week's forecast shows temperatures running 7°F above the historical average for December. Normal highs for this period are around 44°F with lows around 25°F.

This Date in Weather History

1901 - An intense cold front swept across the eastern U.S. The cold front produced heavy rain in Louisiana, and heavy snow in the northeastern U.S.

Saint Clair, MO 7 Day Weather Forecast Details

Monday Dec 15

Day: Sunny, with a high near 44. Southwest wind 7 to 13 mph, with gusts as high as 28 mph.

Night: Partly cloudy, with a low around 27. Southwest wind around 6 mph.

Tuesday Dec 16

Day: Sunny, with a high near 54. Southwest wind 6 to 9 mph.

Night: Mostly cloudy, with a low around 33. South wind around 6 mph becoming calm after midnight.

Wednesday Dec 17

Day: Sunny, with a high near 55. Calm wind becoming south around 6 mph in the afternoon.

Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 45.

Thursday Dec 18

Day: A 50 percent chance of rain before noon. Partly sunny, with a high near 55.

Night: Partly cloudy, with a low around 20.

Friday Dec 19

Day: Sunny, with a high near 42.

Night: Partly cloudy, with a low around 33.

Saturday Dec 20

Day: Mostly sunny, with a high near 58.

Night: Partly cloudy, with a low around 31.

Sunday Dec 21

Day: Mostly sunny, with a high near 49.

About Saint Clair, MO

St. Clair is a city in Franklin County, Missouri, United States. The population was 4,791 at the 2020 census.

Content from Wikipedia, licensed under CC BY-SA 3.0.

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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