National Weather Service United States Department of Commerce

Unseasonably cold temperatures spreading into central U.S.

A strong cold front will usher a much colder air mass into the central and eastern U.S. for the end of the work week. Temperatures will be 10 to 20 degrees below average in some areas. Rain and snow will be possible across the Great Lakes on Friday as the system crosses the area. Heavy snow is possible in the central Appalachians Friday night.
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Current Conditions

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Arnold MO

7 Day Forecast

For More Weather Information:

Saint Louis, MO Local Forecast Office

Overnight

Mostly Cloudy

Mostly
Cloudy

Low: 46 °F

Friday

Breezy

Breezy

High: 45 °F

Friday
Night

Frost

Frost

Low: 27 °F

Saturday

Morning Frost

Morning
Frost

High: 46 °F

Saturday
Night

Mostly Clear

Mostly
Clear

Low: 29 °F

Sunday

Mostly Sunny

Mostly
Sunny

High: 52 °F

Sunday
Night

Partly Cloudy

Partly
Cloudy

Low: 39 °F

Monday

Mostly Sunny

Mostly
Sunny

High: 64 °F

Monday
Night

Chance Showers Chance for Measurable Precipitation 40%

Chance
Showers

Low: 50 °F

Detailed Forecast

  • Overnight Mostly cloudy, with a steady temperature around 46. Northwest wind 5 to 7 mph.
  • Friday Partly sunny, then gradually becoming sunny, with a high near 45. Breezy, with a north wind 16 to 24 mph, with gusts as high as 34 mph.
  • Friday Night Widespread frost after 10pm. Otherwise, clear, with a low around 27. North wind 9 to 16 mph.
  • Saturday Widespread frost before 10am. Otherwise, sunny, with a high near 46. North wind 5 to 8 mph.
  • Saturday Night Mostly clear, with a low around 29. Light and variable wind becoming southeast around 5 mph after midnight.
  • Sunday Mostly sunny, with a high near 52.
  • Sunday Night Partly cloudy, with a low around 39.
  • Monday Mostly sunny, with a high near 64.
  • Monday Night A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 50.
  • Tuesday Showers likely and possibly a thunderstorm. Cloudy, with a high near 60. Chance of precipitation is 70%.
  • Tuesday Night Showers likely and possibly a thunderstorm. Cloudy, with a low around 49. Chance of precipitation is 60%.
  • Wednesday A chance of showers. Mostly cloudy, with a high near 58. Chance of precipitation is 40%.
  • Wednesday Night Partly cloudy, with a low around 44.
  • Thursday Sunny, with a high near 61.