What is today's weather forecast for Arnold, MO?

Today's forecast for Arnold shows a low of 34 degrees Fahrenheit. A chance of sprinkles with a slight chance of rain before 8pm, then a chance of sprinkles between 8pm and 9pm.

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

The 7-day forecast for Arnold shows highs from 32 to 45 degrees and lows from 20 to 34 degrees Fahrenheit. Expect precipitation on 5 days with chances of 20% or higher.

Will it rain in Arnold, MO this week?

Yes, rain is possible in Arnold this week. Precipitation chances: Tuesday (20% chance), Friday (60% chance), Saturday (80% chance), Sunday (20% chance), Monday (20% chance).

How accurate is the Arnold weather forecast?

WeatherForYou provides highly accurate Arnold 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.

Arnold, MO Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

58°F
Feels Like 58°F

Humidity 78% Dew Point 51°F Wind WNW 3 MPH Gusts 6 Barometer 29.87 in.

Solar Rad 27 w/m²

Report from a personal weather station 1 mi. W of central Arnold
at 4:05 PM Tue, Nov 25, 2025

Point Forecast at a Glance

TueNov 25

20%

WedNov 26

ThuNov 27

FriNov 28

SatNov 29

80%

SunNov 30

20%

MonDec 1

20%

7-Day Temperature Trend

Week Ahead Summary

Cooling trend continues with high temperatures dropping from 45°F to 32°F. Unsettled weather expected with wintry mix likely on at least 5 days.

Climate Context

This week's forecast shows temperatures running 11°F below the historical average for November-December. Normal highs for this period are around 50°F with lows around 32°F.

This Date in Weather History

1950 - A great storm hit the Northern and Central Appalachians with snow and high winds. Winds reached hurricane force along eastern slopes of the Appalachians, with gusts to 100 mph at Hartford CT, 110 mph at Concord NH, and 160 mph at Mount Washington NH. Heavy rain also hit the eastern slopes, with eight inches reported at Slide Mountain NY. The western slopes were buried under heavy snow. The storm produced record snowfall totals of 27.7 inches at Pittsburgh PA, and 36.3 inches at Steubenville OH. The snow, and record cold temperatures, resulted in 160 deaths.

Arnold, MO 7 Day Weather Forecast Details

Tuesday Nov 25

Night: A chance of sprinkles with a slight chance of rain before 8pm, then a chance of sprinkles between 8pm and 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 34. West wind 8 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.

Wednesday Nov 26

Day: Mostly sunny, with a high near 45. West wind 11 to 18 mph, with gusts as high as 33 mph.

Night: Partly cloudy, with a low around 27. West wind 6 to 9 mph, with gusts as high as 21 mph.

Thursday Nov 27

Day: Sunny, with a high near 44. Northwest wind 6 to 8 mph.

Night: Mostly clear, with a low around 23. Northwest wind around 5 mph becoming calm in the evening.

Friday Nov 28

Day: Mostly sunny, with a high near 41.

Night: A slight chance of snow before midnight, then rain and snow likely. Cloudy, with a low around 30. Chance of precipitation is 60%.

Saturday Nov 29

Day: Rain and snow, becoming all rain after noon. High near 41. Chance of precipitation is 80%.

Night: Rain likely, mainly before midnight. Cloudy, with a low around 28. Chance of precipitation is 70%.

Sunday Nov 30

Day: A 20 percent chance of rain. Mostly cloudy, with a high near 35.

Night: A slight chance of rain and snow. Mostly cloudy, with a low around 20. Chance of precipitation is 20%.

Monday Dec 1

Day: A slight chance of rain and snow. Mostly cloudy, with a high near 32. Chance of precipitation is 20%.

Night: A 20 percent chance of snow. Mostly cloudy, with a low around 21.

Tuesday Dec 2

Day: Partly sunny, with a high near 34.

About Arnold, MO

Arnold is a city in northeastern Jefferson County, Missouri, situated near the confluence of the Meramec and Mississippi rivers. A suburb of St. Louis, the city lies within the Greater St. Louis metropolitan statistical area. The population was 20,858 at the 2020 United States census, which makes it the most populous community in the county.

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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