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Harwell, Tennessee Weather Forecast
Harwell, Tennessee Weather
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Weather Forecast for Harwell, Tennessee : Giles County
Issued: 12:31 am CST Dec 18, 2025 Latitude: 35.118137 Longitude: -87.0058407 View on Google Maps

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Overnight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
20% chance of rain on Overnight 90% chance of rain on Thursday Sunny on Friday Sunny on Saturday 20% chance of rain on Sunday 20% chance of rain on Monday 20% chance of rain on Tuesday Mostly Cloudy on Wednesday
Low: 42°F High: 60°F High: 47°F High: 58°F High: 53°F High: 55°F High: 61°F High: 66°F
Low: 31°F Low: 30°F Low: 40°F Low: 31°F Low: 43°F Low: 49°F  
Rain Rain Sunny Sunny Rain Rain Rain Mostly Cloudy
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Current Conditions at
MADISON COUNTY EXEC - (KMDQ)
52°
Clear
as of 1:55 AM CST
Rel. Humidity: 53%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
8 MPH
140° Southeast
Cloud Level(s): Clear
Current Conditions at
COLUMBIA - (KMRC)
52°
Mostly Cloudy
as of 1:50 AM CST
Rel. Humidity: 46%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 29.95 in.
Flight Rule: VFR
Wind Data
5 MPH
Gust: 12 MPH
160° South
Cloud Level(s): Broken at 12000ft
Current Conditions at
DECATUR - (KDCU)
46°
Clear
as of 1:53 AM CST
Rel. Humidity: 65%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
5 MPH
150° Southeast
Cloud Level(s): Clear
Current Conditions at
HUNTSVILLE - (KHSV)
45°
Clear
as of 1:53 AM CST
Rel. Humidity: 65%
Dew Point: 34°F
Visibility: 10 Miles
Pressure: 30.01 in.
Flight Rule: VFR
Wind Data
3 MPH
140° Southeast
Cloud Level(s): Clear
20% chance of rain Overnight Overnight... A 20 percent chance of showers after 5am. Mostly cloudy, with a low around 42. South southeast wind around 5 mph.
90% chance of rain Thursday Thursday... Showers. High near 60. South southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
80% chance of thunderstorms Thursday Night Thursday Night... Showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Low around 31. South southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunny on Friday Friday... Sunny, with a high near 47. Northwest wind around 5 mph becoming calm in the afternoon.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 30. Calm wind becoming south around 5 mph.
Sunny on Saturday Saturday... Sunny, with a high near 58. South wind 5 to 10 mph, with gusts as high as 20 mph.
30% chance of rain Saturday Night Saturday Night... A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 40. South wind around 5 mph becoming calm in the evening. Winds could gust as high as 20 mph.
20% chance of rain Sunday Sunday... A 20 percent chance of showers. Mostly sunny, with a high near 53. North northeast wind around 5 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 31. North northeast wind around 5 mph becoming calm in the evening.
20% chance of rain Monday Monday... A 20 percent chance of showers after noon. Mostly sunny, with a high near 55.
20% chance of rain Monday Night Monday Night... A 20 percent chance of showers. Mostly cloudy, with a low around 43.
20% chance of rain Tuesday Tuesday... A 20 percent chance of showers. Mostly cloudy, with a high near 61.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 49.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 66.
Current Radar Image


Sun Almanac for Harwell, Tennessee
Sunrise: 06:51 AM
Sunset: 4:39 PM
Civil Sunrise:06:23 AM
Civil Sunset: 5:07 PM
Nautical Sunrise: 05:51 AM
Nautical Sunset: 5:39 PM
Astro Sunrise: 05:20 AM
Astro Sunset: 6:09 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.