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Johnstown, Tennessee Weather Forecast
Johnstown, Tennessee Weather
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Weather Forecast for Johnstown, Tennessee : Coffee County
Issued: 12:31 am CST Dec 18, 2025 Latitude: 35.3473017 Longitude: -86.2011005 View on Google Maps

MouseOver for Detail Forecast
Overnight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Mostly Cloudy on Overnight 90% chance of rain on Thursday Sunny on Friday Sunny on Saturday 20% chance of rain on Sunday Mostly Sunny on Monday 20% chance of rain on Tuesday 20% chance of rain on Wednesday
Low: 41°F High: 59°F High: 45°F High: 57°F High: 52°F High: 54°F High: 58°F High: 63°F
Low: 31°F Low: 30°F Low: 39°F Low: 30°F Low: 41°F Low: 48°F  
Mostly Cloudy Rain Sunny Sunny Rain Mostly Sunny Rain Rain
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Current Conditions at
MADISON COUNTY EXEC - (KMDQ)
50°
Clear
as of 12:35 AM CST
Rel. Humidity: 49%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 30.03 in.
Flight Rule: VFR
Wind Data
7 MPH
140° Southeast
Cloud Level(s): Clear
Current Conditions at
SMYRNA - (KMQY)
37°
Clear
as of 11:56 PM CST
Rel. Humidity: 93%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.04 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
COLUMBIA - (KMRC)
43°
Partly Cloudy
as of 12:35 AM CST
Rel. Humidity: 86%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 11000ft
Mostly Cloudy on Overnight Overnight... Mostly cloudy, with a low around 41. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
90% chance of rain Thursday Thursday... Showers. High near 59. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
90% chance of thunderstorms Thursday Night Thursday Night... Showers and possibly a thunderstorm before 10pm, then a slight chance of showers between 10pm and 11pm. Low around 31. South wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunny on Friday Friday... Sunny, with a high near 45. Northwest wind 5 to 10 mph becoming light west northwest in the afternoon. Winds could gust as high as 20 mph.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 30. Calm wind becoming south southeast around 5 mph after midnight.
Sunny on Saturday Saturday... Sunny, with a high near 57. South wind 5 to 15 mph, with gusts as high as 25 mph.
30% chance of rain Saturday Night Saturday Night... A 30 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 39. South wind 5 to 10 mph becoming north northwest after midnight. Winds could gust as high as 20 mph.
20% chance of rain Sunday Sunday... A 20 percent chance of showers before noon. Mostly sunny, with a high near 52. North northeast wind 5 to 10 mph.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 30. North northeast wind around 5 mph becoming east after midnight.
Mostly Sunny on Monday Monday... Mostly sunny, with a high near 54.
20% chance of rain Monday Night Monday Night... A 20 percent chance of showers. Mostly cloudy, with a low around 41.
20% chance of rain Tuesday Tuesday... A 20 percent chance of showers. Mostly cloudy, with a high near 58.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 48.
20% chance of rain Wednesday Wednesday... A 20 percent chance of showers. Mostly cloudy, with a high near 63.
Current Radar Image


Sun Almanac for Johnstown, Tennessee
Sunrise: 06:48 AM
Sunset: 4:35 PM
Civil Sunrise:06:20 AM
Civil Sunset: 5:03 PM
Nautical Sunrise: 05:48 AM
Nautical Sunset: 5:35 PM
Astro Sunrise: 05:17 AM
Astro Sunset: 6:06 PM
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