Weather World
Town of Decatur, TennesseeDecatur, TN 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Decatur, TN Weather Forecast
Decatur, TN Weather Forecast Date: 658 AM EDT Mon Sep 21 2026
The area/counties/county of: Meigs, including the city of Big Spring.or toggle through each period.
Today... Mostly sunny. A slight chance of showers this morning, then a chance of showers and thunderstorms this afternoon. Highs in the lower 90s. Light winds. Chance of rain 50%.
Tonight... Mostly cloudy. A chance of thunderstorms in the evening. A chance of showers. A slight chance of thunderstorms after midnight. Lows in the upper 60s. Light winds. Chance of rain 40%.
Tuesday... Mostly sunny. A slight chance of showers and thunderstorms early in the afternoon. Showers likely with a chance of thunderstorms late. Humid with highs in the upper 80s. Temperature falling to around 80 in the afternoon. Light winds. Chance of rain 70%.
Tuesday Night... Partly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then mostly cloudy with showers likely with a slight chance of thunderstorms after midnight. Lows in the mid 60s. Light winds. Chance of rain 60%.
Wednesday... Showers likely with a slight chance of thunderstorms in the morning, then showers with a chance of thunderstorms in the afternoon. Highs in the lower 80s. Light winds. Chance of rain 80%.
Wednesday Night... Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the lower 60s. Chance of rain 40%.
Thursday... Mostly sunny. A chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 50%.
Thursday Night... Partly cloudy. A slight chance of showers in the evening. Lows in the upper 50s. Chance of rain 20%.
Friday... Mostly sunny. A slight chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 20%.
Friday Night... Partly cloudy in the evening, then clearing. Lows in the mid 50s.
Saturday... Sunny. Highs in the upper 70s.
Saturday Night... Partly cloudy. Lows in the mid 50s.
POP = Probability of Precipitation
Decatur Radar Loop
Use the map search tool if you want to place a location marker on the radar map...