Weather World
Grundy County, TN Official WebsiteGrundy County, TN 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Grundy County, TN Weather Forecast
Grundy County, TN Weather Forecast Date: 133 AM CDT Mon Aug 24 2026
The area/counties/county of: Grundy, including the cities of: Altamont and Coalmont.or toggle through each period.
Today... Sunny. Highs in the lower 80s. North winds around 5 mph.
Tonight... Partly cloudy in the evening, then becoming mostly clear. Lows in the lower 60s. Northeast winds around 5 mph in the evening, becoming light and variable.
Tuesday... Sunny. Highs in the mid 80s. Light and variable winds, becoming north around 5 mph in the afternoon.
Tuesday Night... Mostly clear. Lows in the mid 60s. Light and variable winds.
Wednesday... Mostly sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. South winds around 5 mph, becoming southwest in the afternoon. Chance of rain 30%.
Wednesday Night... Mostly cloudy with a 40% chance of showers. Lows in the upper 60s.
Thursday... Mostly sunny. A chance of showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 60%.
Thursday Night... Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening. Lows in the mid 60s. Chance of rain 50%.
Friday... Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 20%.
Friday Night... Mostly clear. Lows in the mid 60s.
Saturday... Sunny. Highs in the mid 80s.
Saturday Night... Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 60s.
POP = Probability of Precipitation
Grundy County Radar Loop
Use the map search tool if you want to place a location marker on the radar map...