| National Weather Service Forecast for:
Watertown TN Issued by: National Weather Service Nashville, TN |
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| Updated: 4:46 am CDT Jul 18, 2026 | ||||||||||||||||||
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| Overnight |
A 20 percent chance of showers and thunderstorms. Patchy fog. Otherwise, partly cloudy, with a low around 71. Calm wind. |
| Saturday |
A 30 percent chance of showers and thunderstorms, mainly between 1pm and 2pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 90. Heat index values as high as 101. Calm wind becoming west northwest around 5 mph in the afternoon. |
| Saturday Night |
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. West wind around 5 mph becoming calm. Chance of precipitation is 30%. |
| Sunday |
Showers and thunderstorms likely, mainly between 1pm and 5pm. Mostly sunny, with a high near 90. Heat index values as high as 100. Calm wind becoming west northwest around 5 mph in the afternoon. Chance of precipitation is 60%. |
| Sunday Night |
Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and 1am. Patchy fog after 1am. Otherwise, partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 60%. |
| Monday |
A 30 percent chance of showers and thunderstorms after 1pm. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 90. Calm wind becoming west around 5 mph. |
| Monday Night |
Partly cloudy, with a low around 73. Calm wind becoming south around 5 mph. |
| Tuesday |
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92. Southwest wind 5 to 10 mph. |
| Tuesday Night |
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. Southwest wind around 5 mph becoming northwest after midnight. Chance of precipitation is 60%. |
| Wednesday |
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. |
| Wednesday Night |
Mostly clear, with a low around 63. |
| Thursday |
Sunny, with a high near 82. |
| Thursday Night |
Partly cloudy, with a low around 64. |
| Friday |
Mostly sunny, with a high near 85. |
Forecast from NOAA-NWS for Watertown TN.





