Johnson City, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Johnson City, a city in Washington County, Tennessee.
Overnight
66°F
Areas Of Fog
Areas of fog. Partly cloudy, with a low around 66. Wind around 0 mph.
7-day forecast for Johnson City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Areas Of Fog | 0 mph | 2% |
| Saturday | 90°F | Areas Of Fog then Slight Chance Showers And Thunderstorms | 0 mph | 20% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph E | 22% |
| Sunday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph S | 27% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 42% |
| Monday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 51% |
| Monday Night | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph E | 61% |
| Tuesday | 83°F | Showers And Thunderstorms | 0 to 5 mph S | 86% |
| Tuesday Night | 61°F | Showers And Thunderstorms | 5 mph SE | 86% |
| Wednesday | 76°F | Showers And Thunderstorms Likely | 5 mph SE | 65% |
| Wednesday Night | 58°F | Showers And Thunderstorms Likely | 0 to 10 mph SE | 65% |
| Thursday | 77°F | Chance Rain Showers | 0 to 5 mph NE | 40% |
| Thursday Night | 56°F | Chance Showers And Thunderstorms | 0 to 5 mph NE | 39% |
| Friday | 75°F | Slight Chance Rain Showers | 0 to 5 mph N | 21% |
Forecast source: National Weather Service (api.weather.gov) for Johnson City (36.342, -82.381). Updated through the day.
Growing snapshot for Johnson City
Last spring frost
Apr 19
First fall frost
Oct 24
Growing season
187 days
Hardiness zone
7b
More local growing data for Johnson City: nearby ZIP 37604 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Elizabethton, Tn (8.4 mi from Johnson City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.