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
Partly Cloudy
Partly cloudy, with a low around 66. Wind around 0 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Johnson City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Partly Cloudy | 0 mph | 5% |
| Saturday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 mph | 20% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 31% |
| Sunday | 88°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 58% |
| Sunday Night | 65°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 58% |
| Monday | 89°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph SW | 57% |
| Monday Night | 65°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SE | 57% |
| Tuesday | 84°F | Showers And Thunderstorms | 0 to 5 mph S | 81% |
| Tuesday Night | 62°F | Showers And Thunderstorms | 5 mph SE | 81% |
| Wednesday | 78°F | Showers And Thunderstorms Likely | 5 mph SE | 59% |
| Wednesday Night | 59°F | Showers And Thunderstorms Likely | 5 to 10 mph E | 59% |
| Thursday | 76°F | Chance Rain Showers | 0 to 5 mph N | 32% |
| Thursday Night | 56°F | Chance Rain Showers then Mostly Cloudy | 0 to 5 mph NE | 29% |
| Friday | 77°F | Partly Sunny then 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.