Erwin, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Erwin, a town in Unicoi County, Tennessee.
Today
85°F
Mostly Sunny then Showers And Thunderstorms Likely
Showers and thunderstorms likely after noon. Mostly sunny. High near 85, with temperatures falling to around 80 in the afternoon. Southeast wind around 0 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Erwin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 mph | 67% |
| Tonight | 66°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 42% |
| Wednesday | 84°F | Chance Showers And Thunderstorms | 0 mph | 85% |
| Wednesday Night | 67°F | Showers And Thunderstorms Likely | 0 mph | 57% |
| Thursday | 85°F | Showers And Thunderstorms | 0 to 5 mph SW | 83% |
| Thursday Night | 66°F | Showers And Thunderstorms then Mostly Cloudy | 0 mph | 83% |
| Friday | 86°F | Chance Showers And Thunderstorms | 0 mph | 74% |
| Friday Night | 66°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 mph | 74% |
| Saturday | 85°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 78% |
| Saturday Night | 67°F | Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 0 mph | 78% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 53% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 0 mph | 53% |
| Monday | 86°F | Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 5 mph SW | 47% |
| Monday Night | 68°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 47% |
Forecast source: National Weather Service (api.weather.gov) for Erwin (36.146, -82.412). Updated through the day.
Growing snapshot for Erwin
Last spring frost
Apr 21
First fall frost
Oct 23
Growing season
183 days
Hardiness zone
7a
More local growing data for Erwin: nearby ZIP 37650 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Erwin 1 W, Tn (4.4 mi from Erwin). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.