Erwin, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Erwin, a town in Unicoi County, Tennessee.
This Afternoon
75°F
Sunny
Sunny. High near 75, with temperatures falling to around 71 in the afternoon. Southeast wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Erwin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 10 mph SE | 1% |
| Tonight | 59°F | Partly Cloudy | 5 to 10 mph SE | 4% |
| Wednesday | 71°F | Showers And Thunderstorms | 10 to 15 mph SE | 77% |
| Wednesday Night | 62°F | Showers And Thunderstorms | 0 to 10 mph S | 92% |
| Thursday | 74°F | Chance Rain Showers | 0 to 5 mph SW | 30% |
| Thursday Night | 56°F | Chance Rain Showers | 0 mph | 30% |
| Friday | 69°F | Chance Rain Showers | 0 to 5 mph NW | 29% |
| Friday Night | 48°F | Partly Cloudy | 0 mph | 11% |
| Saturday | 62°F | Mostly Sunny | 0 to 5 mph NW | 11% |
| Saturday Night | 41°F | Partly Cloudy | 0 mph | 5% |
| Sunday | 62°F | Mostly Sunny | 0 to 5 mph NW | 5% |
| Sunday Night | 38°F | Mostly Clear | 0 mph | 14% |
| Monday | 61°F | Slight Chance Rain Showers | 0 to 5 mph W | 18% |
| Monday Night | 39°F | Slight Chance Rain Showers then Mostly Clear | 0 mph | 18% |
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 Nov 4, 2026.