Blaine, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blaine, a city in Grainger County, Tennessee.
Today
88°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2pm. Mostly sunny. High near 88, with temperatures falling to around 85 in the afternoon. Heat index values as high as 95. Northeast wind around 0 mph. Chance of precipitation is 30%.
7-day forecast for Blaine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 32% |
| Tonight | 69°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 mph | 26% |
| Wednesday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 mph | 53% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 0 mph | 53% |
| Thursday | 86°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 52% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms then Mostly Cloudy | 0 to 5 mph S | 52% |
| Friday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 37% |
| Friday Night | 69°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 37% |
| Saturday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 50% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 0 mph | 50% |
| Sunday | 87°F | Chance Showers And Thunderstorms | 0 mph | 36% |
| Sunday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 36% |
| Monday | 88°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 mph | 34% |
| Monday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 34% |
Forecast source: National Weather Service (api.weather.gov) for Blaine (36.145, -83.696). Updated through the day.
Growing snapshot for Blaine
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
175 days
Hardiness zone
7b
More local growing data for Blaine: nearby ZIP 37709 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Jefferson City, Tn (11.1 mi from Blaine). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.