Fairfield, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairfield, a community in Allen County, Tennessee.
Tonight
71°F
Mostly Clear
Mostly clear, with a low around 71. Northeast wind around 0 mph.
7-day forecast for Fairfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Mostly Clear | 0 mph | 9% |
| Saturday | 97°F | Patchy Fog then Sunny | 0 to 5 mph W | 11% |
| Saturday Night | 72°F | Partly Cloudy | 0 to 5 mph S | 7% |
| Sunday | 97°F | Mostly Sunny | 5 mph SW | 5% |
| Sunday Night | 72°F | Partly Cloudy | 0 to 5 mph SSW | 5% |
| Monday | 94°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph WSW | 22% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 5 mph ENE | 49% |
| Tuesday | 86°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 55% |
| Tuesday Night | 63°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 55% |
| Wednesday | 81°F | Chance Rain Showers | 5 mph N | 26% |
| Wednesday Night | 60°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 22% |
| Thursday | 79°F | Mostly Sunny | 5 mph N | 9% |
| Thursday Night | 59°F | Partly Cloudy | 0 to 5 mph NNE | 9% |
| Friday | 79°F | Mostly Sunny | 5 to 10 mph NNE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Fairfield (36.621, -86.342). Updated through the day.
Growing snapshot for Fairfield
Last spring frost
Apr 15
First fall frost
Oct 25
Growing season
194 days
Hardiness zone
7a
More local growing data for Fairfield: nearby ZIP 42120 weather · frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Scottsville, Ky (5.8 mi from Fairfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.