Portland, TN Weather & Growing Conditions
Today
87°F
Sunny
Sunny, with a high near 87. North northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 5 mph NNE | 2% |
| Tonight | 69°F | Mostly Clear then Patchy Fog | 0 to 5 mph N | 2% |
| Wednesday | 88°F | Patchy Fog then Slight Chance Showers And Thunderstorms | 0 mph | 22% |
| Wednesday Night | 70°F | Patchy Fog then Partly Cloudy | 0 to 5 mph S | 7% |
| Thursday | 90°F | Sunny then Slight Chance Showers And Thunderstorms | 5 mph SSW | 17% |
| Thursday Night | 72°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph S | 27% |
| Friday | 90°F | Chance Showers And Thunderstorms | 5 mph SSW | 35% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 5 mph S | 35% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 5 mph SSW | 46% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 46% |
| Sunday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SSW | 34% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 34% |
| Monday | 90°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph SSW | 18% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SSW | 18% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portland, TN
Last spring frost
Apr 5
First fall frost
Nov 1
Growing season
210 days
Hardiness zone
7b
Explore more for Portland, TN: full frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Portland Sewage Plt, Tn (1.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.