Myrtle, MS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Myrtle, a town in Union County, Mississippi.
This Afternoon
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 104. North northeast wind around 0 mph.
7-day forecast for Myrtle
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Sunny | 0 mph | 1% |
| Tonight | 73°F | Clear | 0 mph | 1% |
| Saturday | 99°F | Sunny | 0 to 5 mph NW | 2% |
| Saturday Night | 73°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 98°F | Sunny | 0 to 5 mph WSW | 1% |
| Sunday Night | 72°F | Mostly Clear | 0 mph | 1% |
| Monday | 97°F | Mostly Sunny | 0 to 5 mph WSW | 11% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph ENE | 19% |
| Tuesday | 93°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph N | 18% |
| Tuesday Night | 66°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph N | 18% |
| Wednesday | 87°F | Mostly Sunny | 5 to 10 mph N | 11% |
| Wednesday Night | 63°F | Mostly Clear | 5 to 10 mph NNE | 11% |
| Thursday | 86°F | Sunny | 5 to 10 mph NNE | 4% |
| Thursday Night | 62°F | Partly Cloudy | 5 to 10 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Myrtle (34.561, -89.118). Updated through the day.
Growing snapshot for Myrtle
Last spring frost
Apr 8
First fall frost
Oct 28
Growing season
202 days
Hardiness zone
8a
More local growing data for Myrtle: nearby ZIP 38650 weather · frost dates · planting calendar · Mississippi frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hickory Flat, Ms (6.6 mi from Myrtle). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.