Union, MS Weather & Growing Conditions
Today
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 104. North northwest wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 0 to 5 mph NNW | 4% |
| Tonight | 73°F | Partly Cloudy | 0 to 5 mph SSW | 10% |
| Sunday | 98°F | Sunny | 0 to 5 mph NNW | 7% |
| Sunday Night | 72°F | Mostly Clear | 0 mph | 6% |
| Monday | 97°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NNW | 16% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 0 mph | 22% |
| Tuesday | 95°F | Sunny | 0 to 5 mph NNE | 13% |
| Tuesday Night | 69°F | Mostly Clear | 0 to 5 mph NNE | 13% |
| Wednesday | 92°F | Sunny | 5 to 10 mph NNE | 8% |
| Wednesday Night | 66°F | Mostly Clear | 5 to 10 mph NNE | 8% |
| Thursday | 88°F | Sunny | 5 to 10 mph NNE | 5% |
| Thursday Night | 64°F | Mostly Clear | 5 to 10 mph NNE | 5% |
| Friday | 87°F | Mostly Sunny | 5 to 10 mph NNE | 2% |
| Friday Night | 63°F | Partly Cloudy | 5 to 10 mph NNE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Union, MS
Last spring frost
Mar 20
First fall frost
Nov 9
Growing season
235 days
Hardiness zone
8b
Explore more for Union, MS: full frost dates · planting calendar · Mississippi frost dates
Climate data from the nearest NOAA station, Philadelphia 1 Wsw, Ms (11.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.