Hattiesburg, MS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hattiesburg, a city in Forrest County, Mississippi.
Tonight
73°F
Mostly Clear
Mostly clear, with a low around 73. Heat index values as high as 100. Southwest wind 0 to 5 mph.
7-day forecast for Hattiesburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 73°F | Mostly Clear | 0 to 5 mph SW | 2% |
| Sunday | 98°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 17% |
| Sunday Night | 73°F | Mostly Clear | 0 to 5 mph SW | 12% |
| Monday | 97°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NNE | 23% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph NNE | 23% |
| Tuesday | 97°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NNE | 15% |
| Tuesday Night | 72°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph NE | 15% |
| Wednesday | 95°F | Sunny | 0 to 10 mph NNE | 4% |
| Wednesday Night | 70°F | Mostly Clear | 0 to 5 mph NE | 4% |
| Thursday | 93°F | Sunny | 5 to 10 mph NNE | 1% |
| Thursday Night | 68°F | Mostly Clear | 0 to 5 mph NNE | 1% |
| Friday | 91°F | Sunny | 5 to 10 mph NNE | 2% |
| Friday Night | 67°F | Partly Cloudy | 0 to 5 mph NNE | 2% |
| Saturday | 91°F | Sunny | 5 to 10 mph NNE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Hattiesburg (31.307, -89.317). Updated through the day.
Growing snapshot for Hattiesburg
Last spring frost
Mar 7
First fall frost
Nov 23
Growing season
261 days
Hardiness zone
8b
More local growing data for Hattiesburg: nearby ZIP 39406 weather · frost dates · planting calendar · Mississippi frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hattiesburg 5Sw, Ms (5.1 mi from Hattiesburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.