Old Jefferson, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Old Jefferson, a community in East Baton Rouge County, Louisiana.
This Afternoon
93°F
Sunny
Sunny. High near 93, with temperatures falling to around 90 in the afternoon. East wind around 5 mph.
7-day forecast for Old Jefferson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 93°F | Sunny | 5 mph E | 0% |
| Tonight | 72°F | Clear | 0 to 5 mph SE | 0% |
| Saturday | 95°F | Sunny | 0 to 5 mph NE | 2% |
| Saturday Night | 74°F | Clear | 0 to 5 mph S | 1% |
| Sunday | 95°F | Sunny | 0 to 5 mph NE | 3% |
| Sunday Night | 76°F | Mostly Clear | 0 mph | 3% |
| Monday | 95°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph NE | 30% |
| Monday Night | 75°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 30% |
| Tuesday | 95°F | Sunny | 0 to 5 mph NE | 13% |
| Tuesday Night | 75°F | Mostly Clear | 0 mph | 13% |
| Wednesday | 94°F | Sunny | 0 to 5 mph NE | 9% |
| Wednesday Night | 74°F | Mostly Clear | 0 to 5 mph NE | 9% |
| Thursday | 92°F | Sunny | 5 to 10 mph NE | 7% |
| Thursday Night | 72°F | Mostly Clear | 5 mph NE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Old Jefferson (30.378, -91.006). Updated through the day.
Growing snapshot for Old Jefferson
Last spring frost
Feb 28
First fall frost
Nov 26
Growing season
272 days
Hardiness zone
9a
More local growing data for Old Jefferson: nearby ZIP 70817 weather · frost dates · planting calendar · Louisiana frost dates
Nearby towns & communities
Baker
Baton Rouge
Brownfields
Central
Denham Springs
Gardere
Inniswold
Merrydale
Monticello
Oak Hills Place
Port Allen
Shenandoah
Village St. George
Westminster
Zachary
Climate data from the nearest NOAA station, Lsu Ben-Hur Farm, La (11.2 mi from Old Jefferson). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.