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
84°F
Mostly Sunny
Mostly sunny. High near 84, with temperatures falling to around 77 in the afternoon. South wind 5 to 10 mph.
7-day forecast for Old Jefferson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Mostly Sunny | 5 to 10 mph S | 12% |
| Tonight | 67°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph S | 17% |
| Wednesday | 80°F | Patchy Fog then Mostly Sunny | 5 mph NW | 16% |
| Wednesday Night | 56°F | Mostly Clear | 0 to 5 mph N | 1% |
| Thursday | 81°F | Sunny | 0 mph | 11% |
| Thursday Night | 59°F | Chance Rain Showers | 0 mph | 27% |
| Friday | 80°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph N | 21% |
| Friday Night | 54°F | Partly Cloudy | 5 mph N | 3% |
| Saturday | 74°F | Mostly Sunny | 5 mph N | 3% |
| Saturday Night | 49°F | Partly Cloudy | 5 mph N | 11% |
| Sunday | 69°F | Mostly Sunny | 5 mph N | 9% |
| Sunday Night | 45°F | Mostly Clear | 5 mph N | 4% |
| Monday | 71°F | Sunny | 5 mph N | 3% |
| Monday Night | 45°F | Mostly Clear | 0 mph | 2% |
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 Nov 3, 2026.