Old Jefferson, LA
Full City Profile · Louisiana · East Baton Rouge Parish County
4.7
/5.0
A+
Excellent
7,790
Population
2,213/sq mi density
$85,466
Median Income
$57,224 per capita
$235,900
Home Value
$332,708 Zillow
$1,174
Median Rent
38.5% income on rent
69°F
Avg Temperature
A+
Overall
4.7 / 5.0
Strong
A
Economy
4.2 / 5.0
$85,466 median income, 5.1% unemployment
A+
Affordability
5.0 / 5.0
$235,900 home value, $1,174/mo rent
A+
Education
5.0 / 5.0
56.4% bachelor's degree or higher
Old Jefferson enjoys a temperate climate with an average annual temperature of 69°F (21°C). Winters average 52°F in January while summers reach 83°F in July. Annual precipitation totals 67.5 inches. The area receives 0.2 inches of snow annually. Air quality is rated Moderate with a median AQI of 51.
Temperature
52°F Jan (11°C)
83°F Jul (28°C)
| Annual Average | 68.5°F |
| 27% above US avg | |
| January Average | 52°F (11°C) |
| July Average | 83°F (28°C) |
Geography
| Elevation | 28 ft (9 m) |
| Area | 3.5 sq mi (9.1 km²) |
| Population Density | 2,213/sq mi |
| Coordinates | 30.3775°N, 91.0060°W |
| Timezone | America/Chicago |
| County | East Baton Rouge Parish County |
| Nearest Airport | Louis Armstrong New Orleans International (MSY) 52 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 51.0 |
| Rating | Moderate |
| Good Days % | 48.9% |
| Unhealthy Days | 7 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0413 ppm |
| NO₂ (Nitrogen Dioxide) | 7.3 ppb |
| SO₂ (Sulfur Dioxide) | 0.70 ppb |
| CO (Carbon Monoxide) | 0.14 ppm |
| PM2.5 (Fine Particles) | 9.4 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.0 / 100 |
| Social Vulnerability | 66.4 / 100 |
| Community Resilience | 59.6 / 100 |
Hazard Breakdown
| Tornado | Very High |
| Hurricane | Very High |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively High |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively High |
| Winter Weather | Relatively Moderate |
| Lightning | Very High |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 52°F (11°C) | 5.9 in | Coldest |
| February | 56°F (13°C) | 5.0 in | |
| March | 62°F (17°C) | 4.7 in | |
| April | 68°F (20°C) | 5.2 in | |
| May | 76°F (24°C) | 6.1 in | |
| June | 81°F (27°C) | 6.8 in | |
| July | 83°F (28°C) | 7.3 in | Warmest, Wettest |
| August | 83°F (28°C) | 7.0 in | |
| September | 79°F (26°C) | 4.9 in | |
| October | 70°F (21°C) | 5.0 in | |
| November | 59°F (15°C) | 4.2 in | Driest |
| December | 54°F (12°C) | 5.5 in |
Old Jefferson has a seasonal temperature swing of 31°F / from 52°F in January to 83°F in July. Total annual precipitation is 67.5 inches, with July being the wettest month (7.3") and November the driest (4.2").