Gilliam, LA
Full City Profile · Louisiana · Bossier Parish County
4.2
/5.0
A
Great
113
Population
48/sq mi density
$65,000
Median Income
$39,912 per capita
$143,800
Home Value
$155,629 Zillow
65°F
Avg Temperature
A
Overall
4.2 / 5.0
Strong
B+
Economy
3.9 / 5.0
$65,000 median income, 4.9% unemployment
A+
Affordability
5.0 / 5.0
$143,800 home value, /mo rent
B+
Education
3.6 / 5.0
31.9% bachelor's degree or higher
Gilliam enjoys a temperate climate with an average annual temperature of 65°F (18°C). Winters average 46°F in January while summers reach 84°F in July. Annual precipitation totals 51.2 inches. The area receives 0.5 inches of snow annually. Air quality is rated Good with a median AQI of 47.
Temperature
46°F Jan (8°C)
84°F Jul (29°C)
| Annual Average | 65.3°F |
| 21% above US avg | |
| January Average | 46°F (8°C) |
| July Average | 84°F (29°C) |
Geography
| Elevation | 193 ft (59 m) |
| Area | 0.8 sq mi (2.0 km²) |
| Population Density | 48/sq mi |
| Coordinates | 32.8282°N, 93.8418°W |
| Timezone | America/Chicago |
| County | Bossier Parish County |
| Nearest Airport | Shreveport Regional (SHV) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 47.0 |
| Rating | Good |
| Good Days % | 57.4% |
| Unhealthy Days | 3 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0398 ppm |
| SO₂ (Sulfur Dioxide) | 0.64 ppb |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 82.5 / 100 |
| Social Vulnerability | 41.5 / 100 |
| Community Resilience | 35.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively High |
| Winter Weather | Relatively Low |
| Lightning | Relatively High |
| Ice Storm | Very High |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 46°F (8°C) | 4.3 in | Coldest |
| February | 50°F (10°C) | 4.5 in | |
| March | 57°F (14°C) | 5.2 in | Wettest |
| April | 65°F (18°C) | 4.5 in | |
| May | 73°F (23°C) | 4.7 in | |
| June | 80°F (27°C) | 4.6 in | |
| July | 84°F (29°C) | 3.2 in | Warmest |
| August | 83°F (28°C) | 3.1 in | Driest |
| September | 77°F (25°C) | 3.6 in | |
| October | 66°F (19°C) | 4.7 in | |
| November | 55°F (13°C) | 4.2 in | |
| December | 48°F (9°C) | 4.9 in |
Gilliam has a seasonal temperature swing of 38°F / from 46°F in January to 84°F in July. Total annual precipitation is 51.2 inches, with March being the wettest month (5.2") and August the driest (3.1").