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Bay St. Louis, MS
Full City Profile · Mississippi · Hancock County County
3.3
/5.0
B
Good
9,971
Population
679/sq mi density
$70,082
Median Income
$50,050 per capita
$231,900
Home Value
$207,541 Zillow
$1,138
Median Rent
30.6% income on rent
67°F
Avg Temperature
313 sunny days/yr
133
Violent Crime/100K
3,117 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$70,082 median income, 4.4% unemployment
A+
Affordability
4.8 / 5.0
$231,900 home value, $1,138/mo rent
F
Safety
1.0 / 5.0
133 violent crimes/100K
B+
Education
3.8 / 5.0
35.2% bachelor's degree or higher
Bay St. Louis enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 51°F in January while summers reach 81°F in July. The area gets 313 sunny days per year. Annual precipitation totals 65.0 inches. Air quality is rated Good with a median AQI of 43.
Temperature
51°F Jan (10°C)
81°F Jul (27°C)
| Annual Average | 67.0°F |
| 24% above US avg | |
| January Average | 51°F (10°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 313 days/yr |
Geography
| Elevation | 10 ft (3 m) |
| Area | 26.6 sq mi (68.9 km²) |
| Population Density | 679/sq mi |
| Coordinates | 30.3234°N, 89.3588°W |
| Timezone | America/Chicago |
| County | Hancock County County |
| Nearest Airport | Gulfport-Biloxi International (GPT) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0477 ppm |
| PM2.5 (Fine Particles) | 8.9 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 82.7 / 100 |
| Social Vulnerability | 74.7 / 100 |
| Community Resilience | 73.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Very Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 51°F (10°C) | 6.2 in | Coldest |
| February | 54°F (12°C) | 5.4 in | |
| March | 60°F (16°C) | 6.1 in | |
| April | 66°F (19°C) | 4.9 in | |
| May | 74°F (23°C) | 5.2 in | |
| June | 79°F (26°C) | 5.1 in | |
| July | 81°F (27°C) | 6.4 in | Warmest, Wettest |
| August | 81°F (27°C) | 6.1 in | |
| September | 78°F (26°C) | 6.0 in | |
| October | 69°F (20°C) | 3.0 in | Driest |
| November | 60°F (16°C) | 4.8 in | |
| December | 54°F (12°C) | 5.0 in |
Bay St. Louis has a seasonal temperature swing of 31°F / from 51°F in January to 81°F in July. Total annual precipitation is 64.1 inches, with July being the wettest month (6.4") and October the driest (3.0").