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Williston, MD
Full City Profile · Maryland · Caroline County County
3.4
/5.0
B
Good
302
Population
1,162/sq mi density
$106,389
Median Income
$39,414 per capita
$455,600
Home Value
$354,563 Zillow
55°F
Avg Temperature
293 sunny days/yr
161
Violent Crime/100K
5,636 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$106,389 median income, 0.0% unemployment
A
Affordability
4.3 / 5.0
$455,600 home value, /mo rent
F
Safety
1.0 / 5.0
161 violent crimes/100K
B
Education
3.4 / 5.0
30.2% bachelor's degree or higher
Williston experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 35°F in January while summers reach 77°F in July. The area gets 293 sunny days per year. Annual precipitation totals 46.3 inches. The area receives 12.8 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
35°F Jan (1°C)
77°F Jul (25°C)
| Annual Average | 55.4°F |
| 3% above US avg | |
| January Average | 35°F (1°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 25 ft (8 m) |
| Area | 0.3 sq mi (0.7 km²) |
| Population Density | 1,162/sq mi |
| Coordinates | 38.8303°N, 75.8515°W |
| Timezone | America/New_York |
| County | Caroline County County |
| Nearest Airport | Cambridge-Dorchester Regional (CGE) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 45.7 / 100 |
| Social Vulnerability | 58.7 / 100 |
| Community Resilience | 56.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | — | — | 122 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 35°F (1°C) | 3.8 in | Coldest |
| February | 36°F (2°C) | 3.0 in | Driest |
| March | 45°F (7°C) | 4.2 in | |
| April | 54°F (12°C) | 3.4 in | |
| May | 64°F (18°C) | 4.0 in | |
| June | 72°F (22°C) | 3.5 in | |
| July | 77°F (25°C) | 4.3 in | Warmest, Wettest |
| August | 75°F (24°C) | 4.2 in | |
| September | 69°F (21°C) | 3.7 in | |
| October | 58°F (14°C) | 3.2 in | |
| November | 48°F (9°C) | 3.3 in | |
| December | 39°F (4°C) | 3.4 in |
Williston has a seasonal temperature swing of 42°F / from 35°F in January to 77°F in July. Total annual precipitation is 44.1 inches, with July being the wettest month (4.3") and February the driest (3.0").