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Sister Bay, WI
Full City Profile · Wisconsin · Door County County
3.2
/5.0
B
Good
1,016
Population
381/sq mi density
$57,679
Median Income
$47,490 per capita
$328,700
Home Value
$497,405 Zillow
$1,018
Median Rent
40.4% income on rent
45°F
Avg Temperature
270 sunny days/yr
33
Violent Crime/100K
1,420 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.4 / 5.0
$57,679 median income, 1.2% unemployment
B
Affordability
3.5 / 5.0
$328,700 home value, $1,018/mo rent
F
Safety
1.0 / 5.0
33 violent crimes/100K
A+
Education
4.9 / 5.0
48.6% bachelor's degree or higher
Sister Bay has a cool climate with an average annual temperature of 45°F (7°C). Winters average 19°F in January while summers reach 69°F in July. The area gets 270 sunny days per year. Annual precipitation totals 31.0 inches. The area receives 61.6 inches of snow annually. Air quality is rated Good with a median AQI of 38.
Temperature
19°F Jan (-7°C)
69°F Jul (20°C)
| Annual Average | 44.7°F |
| 17% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 69°F (20°C) |
| Sunny Days | 270 days/yr |
Geography
| Elevation | 716 ft (218 m) |
| Area | 3.6 sq mi (9.2 km²) |
| Population Density | 381/sq mi |
| Coordinates | 45.1871°N, 87.1294°W |
| Timezone | America/Chicago |
| County | Door County County |
| Nearest Airport | Menominee Regional (MNM) 25 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0457 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 46.9 / 100 |
| Social Vulnerability | 45.3 / 100 |
| Community Resilience | 99.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | No Rating |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 1.5 in | Coldest |
| February | 21°F (-6°C) | 1.0 in | Driest |
| March | 30°F (-1°C) | 1.7 in | |
| April | 40°F (5°C) | 2.3 in | |
| May | 52°F (11°C) | 2.9 in | |
| June | 61°F (16°C) | 3.4 in | |
| July | 69°F (20°C) | 3.0 in | Warmest |
| August | 67°F (19°C) | 3.4 in | |
| September | 59°F (15°C) | 3.4 in | Wettest |
| October | 49°F (9°C) | 2.6 in | |
| November | 37°F (3°C) | 2.4 in | |
| December | 26°F (-3°C) | 1.7 in |
Sister Bay has a seasonal temperature swing of 49°F / from 19°F in January to 69°F in July. Total annual precipitation is 29.2 inches, with September being the wettest month (3.4") and February the driest (1.0").