St. Charles, MN
Full City Profile · Minnesota · Olmsted County County
3.7
/5.0
B+
Good
4,021
Population
1,055/sq mi density
$96,544
Median Income
$50,155 per capita
$231,300
Home Value
$368,746 Zillow
$941
Median Rent
25.4% income on rent
45°F
Avg Temperature
49
Violent Crime/100K
990 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$96,544 median income, 2.1% unemployment
A+
Affordability
5.0 / 5.0
$231,300 home value, $941/mo rent
F
Safety
1.0 / 5.0
49 violent crimes/100K
B+
Education
3.8 / 5.0
35.3% bachelor's degree or higher
St. Charles has a cool climate with an average annual temperature of 45°F (7°C). Winters average 15°F in January while summers reach 71°F in July. Annual precipitation totals 37.1 inches. The area receives 44.9 inches of snow annually. Air quality is rated Good with a median AQI of 44.
Temperature
15°F Jan (-10°C)
71°F Jul (21°C)
| Annual Average | 44.8°F |
| 17% below US avg | |
| January Average | 15°F (-10°C) |
| July Average | 71°F (21°C) |
Geography
| Elevation | 1,132 ft (345 m) |
| Area | 3.8 sq mi (9.9 km²) |
| Population Density | 1,055/sq mi |
| Coordinates | 43.9687°N, 92.0593°W |
| Timezone | America/Chicago |
| County | Olmsted County County |
| Nearest Airport | Rochester International (RST) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
| Good Days % | 63.9% |
| Unhealthy Days | 1 |
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 | 82.4 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 99.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | No Rating |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 15°F (-10°C) | 1.0 in | Coldest, Driest |
| February | 19°F (-7°C) | 1.2 in | |
| March | 32°F (-0°C) | 1.9 in | |
| April | 45°F (7°C) | 3.7 in | |
| May | 58°F (14°C) | 4.8 in | |
| June | 68°F (20°C) | 5.4 in | Wettest |
| July | 71°F (21°C) | 4.5 in | Warmest |
| August | 68°F (20°C) | 5.2 in | |
| September | 61°F (16°C) | 3.6 in | |
| October | 48°F (9°C) | 2.5 in | |
| November | 34°F (1°C) | 1.9 in | |
| December | 21°F (-6°C) | 1.3 in |
St. Charles has a seasonal temperature swing of 56°F / from 15°F in January to 71°F in July. Total annual precipitation is 37.1 inches, with June being the wettest month (5.4") and January the driest (1.0").