All Countries
Stillman Valley, IL
Full City Profile · Illinois · Ogle County County
4.0
/5.0
A
Great
1,261
Population
2,212/sq mi density
$87,311
Median Income
$37,710 per capita
$168,000
Home Value
$275,946 Zillow
$1,125
Median Rent
21.2% income on rent
49°F
Avg Temperature
260 sunny days/yr
A
Overall
4.0 / 5.0
Strong
A+
Economy
4.7 / 5.0
$87,311 median income, 0.7% unemployment
A+
Affordability
5.0 / 5.0
$168,000 home value, $1,125/mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
B+
Education
3.6 / 5.0
32.8% bachelor's degree or higher
Stillman Valley experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 22°F in January while summers reach 74°F in July. The area gets 260 sunny days per year. Annual precipitation totals 37.2 inches. The area receives 37.1 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
22°F Jan (-6°C)
74°F Jul (23°C)
| Annual Average | 49.4°F |
| 9% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 718 ft (219 m) |
| Area | 0.2 sq mi (0.5 km²) |
| Population Density | 2,212/sq mi |
| Coordinates | 42.1054°N, 89.1790°W |
| Timezone | America/Chicago |
| County | Ogle County County |
| Nearest Airport | Chicago/Rockford International (RFD) 7 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 71.1 / 100 |
| Social Vulnerability | 17.5 / 100 |
| Community Resilience | 86.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 1.4 in | Coldest |
| February | 24°F (-5°C) | 1.2 in | Driest |
| March | 35°F (2°C) | 2.4 in | |
| April | 48°F (9°C) | 3.6 in | |
| May | 59°F (15°C) | 3.9 in | |
| June | 69°F (20°C) | 4.5 in | Wettest |
| July | 74°F (23°C) | 3.8 in | Warmest |
| August | 70°F (21°C) | 4.1 in | |
| September | 63°F (17°C) | 3.8 in | |
| October | 51°F (11°C) | 2.8 in | |
| November | 37°F (3°C) | 2.7 in | |
| December | 25°F (-4°C) | 2.0 in |
Stillman Valley has a seasonal temperature swing of 52°F / from 22°F in January to 74°F in July. Total annual precipitation is 36.2 inches, with June being the wettest month (4.5") and February the driest (1.2").